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@ 2015-02-20T12:46:49Z

<?php

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

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

echo $b;

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

58.9 ms | 402 KiB | 5 Q