note 92548 modified in function.preg-replace-callback by danbrown
| From: | danbrown@php.net | Date: | Wed, 29 Jul 2009 02:32:00 +0000 |
| Subject: | note 92548 modified in function.preg-replace-callback by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-158852@lists.php.net to get a copy of this message | ||
When you use preg_replace_callback in a class and have the callback function as a private method of
that class, you need to set the callback function name like className::CallBack.
self::CallBack does not work and returns an error:
"Cannot call method self::CallBack() or method does not exist"!
<?php
class myClass{
public function parsetext($text){
// parses text and sets literals A - C to lower case
// this works
return preg_replace_callback('|([a-c])|i', 'myClass::preg_tolower',
$text);
}
public function parsefail($text){
// parses text and sets literals A - C to lower case
// this fails
return preg_replace_callback('|([a-c])|i', 'self::preg_tolower', $text);
}
private static function preg_tolower($matches){
return strtolower($matches[1]);
}
}
$parser = new myClass;
echo $parser->parsetext('ABCDEFGH');
// echoes abcDEFGH
echo $parser->parsefail('ABCDEFGH');
// throws the error
?>
--was--
When you use preg_replace_callback in a class and have the callback function as a private method of
that class, you need to set the callback function name like className::CallBack.
self::CallBack does not work and returns an error:
"Cannot call method self::CallBack() or method does not exist"!
<?php
class myClass{
public function parsetext($text){
// parses text and sets literals A - C to lower case
// this works
return preg_replace_callback('|([a-c])|i', 'myClass::preg_tolower',
$text);
}
public function parsefail($text){
// parses text and sets literals A - C to lower case
// this fails
return preg_replace_callback('|([a-c])|i', 'self::preg_tolower', $text);
}
private static function preg_tolower($matches){
return strtolower($matches[1]);
}
}
$parser = new myClass;
echo $parser->parsetext('ABCDEFGH');
// echoes abcDEFGH
echo $parser->parsefail('ABCDEFGH');
// throws the error
http://php.net/manual/en/function.preg-replace-callback.php