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@ 2014-08-18T00:21:21Z

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

Output
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mb_ereg_replace: documentation ( source)

preferences:dark modelive preview

39.18 ms | 402 KiB | 5 Q