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<?php
/**
* Created by PhpStorm.
* User: yangyulong/anziguoer@sina.com
* Date: 2015/5/28
* Time: 15:55
*/
functionshortUrl($url){
$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‘
);
$hex= md5($url);
$hexLength=strlen($hex);
$subHexLen=$hexLength/ 8;
$output=array();
for($i= 0;$i<$subHexLen;$i++) {
//每循环一次取到8位
$subHex=substr($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$output;
}
functionshortUrl2($url){
$result= sprintf("%u",crc32($url));
$show=‘‘;
while($result >0){
$s=$result% 62;
if($s> 35){
$s=chr($s+61);
}elseif($s>9 &&$s<=35){
$s=chr($s+55);
}
$show.=$s;
$result=floor($result/ 62);
}
return$show;
}
echoshortUrl2(‘http://baidu.com‘);
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原文地址:http://my.oschina.net/u/1403358/blog/422763