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@ 2015-03-19T15:32:17Z

<?php

$x = acos(8);

if($x > 0 && $x < 0) {
    echo 'success';
} else {
    echo 'failure';
}

Output
Performance
VLD
References
Branches

acos: documentation ( source)

preferences:dark modelive preview

48.38 ms | 402 KiB | 5 Q