str_repeat
Before spending hours searching your application why it makes UTF-8 encoding into some malformed something with str_replace, make sure you save your PHP file in UTF-8 (NO BOM).
This was at least one of my problems.
str_replace
(PHP 4, PHP 5)
str_replace — 子字符串替换
说明
该函数返回一个字符串或者数组。该字符串或数组是将 subject 中全部的 search 都被 replace 替换之后的结果。
如果没有一些特殊的替换需求（比如正则表达式），你应该使用该函数替换 ereg_replace() 和 preg_replace()。
参数
如果 search 和 replace 为数组，那么 str_replace() 将对 subject 做二者的映射替换。如果 replace 的值的个数少于 search 的个数，多余的替换将使用空字符串来进行。如果 search 是一个数组而 replace 是一个字符串，那么 search 中每个元素的替换将始终使用这个字符串。该转换不会改变大小写。
如果 search 和 replace 都是数组，它们的值将会被依次处理。
-
search -
查找的目标值，也就是 needle。一个数组可以指定多个目标。
-
replace -
search的替换值。一个数组可以被用来指定多重替换。 -
subject -
执行替换的数组或者字符串。也就是 haystack。
如果
subject是一个数组，替换操作将遍历整个subject，返回值也将是一个数组。 -
count -
Note: 如果被指定，它的值将被设置为替换发生的次数。
返回值
该函数返回替换后的数组或者字符串。
更新日志
| 版本 | 说明 |
|---|---|
| 5.0.0 |
新增 count 参数。
|
| 4.3.3 |
函数行为改变。旧的版本中存在一个 BUG —— 当 search 和
replace 两个参数都是数组的时候，将导致空的 search 索引被跳过，但是却没有同时前移 replace 内部指针。该错误发生在 PHP 4.3.3，任何依赖于此 BUG 的脚本应该先除去空的查找值，从而模拟原始的行为。
|
| 4.0.5 | 大多数参数都可以为数组。 |
范例
Example #1 str_replace() 基本范例
<?php
// 赋值: <body text='black'>
$bodytag = str_replace("%body%", "black", "<body text='%body%'>");
// 赋值: Hll Wrld f PHP
$vowels = array("a", "e", "i", "o", "u", "A", "E", "I", "O", "U");
$onlyconsonants = str_replace($vowels, "", "Hello World of PHP");
// 赋值: You should eat pizza, beer, and ice cream every day
$phrase = "You should eat fruits, vegetables, and fiber every day.";
$healthy = array("fruits", "vegetables", "fiber");
$yummy = array("pizza", "beer", "ice cream");
$newphrase = str_replace($healthy, $yummy, $phrase);
// 赋值: 2
$str = str_replace("ll", "", "good golly miss molly!", $count);
echo $count;
?>
Example #2 可能的 str_replace() 替换范例
<?php
// 替换顺序
$str = "Line 1\nLine 2\rLine 3\r\nLine 4\n";
$order = array("\r\n", "\n", "\r");
$replace = '<br />';
// 首先替换 \r\n 字符，因此它们不会被两次转换
$newstr = str_replace($order, $replace, $str);
// 输出 F ，因为 A 被 B 替换，B 又被 C 替换，以此类推...
// 由于从左到右依次替换，最终 E 被 F 替换
$search = array('A', 'B', 'C', 'D', 'E');
$replace = array('B', 'C', 'D', 'E', 'F');
$subject = 'A';
echo str_replace($search, $replace, $subject);
// 输出: apearpearle pear
// 由于上面提到的原因
$letters = array('a', 'p');
$fruit = array('apple', 'pear');
$text = 'a p';
$output = str_replace($letters, $fruit, $text);
echo $output;
?>
注释
Note: 此函数可安全用于二进制对象。
Caution
了解替换顺序
由于 str_replace() 的替换时从左到右依次进行的，进行多重替换的时候可能会替换掉之前插入的值。参见该文档的范例。
Note:
该函数区分大小写。使用 str_ireplace() 可以进行不区分大小写的替换。
参见
- str_ireplace() - str_replace 的忽略大小写版本
- substr_replace() - 替换字符串的子串
- preg_replace() - 执行一个正则表达式的搜索和替换
- strtr() - 转换指定字符
add a note
User Contributed Notes
str_replace - [48 notes]
Anonymous ¶
6 years ago
moostende at gmail dot com ¶
1 year ago
Note that this does not replace strings that become part of replacement strings. This may be a problem when you want to remove multiple instances of the same repetative pattern, several times in a row.
If you want to remove all dashes but one from the string '-aaa----b-c-----d--e---f' resulting in '-aaa-b-c-d-e-f', you cannot use str_replace. Instead, use preg_replace:
<?php
$challenge = '-aaa----b-c-----d--e---f';
echo str_replace('--', '-', $challenge).'<br>';
echo preg_replace('/--+/', '-', $challenge).'<br>';
?>
This outputs the following:
-aaa--b-c---d-e--f
-aaa-b-c-d-e-f
mbullard at accuvista dot co dot uk ¶
1 year ago
Insert space after comma.
If you have a form that stores results in a database field as comma separated values, when you display this data you can use the following to insert a space after each comma:
<?php
$find[] = ',';
$replace[] = ', ';
$text = str_replace($find, $replace, $row_rsRecordset['Field']);
print_r($text);
?>
Notes:
1) To get round the Replacement Order Gotcha, the comma is also replaced with its code equivalent: ,
2) You can adapt the $replace section to suit your needs: swap out the code with <br/> or replace comma and space with · etc.
christof dot rieger at r-tron dot de ¶
1 year ago
In many countries the numeric format is 1.000,33 in english it is 1,000.33
This function converts numeric arguments always into the PHP confirm numeric format. If only one seperator is into the numericstring so it is interpreted as the decimalpoint.
function dp($zahl)
{
if ((strpos($zahl,".") > "-1") | (strpos($zahl,",") > "-1")) {
if ((strpos($zahl,".") > "-1") & (strpos($zahl,",") > "-1")) {
if (strpos($zahl,".") > strpos($zahl,",")){
return str_replace(",","",$zahl);
} else {
return str_replace(",",".",str_replace(".","",$zahl));
}
} else {
if (strpos($zahl,".") > "-1") {
if (strpos($zahl,".") == strrpos($zahl,".")) {
return $zahl;
} else {
return str_replace(".","",$zahl);
}
} else {
if (strpos($zahl,",") == strrpos($zahl,",")) {
return str_replace(",",".",$zahl);
} else {
return str_replace(",","",$zahl);
}
} }
} else {
return $zahl;
} }
Wes Foster ¶
3 years ago
Feel free to optimize this using the while/for or anything else, but this is a bit of code that allows you to replace strings found in an associative array.
For example:
<?php
$replace = array(
'dog' => 'cat',
'apple' => 'orange'
'chevy' => 'ford'
);
$string = 'I like to eat an apple with my dog in my chevy';
echo str_replace_assoc($replace,$string);
// Echo: I like to eat an orange with my cat in my ford
?>
Here is the function:
<?php
function strReplaceAssoc(array $replace, $subject) {
return str_replace(array_keys($replace), array_values($replace), $subject);
}
?>
[Jun 1st, 2010 - EDIT BY thiago AT php DOT net: Function has been replaced with an updated version sent by ljelinek AT gmail DOT com]
cc at cc dot com ¶
1 year ago
I found a pretty low tech solution to avoid the "gotcha" without worrying about the array order of how things are replaced. I could not "order" the replacement array easily because it was being read from a database table.
Anyway if you add an identifiable token to each replaced word, then just filter this out at the very end, no nested search terms are found. I just dynamically add the %% after the first char of each word before pumping it into the str_ireplace function.
$find = array("as1", "as2", "as3", "flex");
$replace = array("<a href = \"#as1\">A%%uto S%%entry R%%ev. A%%</a>", "<a href = \"#as2\">A%%uto S%%entry E%%xp</a>", "<a href = \"#as3\">A%%uto S%%entry f%%lex</a>", "<a style = \"color: red;\" href = \"#flex\">f%%lex</a>");
$text = str_ireplace($find, $replace, $text);
echo str_ireplace("%%", "", $text);
In this case I am using %% as my token as this is an unlikely char combo for me.
Denzel Morris ¶
1 year ago
Maybe obvious to veteran PHP programmers but less so to novice PHP programmers is the fact that this is invalid:
<?php
str_replace($search, $replace, $subject, 1);
?>
At a glance it appears to be a reasonable request, until you realize that the fourth parameter must be a variable in order to be passed as a reference. A replacement:
<?php
str_replace($search, $replace, $subject, $temp = 1);
// or
$temp = 1;
str_replace($search, $replace, $subject, $temp);
?>
nikolaz dot tang at hotmail dot com ¶
2 years ago
A faster way to replace the strings in multidimensional array is to json_encode() it, do the str_replace() and then json_decode() it, like this:
<?php
function str_replace_json($search, $replace, $subject){
return json_decode(str_replace($search, $replace, json_encode($subject)));
}
?>
This method is almost 3x faster (in 10000 runs.) than using recursive calling and looping method, and 10x simpler in coding.
Compared to:
<?php
function str_replace_deep($search, $replace, $subject)
{
if (is_array($subject))
{
foreach($subject as &$oneSubject)
$oneSubject = str_replace_deep($search, $replace, $oneSubject);
unset($oneSubject);
return $subject;
} else {
return str_replace($search, $replace, $subject);
}
}
?>
kole ¶
6 years ago
My input is MS Excel file but I want to save ‘,’,“,” as ',',",".
$badchr = array(
"\xc2", // prefix 1
"\x80", // prefix 2
"\x98", // single quote opening
"\x99", // single quote closing
"\x8c", // double quote opening
"\x9d" // double quote closing
);
$goodchr = array('', '', '\'', '\'', '"', '"');
str_replace($badchr, $goodchr, $strFromExcelFile);
Works for me.
jbarnett at jmbelite dot com ¶
3 years ago
Might be worth mentioning that a SIMPLE way to accomplish Example 2 (potential gotchas) is to simply start your "replacements" in reverse.
So instead of starting from "A" and ending with "E":
<?php
$search = array('A', 'B', 'C', 'D', 'E');
$replace = array('B', 'C', 'D', 'E', 'F');
// replaces A to B, B to C, C to D, D to E, E to F (makes them all F)
// start from "E" and end with "A":
$search = array('E', 'D', 'C', 'B', 'A');
$replace = array('F', 'E', 'D', 'C', 'B');
// replaces E to F, D to E, C to D, B to C, A to B (prevents from
// multiple replacements of already replaced values)
?>
So basically start from the "end" and put the replacements in an order where the "replaced value" won't equal a value that exists later in the "search array".
Chris ¶
3 years ago
Compress a string's internal spaces:
<?php
$str = ' This is a test ';
$count = 1;
while($count)
$str = str_replace(' ', ' ', $str, $count);
?>
Daniel Loureiro ¶
3 months ago
if you need to remove accents of string (ex. if you are a portuguese speaker), you can use this:
<?php
function remove_accents($str)
{
$from = array(
"á", "à", "â", "ã", "ä", "é", "è", "ê", "ë", "í", "ì", "î", "ï",
"ó", "ò", "ô", "õ", "ö", "ú", "ù", "û", "ü", "ç", "Á", "À", "Â",
"Ã", "Ä", "É", "È", "Ê", "Ë", "Í", "Ì", "Î", "Ï", "Ó", "Ò", "Ô",
"Õ", "Ö", "Ú", "Ù", "Û", "Ü", "Ç"
);
$to = array(
"a", "a", "a", "a", "a", "e", "e", "e", "e", "i", "i", "i", "i",
"o", "o", "o", "o", "o", "u", "u", "u", "u", "c", "A", "A", "A",
"A", "A", "E", "E", "E", "E", "I", "I", "I", "I", "O", "O", "O",
"O", "O", "U", "U", "U", "U", "C"
);
return str_replace($from, $to, $str);
}
echo remove_accents("Açaí não é maçã");
?>
mevdschee ¶
2 years ago
say you want every "a" replaced by "abba" and every "b" replaced by "baab" in the string "ab" you do:
<?php
$search = array("a","b");
$replace = array("abba","baab");
echo str_replace($search,$replace,"ab");
?>
that results in "abaabbaababaab" and not the expected "abbabaab"
I wrote this little snippet to solve the replacements-in-replacement problem:
<?php
function search_replace($s,$r,$sql)
{ $e = '/('.implode('|',array_map('preg_quote', $s)).')/';
$r = array_combine($s,$r);
return preg_replace_callback($e, function($v) use ($s,$r) { return $r[$v[1]]; },$sql);
}
echo search_replace($search,$replace,"ab");
?>
that results in the expected "abbabaab"
pjcdawkins at googlemail dot com ¶
3 years ago
Here's a deep replace function allowing multi-dimensional arrays in $search, $replace and $subject. The keys and other structure of $subject are preserved.
<?php
// Auxiliary function:
function _replaceWithAnything($search,$replace,$subject){
if(!is_array($search) || !is_array($replace)){
$search=array($search);
$replace=array($replace);
}
$match=array_search($subject,$search,true);
if($match!==false && array_key_exists($match,$replace))
$subject=$replace[$match];
return $subject;
}
// Main function:
function deepReplace($search,$replace,$subject){
if(!is_array($subject))
return _replaceWithAnything($search,$replace,$subject);
foreach($subject as &$val){
if(is_array($val)){
$val=deepReplace($search,$replace,$val);
continue;
}
$val=_replaceWithAnything($search,$replace,$val);
}
return $subject;
}
?>
troy at troyonline dot com ¶
4 years ago
Yet another deep replace function:
<?php
function str_replace_deep( $search, $replace, $subject)
{
$subject = str_replace( $search, $replace, $subject);
foreach ($subject as &$value)
is_array( $value) and $value =str_replace_deep( $search, $replace, $value);
return $subject;
}
?>
hakre ¶
1 year ago
I was looking for a str_replace function supporting callbacks. As I didn't found one I wrote one my own. Works exactly like str_replace, but the replace parameter is a callback or an array of callbacks (instead of string/strings in str_replace). The callback function accepts two arguments, the string that is being replaced and the count of the replacement being done.
<?php
/**
* str_ureplace
*
* str_replace like function with callback
*
* @param string|array search
* @param callback|array $replace
* @param string|array $subject
* @param int $replace_count
* @return string|array subject with replaces, FALSE on error.
*/
function str_ureplace($search, $replace, $subject, &$replace_count = null) {
$replace_count = 0;
// validate input
$search = array_values((array) $search);
$searchCount = count($search);
if (!$searchCount) {
return $subject;
}
foreach($search as &$v) {
$v = (string) $v;
}
unset($v);
$replaceSingle = is_callable($replace);
$replace = $replaceSingle ? array($replace) : array_values((array) $replace);
foreach($replace as $index=>$callback) {
if (!is_callable($callback)) {
throw new Exception(sprintf('Unable to use %s (#%d) as a callback', gettype($callback), $index));
}
}
// search and replace
$subjectIsString = is_string($subject);
$subject = (array) $subject;
foreach($subject as &$haystack) {
if (!is_string($haystack)) continue;
foreach($search as $key => $needle) {
if (!$len = strlen($needle))
continue;
$replaceSingle && $key = 0;
$pos = 0;
while(false !== $pos = strpos($haystack, $needle, $pos)) {
$replaceWith = isset($replace[$key]) ? call_user_func($replace[$key], $needle, ++$replace_count) : '';
$haystack = substr_replace($haystack, $replaceWith, $pos, $len);
}
}
}
unset($haystack);
return $subjectIsString ? reset($subject) : $subject;
}
?>
eggmatters at gmail dot com ¶
1 year ago
I noticed that if you use mysql_real_escape_string() before performing str_replace, it won't work. This may be dependent on the string being replaced. Specifically, the following, won't work:
<?php
$formattedPost = mysql_real_escape_string($formattedPost);
$formattedPost = str_replace("\\r\\n", "<br>", $comment);
?>
Do this instead:
<?php
$formattedPost = str_replace("\\r\\n", "<br>", $comment);
$formattedPost = mysql_real_escape_string($formattedPost);
?>
jay_knows_(all)uk at hotmail dot com ¶
2 years ago
This strips out horrible MS word characters.
Just keep fine tuning it until you get what you need, you'll see ive commented some out which caused problems for me.
There could be some that need adding in, but its a start to anyone who wishes to make their own custom function.
<?php
function msword_conversion($str)
{
$str = str_replace(chr(130), ',', $str); // baseline single quote
$str = str_replace(chr(131), 'NLG', $str); // florin
$str = str_replace(chr(132), '"', $str); // baseline double quote
$str = str_replace(chr(133), '...', $str); // ellipsis
$str = str_replace(chr(134), '**', $str); // dagger (a second footnote)
$str = str_replace(chr(135), '***', $str); // double dagger (a third footnote)
$str = str_replace(chr(136), '^', $str); // circumflex accent
$str = str_replace(chr(137), 'o/oo', $str); // permile
$str = str_replace(chr(138), 'Sh', $str); // S Hacek
$str = str_replace(chr(139), '<', $str); // left single guillemet
// $str = str_replace(chr(140), 'OE', $str); // OE ligature
$str = str_replace(chr(145), "'", $str); // left single quote
$str = str_replace(chr(146), "'", $str); // right single quote
// $str = str_replace(chr(147), '"', $str); // left double quote
// $str = str_replace(chr(148), '"', $str); // right double quote
$str = str_replace(chr(149), '-', $str); // bullet
$str = str_replace(chr(150), '-–', $str); // endash
$str = str_replace(chr(151), '--', $str); // emdash
// $str = str_replace(chr(152), '~', $str); // tilde accent
// $str = str_replace(chr(153), '(TM)', $str); // trademark ligature
$str = str_replace(chr(154), 'sh', $str); // s Hacek
$str = str_replace(chr(155), '>', $str); // right single guillemet
// $str = str_replace(chr(156), 'oe', $str); // oe ligature
$str = str_replace(chr(159), 'Y', $str); // Y Dieresis
$str = str_replace('°C', '°C', $str); // Celcius is used quite a lot so it makes sense to add this in
$str = str_replace('£', '£', $str);
$str = str_replace("'", "'", $str);
$str = str_replace('"', '"', $str);
$str = str_replace('–', '–', $str);
return $str;
}
?>
bfrohs at gmail dot com ¶
11 months ago
This function implements $limit for str_replace(); is 100% backward compatible with str_replace(); uses str_replace() whenever possible (for performance reasons); supports arrays for $search, $replace, and $subject; and is fully commented.
<?php
/**
* Replace $limit occurences of the search string with the replacement
* @param mixed $search The value being searched for. An array may be used to
* designate multiple needles.
* @param mixed $replace The replacement value that replaces found search
* values. An array may be used to designate multiple replacements.
* @param mixed $subject The string or array being searched and replaced on. If
* subject is an array, then the search and replace is performed with every
* entry of subject, and the return value is an array as well.
* @param string $count If passed, this will be set to the number of
* replacements performed.
* @param int $limit The maximum possible replacements for each pattern in each
* subject string. Defaults to -1 (no limit).
* @return string This function returns a string with the replaced values.
*/
function str_replace_limit($search, $replace, $subject, &$count, $limit = -1){
$count = 0;
// Invalid $limit provided
if(!($limit===strval(intval(strval($limit))))){
trigger_error('Invalid $limit `'.$limit.'` provided. Expecting an '.
'integer', E_USER_WARNING);
return $subject;
}
// Invalid $limit provided
if($limit<-1){
trigger_error('Invalid $limit `'.$limit.'` provided. Expecting -1 or '.
'a positive integer', E_USER_WARNING);
return $subject;
}
// No replacements necessary
if($limit===0){
trigger_error('Invalid $limit `'.$limit.'` provided. Expecting -1 or '.
'a positive integer', E_USER_NOTICE);
return $subject;
}
// Use str_replace() when possible
if($limit===-1){
return str_replace($search, $replace, $subject, $count);
}
if(is_array($subject)){
// Loop through $subject values
foreach($subject as $key => $this_subject){
// Skip values that are arrays
if(!is_array($this_subject)){
// Call this function again
$this_function = __FUNCTION__;
$subject[$key] = $this_function($search, $replace, $this_subject, $this_count, $limit);
// Adjust $count
$count += $this_count;
// Adjust $limit
if($limit!=-1){
$limit -= $this_count;
}
// Reached $limit
if($limit===0){
return $subject;
}
}
}
return $subject;
} elseif(is_array($search)){
// Clear keys of $search
$search = array_values($search);
// Clear keys of $replace
if(is_array($replace)){
$replace = array_values($replace);
}
// Loop through $search
foreach($search as $key => $this_search){
// Don't support multi-dimensional arrays
$this_search = strval($this_search);
// If $replace is an array, use $replace[$key] if exists, else ''
if(is_array($replace)){
if(array_key_exists($key, $replace)){
$this_replace = strval($replace[$key]);
} else {
$this_replace = '';
}
} else {
$this_replace = strval($replace);
}
// Call this function again for
$this_function = __FUNCTION__;
$subject = $this_function($this_search, $this_replace, $subject, $this_count, $limit);
// Adjust $count
$count += $this_count;
// Adjust $limit
if($limit!=-1){
$limit -= $this_count;
}
// Reached $limit
if($limit===0){
return $subject;
}
}
return $subject;
} else {
$search = strval($search);
$replace = strval($replace);
// Get position of first $search
$pos = strpos($subject, $search);
// Return $subject if $search cannot be found
if($pos===false){
return $subject;
}
// Get length of $search
$search_len = strlen($search);
// Loop until $search cannot be found or $limit is reached
for($i=0;(($i<$limit)||($limit===-1));$i++){
$subject = substr_replace($subject, $replace, $pos, $search_len);
// Increase $count
$count++;
// Get location of next $search
$pos = strpos($subject, $search);
// Break out of loop
if($pos===false){
break;
}
}
return $subject;
}
}
?>
cmbecker69 at gmx dot de ¶
2 days ago
To collapse multiple consecutive space characters to a single one, don't use str_replace() inside a loop--use preg_replace() instead for clarity and better performance:
<?php
$str = ' This is a test ';
$str = preg_replace('/ +/', ' ', $str);
?>
windowshater ¶
1 year ago
I hope this helps someone who has gone insane for 4 hours...
If you have someone posting weird windows curly quotes into your forms and you cannot replace them using str_replace.
I tried using mb_convert_encoding to convert the string to UTF-8 and then to do a str_replace but still no joy.
I tried to str_replace using the \xe2\x80\x98 codes and also using the chr(145), chr(146), chr(147) codes.
Nothing worked... It would replace the quotes but then ADD a question mark in a diamond !!!! no idea why..
in the end i just url encoded the string and replaced teh html codes:
$search_weird_chars = array( '%E2%80%99',
'%E2%80%99',
'%E2%80%98',
'%E2%80%9C',
'%E2%80%9D'
);
$this->post_array[$key] = urlencode($this->post_array[$key]);
$this->post_array[$key] = str_replace($search_weird_chars, "'", $this->post_array[$key]);
$this->post_array[$key] = urldecode($this->post_array[$key]);
this works although it is a totally retarded thing to have to do .. oh well. :-)
matthew at euphoriccode dot com ¶
1 year ago
If you are looking to implement str with password generation the following function will help;
<?php
function gen_pass_process($girth = 17) {
$str = '';
for($1 = 0; $i<$girth; $i++) {
$str . = chr(rand(48,122));
}
return $str;
}
?>
didiergm ¶
1 year ago
php 5.3.2 (may exist before, but it never saw it until today)
the replace is always evaluated before the search takes place.
So if like me you use str_replace to replace some macros in the html code, and these replacement call a function, you must be aware that the functions always runs, not only when the search is found.
for example:
str_replace (
array ('%macro1%', '%macro2%'),
array (myfunction1(), myfunction2(),
thesource);
myfunction1() and myfunction2() are called regardless of the fact that the source contains %macro1%' or '%macro2%' or not. I genuinely believed that myfunction1 would only be called if %macro1% was found (resp myfunction2 and %macro2%)
I noticed it because myfunction1 was running a database query to increment a value and I noticed that this value was incremented w/o need. It took me a wee while to get to the bottom of it
cableray ¶
3 years ago
If you wish to get around the 'gotcha', you could do something like this:
<?php
$find=array('a', 'p', '^', '*');
$replace = array('^', '*', 'apple', 'pear');
str_replace($find, $replace, 'a p');
?>
The idea here is that you first replace the items you want with unique identifiers (that you are unlikely to find in the subject) and then search for those identifiers and then replace them.
christian dot reinecke at web dot de ¶
3 years ago
If you need to replace a string in another, but only once but still in all possible combinations (f.e. to replace "a" with "x" in "aba" to get array("xba", "abx")) you can use this function:
<?php
function getSingleReplaceCombinations($replace, $with, $inHaystack)
{
$splits = explode($replace, $inHaystack);
$result = array();
for ($i = 1, $ix = count($splits); $i < $ix; ++$i) {
$previous = array_slice($splits, 0, $i);
$next = array_slice($splits, $i);
$combine = array_pop($previous) . $with . array_shift($next);
$result[] = implode($replace, array_merge($previous, array($combine), $next));
}
return $result;
}
var_dump(getSingleReplaceCombinations("a", "x", "aba")); // result as mentioned above
?>
It may not be the best in performance, but it works.
fleshgrinder at gmx dot at ¶
3 years ago
Fast function to replace new lines from a given string. This is interesting to replace all new lines from e. g. a text formatted in HTML retrieved from database and printing it without the unnecessary new lines. This results in slightly faster rendering in the Web browser.
<?php
/**
* Replace all linebreaks with one whitespace.
*
* @access public
* @param string $string
* The text to be processed.
* @return string
* The given text without any linebreaks.
*/
function replace_newline($string) {
return (string)str_replace(array("\r", "\r\n", "\n"), '', $string);
}
?>
moz667 at gmail dot com ¶
4 years ago
<?php
/*
This is a function for made recursive str_replaces in an array
*/
function recursive_array_replace($find, $replace, &$data) {
if (is_array($data)) {
foreach ($data as $key => $value) {
if (is_array($value)) {
recursive_array_replace($find, $replace, $data[$key]);
} else {
$data[$key] = str_replace($find, $replace, $value);
}
}
} else {
$data = str_replace($find, $replace, $data);
}
}
$a = array();
$a['a'] = "a";
$a['b']['a'] = "ba";
$a['b']['b'] = "bb";
$a['c'] = "c";
$a['d']['a'] = "da";
$a['d']['b'] = "db";
$a['d']['c'] = "dc";
$a['d']['d'] = "dd";
echo "Before Replaces";
print_r($a);
recursive_array_replace("a", "XXXX", $a);
echo "After Replaces";
print_r($a);
?>
nospam at nospam dot com ¶
4 years ago
Replacement for str_replace in which a multiarray of numerically keyed data can be properly evaluated with the given template without having a search for 11 be mistaken for two 1's next to each other
<?php
function data_template($input, $template) {
if ($template) { // template string
if ($split = str_split($template)) { // each char as array member
foreach ($split as $char) { // each character
if (is_numeric($char)) { // test for digit
if ($s != 1) { // new digit sequence
$i++;
$s = 1;
}
$digits[$i] .= $char; // store digit
} else { // not a digit
if ($s != 2) { // new non-digit sequence
$i++;
$s = 2;
}
$strings[$i] .= $char; // store string
}
}
if ($i && $input && is_array($input)) { // input data
foreach ($input as $sub) { // each subarray
if (is_array($sub)) {
$out = ''; // reset output
for ($j = 0; $j <= $i; $j++) { // each number/string member
if ($number = $digits[$j]) { // number
$out .= $sub[$number]; // add value from subarray to output
} else { // string
$out .= $strings[$j]; // add to output
}
}
$a[] = $out;
}
}
return $a;
} // input
} // split
} // template
}
$input = array(array(1=>'yellow', 2=>'banana', 11=>'fruit'), array(1=>'green', 2=>'spinach', 11=>'vegetable'), array(1=>'pink', 2=>'salmon', 11=>'fish'));
print_r (data_template($input, '2: a 1, healthy 11'));
/*
Array
(
[0] => banana: a yellow, healthy fruit
[1] => spinach: a green, healthy vegetable
[2] => salmon: a pink, healthy fish
)
*/
// str_replace would have wanted to output 'banana: a yellow, healthy yellowyellow
?>
Not sure if this will help anyone but I wrote it for my application and thought I would share just in case
nick at NOSPAM dot pitchinteractive dot com ¶
4 years ago
I tried max at efoxdesigns dot com solution for str_replace_once but it didn't work quite right so I came up with this solution (all params must be strings):
<?php
function str_replace_once($search, $replace, $subject) {
$firstChar = strpos($subject, $search);
if($firstChar !== false) {
$beforeStr = substr($subject,0,$firstChar);
$afterStr = substr($subject, $firstChar + strlen($search));
return $beforeStr.$replace.$afterStr;
} else {
return $subject;
}
}
?>
paolo A T doppioclick D O T com ¶
4 years ago
For PHP 4 < 4.4.5 and PHP 5 < 5.2.1 you may occur (like me) in this bug:
http://www.php-security.org/MOPB/MOPB-39-2007.html
David Gimeno i Ayuso (info at sima dot cat) ¶
5 years ago
With PHP 4.3.1, at least, str_replace works fine when working with single arrays but mess it all with two or more dimension arrays.
<?php
$subject = array("You should eat this","this","and this every day.");
$search = "this";
$replace = "that";
$new = str_replace($search, $replace, $subject);
print_r($new); // Array ( [0] => You should eat that [1] => that [2] => and that every day. )
echo "<hr />";
$subject = array(array("first", "You should eat this")
,array("second","this")
,array("third", "and this every day."));
$search = "this";
$replace = "that";
$new = str_replace($search, $replace, $subject);
print_r($new); // Array ( [0] => Array [1] => Array [2] => Array )
?>
Kai Hoerner ¶
1 year ago
If you want to replace only a specific occurance of a needle, you can use this handy function:
<?php
function str_replace_occurance($search, $replace, $subject, $occurance) {
$pos = 0;
for ($i = 0; $i <= $occurance; $i++) {
$pos = strpos($subject, $search, $pos);
}
return substr_replace($subject, $replace, $pos, strlen($search));
}
$str = "hello world! hello again! say hello!";
$str = str_replace_occurance('hello', 'hi', $str, 1);
$str = str_replace_occurance('hello', 'lets do this', $str, 2);
echo $str, PHP_EOL;
?>
Example output: "hi world! lets do this again! say hello!"
biohazard dot ge at gmail dot com ¶
2 years ago
Replace and match strings between two needles in large haystack quicker (?):
<?php
//Assume you have input:
$input = "<p> Images
<img src='some/image_1.jpg'> This is a cat
and <img src=some/image_2.jpg> That is a bat
and <img src="some/image_3.jpg"> What is this
and <img src=some/image_4.jpg> What is that
</p>
";
between_replace ('<img src="','">', $input, "{*}");
between_replace ('<img src=\'','\'>', $input, "{*}");
between_replace ('<img src=','>', $input, "'{*}'");
//As result we have
//$input == "<p> Images
// <img src='some/image_1.jpg'> This is a cat
//and <img src='some/image_2.jpg'> That is a bat
//and <img src='some/image_3.jpg'> What is this
//and <img src='some/image_4.jpg'> What is that
//</p>
//";
$result = between_fetch ("<img src='","'>", $input);
// $result == array ('some/image_1.jpg', 'some/image_2.jpg', 'some/image_3.jpg', 'some/image_4.jpg');
?>
Not a good example but only with them and str_replace I parsed word converted html for epub. This is what people invent not willing to get familiar with regular expressions...
<?php
function between_replace ($open, $close, &$in, $with, $limit=false, $from=0)
{
if ($limit!==false && $limit==0)
{
return $in;
}
$open_position = strpos ($in, $open, $from);
if ($open_position===false)
{
return false;
};
$close_position = strpos ($in, $close, $open_position+strlen($open));
if ($close_position===false)
{
return false;
};
$current = false;
if (strpos($with,'{*}')!==false)
{
$current = substr ($in, $open_position+strlen($open), $close_position-$open_position-strlen($open));
$current = str_replace ('{*}',$current,$with);
//debug_echo ($current);
}
else
{
$current = $with;
}
$in = substr_replace ($in, $current, $open_position+strlen($open), $close_position-$open_position-strlen($open));
$next_position = $open_position + strlen($current) + 1;
if ($next_position>=strlen($in))
{
return false;
}
if ($limit!==false)
{
$limit--;
}
between_replace ($open, $close, $in, $with, $limit, $next_position);
return $in;
}
function between_fetch ($open, $close, &$in, &$result=null, $with='', $limit=false, $from=0)
{
if ($limit!==false && $limit==0)
{
return $in;
};
if (!is_array($result))
{
$result = array ();
}
$open_position = strpos ($in, $open, $from);
if ($open_position===false)
{
return false;
};
$close_position = strpos ($in, $close, $open_position+strlen($open));
if ($close_position===false)
{
return false;
};
$current = substr ($in, $open_position+strlen($open), $close_position-$open_position-strlen($open));
$next_position = $open_position + strlen($current) + 1;
if ($with!='')
{
$current = str_replace('{*}', $current, $with);
}
$result[] = $current;
if ($next_position>=strlen($in))
{
return false;
}
if ($limit!==false)
{
$limit--;
}
between_fetch ($open, $close, $in, $result, $with, $limit, $next_position);
return $in;
}
?>
Steve ¶
2 years ago
Just a note about the json_decode solution from nikolaz dot tang at hotmail dot com
It may return an instance of stdClass, which may not quite be what you want. (using multi-dimensional arrays)
IF you want to be sure, stick to the proper recursive solution.
apmuthu at usa dot net ¶
2 years ago
If we have a html template that contains placeholders in curly braces that need to be replaced in runtime, the following function will do it using str_replace:
<?php
function parse_template($filename, $data) {
// example template variables {a} and {bc}
// example $data array
// $data = Array("a" => 'one', "bc" => 'two');
$q = file_get_contents($filename);
foreach ($data as $key => $value) {
$q = str_replace('{'.$key.'}', $value, $q);
}
return $q;
}
?>
jonathon at compwright dot com ¶
3 years ago
If you get a blank page when passing an object to str_replace() (relying on __toString() to convert the object to a string) then you may need to force string context using (string), like so:
<?php
private function _load_vars($vars, &$source = false) {
if(!$source) $source =& $this->code;
foreach((array)$vars as $key => $var) {
$source = str_replace("{".$key."}", (string) $var, $source);
}
}
}
?>
I was running Ubuntu Server with PHP 5.2.6 and getting apache segfaults and mysterious blank pages when $var happened to be certain objects.
Decko ¶
3 years ago
As mentioned earlier you should take the order into account when substituting multiple values.
However it is worth noticing that str_replace doesn't seem to re-read the string when doing single replacements. Take the following example.
<?php
$s = '/a/a/';
$s = str_replace('/a/', '/', $s);
?>
You would expect the following.
First replacement '/a/a/' -> '/a/'
Second replacement '/a/'->'/'
This is not the case, the actual result will be '/a/'.
To fix this, you will have to put str_replace in a while-loop.
<?php
$s = '/a/a/';
while(strpos($s, '/a/') !== false)
$s = str_replace('/a/', '/', $s); //eventually $s will == '/'
?>
Alberto Lepe ¶
4 years ago
Be careful when replacing characters (or repeated patterns in the FROM and TO arrays):
For example:
<?php
$arrFrom = array("1","2","3","B");
$arrTo = array("A","B","C","D");
$word = "ZBB2";
echo str_replace($arrFrom, $arrTo, $word);
?>
I would expect as result: "ZDDB"
However, this return: "ZDDD"
(Because B = D according to our array)
To make this work, use "strtr" instead:
<?php
$arr = array("1" => "A","2" => "B","3" => "C","B" => "D");
$word = "ZBB2";
echo strtr($word,$arr);
?>
This returns: "ZDDB"
michael dot moussa at gmail dot com ¶
4 years ago
As previous commentators mentioned, when $search contains values that occur earlier in $replace, str_replace will factor those previous replacements into the process rather than operating solely on the original string. This may produce unexpected output.
Example:
<?php
$search = array('A', 'B', 'C', 'D', 'E');
$replace = array('B', 'C', 'D', 'E', 'F');
$subject = 'ABCDE';
echo str_replace($search, $replace, $subject); // output: 'FFFFFF'
?>
In the above code, the $search and $replace should replace each occurrence in the $subject with the next letter in the alphabet. The expected output for this sample is 'BCDEF'; however, the actual output is 'FFFFF'.
To more clearly illustrate this, consider the following example:
<?php
$search = array('A', 'B', 'C', 'D', 'E');
$replace = array('B', 'C', 'D', 'E', 'F');
$subject = 'A';
echo str_replace($search, $replace, $subject); // output: 'F'
?>
Since 'A' is the only letter in the $search array that appears in $subject, one would expect the result to be 'B'; however, replacement number $n does *not* operate on $subject, it operates on $subject after the previous $n-1 replacements have been completed.
The following function utilizes array_combine and strtr to produce the expected output, and I believe it is the most efficient way to perform the desired string replacement without prior replacements affecting the final result.
<?php
/**
* When using str_replace(...), values that did not exist in the original string (but were put there by previous
* replacements) will be replaced continuously. This string replacement function is designed replace the values
* in $search with those in $replace while not factoring in prior replacements. Note that this function will
* always look for the longest possible match first and then work its way down to individual characters.
*
* The "o" in "stro_replace" represents "original", indicating that the function operates only on the original string.
*
* @param array $search list of strings or characters that need to be replaced
* @param array $replace list of strings or characters that will replace the corresponding values in $search
* @param string $subject the string on which this operation is being performed
*
* @return string $subject with all substrings in the $search array replaced by the values in the $replace array
*/
function stro_replace($search, $replace, $subject)
{
return strtr( $subject, array_combine($search, $replace) );
}
$search = array('A', 'B', 'C', 'D', 'E');
$replace = array('B', 'C', 'D', 'E', 'F');
$subject = 'ABCDE';
echo stro_replace($search, $replace, $subject); // output: 'BCDEF'
?>
Some other examples:
<?php
$search = array(' ', '&');
$replace = array(' ', '&');
$subject = 'Hello & goodbye!';
// We want to replace the spaces with and the ampersand with &
echo str_replace($search, $replace, $subject); // output: "Hello&nbsp&&nbspgoodbye!" - wrong!
echo stro_replace($search, $replace, $subject); // output: "Hello & goodbye!" - correct!
/*
Note: Run the above code in the CLI or view source on your web browser - the replacement strings for stro_replace are HTML entities which the browser interprets.
*/
?>
<?php
$search = array('ERICA', 'AMERICA');
$replace = array('JON', 'PHP');
$subject = 'MIKE AND ERICA LIKE AMERICA';
// We want to replace the name "ERICA" with "JON" and the word "AMERICA" with "PHP"
echo str_replace($search, $replace, $subject); // output: "MIKE AND JON LIKE AMJON", which is not correct
echo stro_replace($search, $replace, $subject); // output: "MIKE AND JON LIKE PHP", which is correct
?>
tim at hysniu dot com ¶
6 years ago
I found that having UTF-8 strings in as argument didnt
work for me using heavyraptors function.
Adding UTF-8 as argument on htmlentities
fixed the problem.
cheers, tim at hysniu.com
<?php
function replace_accents($str) {
$str = htmlentities($str, ENT_COMPAT, "UTF-8");
$str = preg_replace(
'/&([a-zA-Z])(uml|acute|grave|circ|tilde);/',
'$1',$str);
return html_entity_decode($str);
}
?>
matt wheaton ¶
7 years ago
As an effort to remove those Word copy and paste smart quotes, I've found that this works with UTF8 encoded strings (where $text in the following example is UTF8). Also the elipsis and em and en dashes are replaced.
There is an "invisible" character after the †for the right side double smart quote that doesn't seem to display here. It is chr(157).
<?php
$find[] = '“'; // left side double smart quote
$find[] = 'â€'; // right side double smart quote
$find[] = '‘'; // left side single smart quote
$find[] = '’'; // right side single smart quote
$find[] = '…'; // elipsis
$find[] = '—'; // em dash
$find[] = '–'; // en dash
$replace[] = '"';
$replace[] = '"';
$replace[] = "'";
$replace[] = "'";
$replace[] = "...";
$replace[] = "-";
$replace[] = "-";
$text = str_replace($find, $replace, $text);
?>
ahmed dot 3abdolah at gmail dot com ¶
1 year ago
Hello , this is a simple function programed by str_replace for crypting password and ....etc .
You can do verry much think with str_replace :
look at this:
<?PHP
/*
*This Function Is programed By MR-O
*The first arabic Function for crypting
*/
function abo($variable){
$variable =str_replace("1",1 ^ 52 ,$variable);
$variable =str_replace("2",2 ^ 5 ,$variable);
$variable =str_replace("3",3 ^ 8 ,$variable);
$variable =str_replace("4",4 ^ 18 ,$variable);
$variable =str_replace("5",5 ^ 30 ,$variable);
$variable =str_replace("6",6 ^ 42 ,$variable);
$variable =str_replace("7",7 ^ 26 ,$variable);
$variable =str_replace("8",8 ^ 62 ,$variable);
$variable =str_replace("9",9 ^ 1 ,$variable);
$variable =str_replace("0",0 ^ 3 ,$variable);
$variable =str_replace("a","m8" ,$variable);
$variable =str_replace("b","2s" ,$variable);
$variable =str_replace("c","9e" ,$variable);
$variable =str_replace("d","6s" ,$variable);
$variable =str_replace("e","a3" ,$variable);
$variable =str_replace("f","m3" ,$variable);
$variable =str_replace("g","6f" ,$variable);
$variable =str_replace("h","9c" ,$variable);
$variable =str_replace("i","85" ,$variable);
$variable =str_replace("j","32" ,$variable);
$variable =str_replace("k","1a" ,$variable);
$variable =str_replace("l","6e" ,$variable);
$variable =str_replace("m","5f" ,$variable);
$variable =str_replace("n","9r" ,$variable);
$variable =str_replace("o","z0" ,$variable);
$variable =str_replace("p","y6" ,$variable);
$variable =str_replace("q","9i" ,$variable);
$variable =str_replace("r","y9" ,$variable);
$variable =str_replace("s","5g" ,$variable);
$variable =str_replace("t","p3" ,$variable);
$variable =str_replace("u","d5" ,$variable);
$variable =str_replace("v","t8" ,$variable);
$variable =str_replace("w","2x" ,$variable);
$variable =str_replace("x","6w" ,$variable);
$variable =str_replace("y","v9" ,$variable);
$variable =str_replace("z","zv" ,$variable);
$variable =str_replace("A","m8" ,$variable);
$variable =str_replace("B","24d" ,$variable);
$variable =str_replace("C","9e" ,$variable);
$variable =str_replace("D","6s2" ,$variable);
$variable =str_replace("E","qw" ,$variable);
$variable =str_replace("F","oe" ,$variable);
$variable =str_replace("G","0t" ,$variable);
$variable =str_replace("H","o9" ,$variable);
$variable =str_replace("I","74" ,$variable);
$variable =str_replace("J","dd" ,$variable);
$variable =str_replace("K","2b" ,$variable);
$variable =str_replace("L","rt" ,$variable);
$variable =str_replace("M","0c" ,$variable);
$variable =str_replace("N","2w" ,$variable);
$variable =str_replace("O","te" ,$variable);
$variable =str_replace("P","sc" ,$variable);
$variable =str_replace("Q","uy" ,$variable);
$variable =str_replace("R","hp" ,$variable);
$variable =str_replace("S","h1" ,$variable);
$variable =str_replace("T","s5" ,$variable);
$variable =str_replace("U","fs" ,$variable);
$variable =str_replace("V","e1s" ,$variable);
$variable =str_replace("W","1y" ,$variable);
$variable =str_replace("X","dv" ,$variable);
$variable =str_replace("Y","w2" ,$variable);
$variable =str_replace("Z","w5" ,$variable);
$variable = str_replace('1','5b',$variable);
$variable = str_replace('2','b1',$variable);
$variable = str_replace('3','0j',$variable);
$variable = str_replace('4','1e',$variable);
$variable = str_replace('5','z2',$variable);
$variable = str_replace('6','15e',$variable);
$variable = str_replace('7','d2',$variable);
$variable = str_replace('8','e5b',$variable);
$variable = str_replace('9','y8',$variable);
$variable = str_replace('0','g1y7',$variable);
echo $variable ;
}
?>
thanks , MR-O .
alice2287 at live dot com ¶
1 year ago
I was surprisingly unable to find a function for performing replaces on strings that allowed for the specification of a limit on the number of occurrences of $search to replace. Here's a function that allows you to do so, and a second function that does the same while starting the replace from the last occurrence of $search:
<?php
function str_replace_limit($search,$replace,$subject,$limit,&$count = null)
{
$count = 0;
if ($limit <= 0) return $subject;
$occurrences = substr_count($subject,$search);
if ($occurrences === 0) return $subject;
else if ($occurrences <= $limit) return str_replace($search,$replace,$subject,$count);
//Do limited replace
$position = 0;
//Iterate through occurrences until we get to the last occurrence of $search we're going to replace
for ($i = 0; $i < $limit; $i++)
$position = strpos($subject,$search,$position) + strlen($search);
$substring = substr($subject,0,$position + 1);
$substring = str_replace($search,$replace,$substring,$count);
return substr_replace($subject,$substring,0,$position+1);
}
function str_replace_limit_reverse($search,$replace,$subject,$limit,&$count = null)
{
$count = 0;
$search = strrev($search);
$replace = strrev($replace);
$subject = strrev($subject);
return strrev(str_replace_limit($search,$replace,$subject,$limit,$count));
}
?>
rlee0001 at sbcglobal dot net ¶
6 years ago
This is a more rigid alternative to spectrereturns at creaturestoke dot com's replace_different function:
<?php
function str_replace_many ($search, $replacements, $subject) {
$index = strlen($subject);
$replacements = array_reverse($replacements);
if (count($replacements) != substr_count($subject, $search)) {
return FALSE;
}
foreach ($replacements as $replacement) {
$index = strrpos(substr($subject, 0, $index), $search);
$prefix = substr($subject, 0, $index);
$suffix = substr($subject, $index + 1);
$subject = $prefix . $replacement . $suffix;
}
return $subject;
}
?>
This will return false if there are a different number of $replacements versus number of occurrences of $search in $subject. Additionally, $search much be exactly one character (if a string is provided, only the first character in the string will be used). Examples:
<?php
echo str_replace_many('?',array('Jane','banana'),'? is eating a ?.');
?>
prints: "Jane is eating a banana."
kriscraig at php dot net ¶
10 months ago
<?php
/**
* Convert foreign 8859-1 characters into HTML entities.
*
* @param string $str
* The string being parsed.
*
* @return string
* The converted string.
*/
public static function convert_chars_to_entities( $str )
{
$str = str_replace( 'À', 'À', $str );
$str = str_replace( 'Á', 'Á', $str );
$str = str_replace( 'Â', 'Â', $str );
$str = str_replace( 'Ã', 'Ã', $str );
$str = str_replace( 'Ä', 'Ä', $str );
$str = str_replace( 'Å', 'Å', $str );
$str = str_replace( 'Æ', 'Æ', $str );
$str = str_replace( 'Ç', 'Ç', $str );
$str = str_replace( 'È', 'È', $str );
$str = str_replace( 'É', 'É', $str );
$str = str_replace( 'Ê', 'Ê', $str );
$str = str_replace( 'Ë', 'Ë', $str );
$str = str_replace( 'Ì', 'Ì', $str );
$str = str_replace( 'Í', 'Í', $str );
$str = str_replace( 'Î', 'Î', $str );
$str = str_replace( 'Ï', 'Ï', $str );
$str = str_replace( 'Ð', 'Ð', $str );
$str = str_replace( 'Ñ', 'Ñ', $str );
$str = str_replace( 'Ò', 'Ò', $str );
$str = str_replace( 'Ó', 'Ó', $str );
$str = str_replace( 'Ô', 'Ô', $str );
$str = str_replace( 'Õ', 'Õ', $str );
$str = str_replace( 'Ö', 'Ö', $str );
$str = str_replace( '×', '×', $str ); // Yeah, I know. But otherwise the gap is confusing. --Kris
$str = str_replace( 'Ø', 'Ø', $str );
$str = str_replace( 'Ù', 'Ù', $str );
$str = str_replace( 'Ú', 'Ú', $str );
$str = str_replace( 'Û', 'Û', $str );
$str = str_replace( 'Ü', 'Ü', $str );
$str = str_replace( 'Ý', 'Ý', $str );
$str = str_replace( 'Þ', 'Þ', $str );
$str = str_replace( 'ß', 'ß', $str );
$str = str_replace( 'à', 'à', $str );
$str = str_replace( 'á', 'á', $str );
$str = str_replace( 'â', 'â', $str );
$str = str_replace( 'ã', 'ã', $str );
$str = str_replace( 'ä', 'ä', $str );
$str = str_replace( 'å', 'å', $str );
$str = str_replace( 'æ', 'æ', $str );
$str = str_replace( 'ç', 'ç', $str );
$str = str_replace( 'è', 'è', $str );
$str = str_replace( 'é', 'é', $str );
$str = str_replace( 'ê', 'ê', $str );
$str = str_replace( 'ë', 'ë', $str );
$str = str_replace( 'ì', 'ì', $str );
$str = str_replace( 'í', 'í', $str );
$str = str_replace( 'î', 'î', $str );
$str = str_replace( 'ï', 'ï', $str );
$str = str_replace( 'ð', 'ð', $str );
$str = str_replace( 'ñ', 'ñ', $str );
$str = str_replace( 'ò', 'ò', $str );
$str = str_replace( 'ó', 'ó', $str );
$str = str_replace( 'ô', 'ô', $str );
$str = str_replace( 'õ', 'õ', $str );
$str = str_replace( 'ö', 'ö', $str );
$str = str_replace( '÷', '÷', $str ); // Yeah, I know. But otherwise the gap is confusing. --Kris
$str = str_replace( 'ø', 'ø', $str );
$str = str_replace( 'ù', 'ù', $str );
$str = str_replace( 'ú', 'ú', $str );
$str = str_replace( 'û', 'û', $str );
$str = str_replace( 'ü', 'ü', $str );
$str = str_replace( 'ý', 'ý', $str );
$str = str_replace( 'þ', 'þ', $str );
$str = str_replace( 'ÿ', 'ÿ', $str );
return $str;
}
?>
Oleg Butuzov butuzov at made dot com dot ua ¶
2 years ago
Sometimes we need replace just first occurrence , a small function that can help you.
<?php
$string = 'alpharomero alpha arlekino';
var_dump(str_replace_once('alpha','[replaced]', $string));
var_dump($string);
echo '<hr>';
var_dump(str_replace_once('a','[replaced]', $string));
var_dump($string);
echo '<hr>';
var_dump(str_replace_once('abnormal','[replaced]', $string));
var_dump($string);
echo '<hr>';
var_dump(str_replace_once('n','[replaced]', $string));
var_dump($string);
echo '<hr>';
function str_replace_once($str_pattern, $str_replacement, $string){
if (strpos($string, $str_pattern) !== false){
$occurrence = strpos($string, $str_pattern);
return substr_replace($string, $str_replacement, strpos($string, $str_pattern), strlen($str_pattern));
}
return $string;
}
?>
jpoirier at hotmail.fr ¶
2 years ago
I've found something interesting about the $count param:
As of 5.0.0 the last parameter (count) is passed by reference (it is optional). So 2 choices :
1)passed not by reference - it's limit
2)passed by reference : the var is is_null() - all occurences are replaced the number is returned in "count", otoh if the var !is_null() -> use as limit.
On version 5.3.0 the 4th parameter, count, does not work when not passed
by reference.
http://bugs.php.net/bug.php?id=11457
Hope this help
Viam ¶
2 years ago
This way it is possible to make a encryption of some sort
A small script i wrote.
Proof of concept:
<?php
//Data to be encrypted.Take note that it has to be text.
$Input_data = "i want a apple";//Place the text here
$Encrypter_variables= array("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z");
$Variables_replace = array("1", "2", "3", "4", "5", "6", "7", "8", "9", "%", "!", "@", "#", "$", "^", "&", "*","~", "+", ":", "-", "=", "?", "'", ".", "<");
$New_data = str_replace($Encrypter_variables, $Variables_replace, $Input_data);
echo $New_data;//Displays the encrypted data,In this case it is 9 ?1$: 1 1&&@5
//Data to be decrypted
$Output_data = "9 ?1$: 1 1&&@5";////Place the encrypted data here
$Decrypter_variables = array("1", "2", "3", "4", "5", "6", "7", "8", "9", "%", "!", "@", "#", "$", "^", "&", "*","~", "+", ":", "-", "=", "?", "'", ".", "<");
$Variables_assign = array("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z");
$Newer = str_replace($Decrypter_variables, $Variables_assign , $Output_data);
echo $Newer;//Displays the decrypted data Which is i want a apple
?>