短URL

function shorturl($input) {

$base62 = array (

'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',

'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',

'q', 'r', 's', 't', 'u', 'v', 'w', 'x',

'y', 'z', 'A','B','C','D','E','F','G',

'H','I','J','K','L','M','N','O','P',

'Q','R','S','T','U','V','W','X','Y',

'Z','0', '1', '2', '3', '4', '5','6','7','8','9'

);

$hex = md5($input);

$hexLen = strlen($hex);

$subHexLen = $hexLen / 8;

$output = array();

for ($i = 0; $i < $subHexLen; $i++) {

$subHex = substr ($hex, $i * 8, 8);

$int = 0x3FFFFFFF & (1 * ('0x'.$subHex));

$out = '';

for ($j = 0; $j < 6; $j++) {

$val = 0x0000003D & $int;

$out .= $base62[$val];

$int = $int >> 5;

}

$output[] = $out;

}

return $output;

}

$ret= shorturl('http://www.google.com');

print_r($ret);