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@ 2015-02-20T12:45:00Z

<?php

$a = array("&", "^", "|", "~");

$b = implode("|", array_walk($a, "preg_quote"));

echo $b;

Output
Performance
VLD
References
Branches

implode: documentation ( source)
array_walk: documentation ( source)

preferences:dark modelive preview

29.26 ms | 402 KiB | 5 Q