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@ 2017-07-05T16:08:26Z

<?php

define('KINT_MB', function_exists('mb_substr'));

for ($i = 0; $i < 1000; $i++) {
    if (KINT_MB) {
        
    }
}

Output
Performance
VLD
References
Branches

function_exists: documentation ( source)
define: documentation ( source)

preferences:dark modelive preview

49.5 ms | 402 KiB | 5 Q