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@ 2014-06-15T05:06:10Z

<?php
$str = "null";
$arr = get_defined_vars();
foreach($arr as $k => $v) {
    if (is_array($v) ) {

        echo in_array('str',$v);
    }
}

Output
Performance
VLD
References
Branches

get_defined_vars: documentation ( source)
in_array: documentation ( source)

preferences:dark modelive preview

42.56 ms | 402 KiB | 5 Q