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@ 2014-10-23T10:39:26Z

<?php

for(
	$K = 'Key',
	$_ = range($i = $j = 0, $n = 255);
	$i <= $n;
	$j += $_[$i] + ord($K{$i % strlen($K)}),
	_($_[
		$j &= $n
	], $_[
		$i++
	])
);

for($j = 0,
    $i = 1;;
    $j += $_[
        $i &= $n
    ],
    _($_[
        $j &= $n
    ], $_[$i]),
    printf('%x', $_[
        (
	        $_[
	            $i++
	        ] + $_[$j]
        ) & $n
    ])
);

function _(&$i, &$j){
	$x = $i;
	$i = $j;
	$j = $x;
}

Output
Performance
VLD
References
Branches

range: documentation ( source)
ord: documentation ( source)
printf: documentation ( source)

preferences:dark modelive preview

46.17 ms | 402 KiB | 5 Q