PHP网址缩短代码(生成短网址)

function shorturl($input) {

  $base32 = 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', '0', '1', '2', '3', '4', '5'

    );

  $hex = md5($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 = 0x0000001F & $int;

      $out .= $base32[$val];

      $int = $int >> 5;

    }

    $output[] = $out;

  }

  return $output;

}

Sample code to test/use the above function:

$input = 'http://www.111cn.net /1';

$output = shorturl($input);

echo "Input  : $inputn";

echo "Output : {$output[0]}n";

echo "         {$output[1]}n";

echo "         {$output[2]}n";

echo "         {$output[3]}n";

echo "n";

$input = 'http://www.111cn.net /2';

$output = shorturl($input);

echo "Input  : $inputn";

echo "Output : {$output[0]}n";

echo "         {$output[1]}n";

echo "         {$output[2]}n";

echo "         {$output[3]}n";

echo "n";

Output:

Input : http://www.111cn.net /1

Output : h0xg4r

bdr3tw

osk2d3

4azfqa

Input : http://www.111cn.net /2

Output : tm5kxb

ceoj2s

yw3dvl

nrmrxl