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@ 2016-11-21T08:44:53Z

<?php

$pattern = '';
$host = '';

if (preg_match($pattern, $host)) {
    echo 'Matched';
} else {
    echo 'Not matched.';
}

Output
Performance
VLD
References
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preg_match: documentation ( source)

preferences:dark modelive preview

54.35 ms | 402 KiB | 5 Q