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@ 2015-12-25T10:47:30Z

<?php
$a = $b = true;

function onlyA() {
    return ! $a;
}

function onlyB() {
    return $b;
}

var_dump(onlyA());

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

48.83 ms | 402 KiB | 5 Q