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@ 2014-08-21T14:00:55Z

<?php

function isMangled($key) { 
	$key = (string)$key; 
	$arr = []; 
	$arr[$key] = null; 
	return $key !== (string)key($arr); 
}

var_dump(
	isMangled(1),
	isMangled(1.5),
	isMangled(null),
	isMangled("test"),
	isMangled("test\0")
);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
key: documentation ( source)

preferences:dark modelive preview

35.04 ms | 402 KiB | 5 Q