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@ 2014-08-06T20:02:40Z

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

Output
Performance
VLD
References
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mb_ereg_replace: documentation ( source)

preferences:dark modelive preview

44.35 ms | 402 KiB | 5 Q