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@ 2014-02-07T21:06:38Z

<?php
$subject = "Hello foo";

echo preg_replace_callback(
    '/\bfoo\b/i',

    function ($match)
    {
        return 'bar';
    },

    $subject
 );

Output
Performance
VLD
References
Branches

preg_replace_callback: documentation ( source)

preferences:dark modelive preview

39.94 ms | 402 KiB | 5 Q