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@ 2014-09-26T09:34:18Z

<?php
$my_key = uniqid("\x00");
$var[$my_key] = TRUE;
foreach($var as $key => $val) 
{
	if ($key === $my_key) {
		echo 'You got it right';
	} else {
		echo 'You got it wrong';
	}
}

Output
Performance
VLD
References
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uniqid: documentation ( source)

preferences:dark modelive preview

32.48 ms | 402 KiB | 5 Q