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@ 2014-02-24T17:25:48Z

<?php
if(preg_match('/Gecko/', $_SERVER['HTTP_USER_AGENT'])) {
    echo "Damn beast, gecko!";
} else {
    echo "Damn you!";
}

Output
Performance
VLD
References
Branches

preg_match: documentation ( source)

preferences:dark modelive preview

45.89 ms | 402 KiB | 5 Q