PHP generates short URL, imitates Weibo short URL generation code

 urlShort-php generated Short URL_bbs.it-home.org_Script Academy provides

2 to generate the code for the PHP short URL.

 header("Content-Type:text/html;charset=UTF-8");
 function base62($x){
 $show = '';
 while($x> ;0){
 $s = $x % 62;
 if ($s > 35){
 $s = chr($s + 61);
 }else if ($s > 5 && $S<= 35){
 $s = chr($s + 55);
 }
 $show .= $s;
 $x = floor($x/62);
 }
 return $show;
 }

 function url_short ($url){
 $url = crc32($url);
 $result = sprintf("%u",$url);
 return base62($result);
 }

 echo ("The generated short URL is ：".url_short($_POST['url'])."");