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@ 2017-10-25T02:47:31Z

<?php

$string = "doamin\username";
$newStr = str_replace('`\`','`\\\\`',$string);

echo $newStr;

Output
Performance
VLD
References
Branches

str_replace: documentation ( source)

preferences:dark modelive previewkey bindings

131.49 ms | 1466 KiB | 5 Q