note 102144 modified in function.str-replace by danbrown
| From: | danbrown@php.net | Date: | Sat, 29 Jan 2011 14:26:06 +0000 |
| Subject: | note 102144 modified in function.str-replace by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-176492@lists.php.net to get a copy of this message | ||
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"
--was--
say you want every "a" replaced by "abba" and every "b" replaced by
"baab" in the string "ab" you do:
$search = array("a","b");
$replace = array("abba","baab");
echo str_replace($search,$replace,"ab");
that results in "abaabbaababaab" and not the expected "abbabaab"
I wrote this little snippet to solve the replacements-in-replacement problem:
function search_replace($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"
http://php.net/manual/en/function.str-replace.php