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@ 2014-08-06T20:10:20Z

<?php
$heart = "love";
$pat = "[♥]+";
$sub = "heart";
echo eval(mb_ereg_replace( $pat, $sub, "I \$♥ PHP" ));

Output
Performance
VLD
References
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mb_ereg_replace: documentation ( source)

preferences:dark modelive preview

43.3 ms | 402 KiB | 5 Q