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@ 2014-05-15T14:50:27Z

<?php

function logMe($string)
{
    global $foo;
    if (isset($foo)) {
        return $foo . $string;
    }
}

var_dump(logMe('string'));

$foo = 'bar';

var_dump(logMe('string'));

Output
Performance
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References
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var_dump: documentation ( source)

preferences:dark modelive preview

43.48 ms | 402 KiB | 5 Q