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@ 2016-11-06T09:08:51Z

<?php
$str = "1 2 3";
$newStr = preg_replace_callback("/\d+/", function($matches){
	return $matches[0] * 2;
}, $str); 
echo $newStr;

Output
Performance
VLD
References
Branches

preg_replace_callback: documentation ( source)

preferences:dark modelive previewkey bindings

80.93 ms | 1566 KiB | 5 Q