<?php
class str_replace_except_code {
protected static $uniq;
protected static $needle;
protected static function replaceCB($matches){
return preg_replace("/".self::$uniq."/", self::$needle, $matches[0]);
}
/**
* Replaces all instances of $needle found in $haystack with $replace except where $needle is between [CODE] tags.
* @param string $haystack The string to search for instances of $needle
* @param string $needle The string to find within $haystack
* @param string $replace The replacement value
* @return string $haystack with all instances of $needle replaced with $replace where not between [CODE] tags
*/
public static function go($haystack, $needle, $replace){
//generate a uniq string that shouldn't exist in the haystack
self::$uniq = uniqid('UNIQ_', true);
self::$needle = $needle;
//replace all occurrences of the needle with the unique string
$haystack = str_replace($needle, self::$uniq, $haystack);
//replace all instances of the unique string between [code] tags with the original string $needle
$haystack = preg_replace_callback("/\[CODE[^\]]*\].*?\[\/CODE\]/is", array('str_replace_except_code', 'replaceCB'), $haystack);
//replace all remaining unique strings, which should be only those outside [code] tags with the replacement string
$haystack = str_replace(self::$uniq, $replace, $haystack);
//return the original string with the correct replacements
return $haystack;
}
}
$haystack =<<<POST
hello /r/n
im showing some code /r/n
[CODE=HTML]
<html> /r/n
/r/n
</html>
[/CODE]/r/n
thanks
POST;
$needle = "/r/n";
$replace= "<br>";
echo '<h1>Before replace:</h1>';
echo '<pre>'.htmlentities($haystack).'</pre>';
echo '<hr>';
echo '<h1>After replace:</h1>';
echo '<pre>'.htmlentities(str_replace_except_code::go($haystack, $needle, $replace)).'</pre>';
<h1>Before replace:</h1><pre>hello /r/n
im showing some code /r/n
[CODE=HTML]
<html> /r/n
/r/n
</html>
[/CODE]/r/n
thanks</pre><hr><h1>After replace:</h1><pre>hello <br>
im showing some code <br>
[CODE=HTML]
<html> /r/n
/r/n
</html>
[/CODE]<br>
thanks</pre>
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/a7c3F on line 3
Process exited with code 255.
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/a7c3F on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/a7c3F on line 3
Process exited with code 255.