note 117314 deleted from function.preg-replace by cmb
| From: | cmb@php.net | Date: | Sun, 22 Sep 2019 08:01:14 +0000 |
| Subject: | note 117314 deleted from function.preg-replace by cmb | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-212306@lists.php.net to get a copy of this message | ||
Note Submitter: safranil (at) safranil [dot] fr
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Warning, preg_replace() has an unexpected behaviour on UTF-8 strings when you use an empty regular
expression like "/()/" !
If you build your regular expression in PHP like this :
$words = array();
foreach (explode(" ", $what) as $w)
if (mb_strlen($w) > 0)
$words[] = preg_quote($w, "/");
return preg_replace('/(' . implode("|",$words) . ')/iu',
'<span class="text-maroon">\\1</span>', $text);
Always check if $words array isn't empty :
if (count($words) == 0)
return $text;