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@ 2014-04-01T08:29:35Z

<?php
$string = "foobar";
var_dump(isset($string[1]), isset($string[997]));
$string[1]   = null;
$string[2]   = 42;
$string[3]   = array();
$string[6]   = "!";
$string[997] = null;
var_dump(bin2hex($string));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
bin2hex: documentation ( source)

preferences:dark modelive preview

37.51 ms | 402 KiB | 5 Q