仿微博php生成短网址，仿微博php_PHP教程

<span><!</span><span>DOCTYPE html</span><span>></span>  
<span><</span><span>html </span><span>lang</span><span>="en"</span><span>></span>  
<span><</span><span>head</span><span>></span>  
  <span><</span><span>meta </span><span>charset</span><span>="utf-8"</span> <span>/></span>  
  <span><</span><span>title</span><span>></span>urlShort<span></</span><span>title</span><span>></span>  
<span></</span><span>head</span><span>></span>  
  
<span><</span><span>body</span><span>></span>  
  <span><</span><span>form </span><span>action</span><span>="urlShort.php"</span><span> method</span><span>="post"</span><span>></span>  
    <span><</span><span>input </span><span>type</span><span>="text"</span><span> size</span><span>="16"</span><span> name</span><span>="url"</span><span> value</span><span>="输入网址"</span><span> onfocus</span><span>="if(this.value=='输入网址'){this.value='';}"</span><span> onblur</span><span>="if(this.value==''){this.value='输入网址'};"</span><span>></span>  
    <span><</span><span>input </span><span>type</span><span>="submit"</span><span> value</span><span>=" 生成 "</span> <span>/></span>  
  <span></</span><span>form</span><span>></span>  <span><</span><span>a </span><span>href</span><span>="http://hovertree.com"</span><span>></span>何问起<span></</span><span>a</span><span>></span>
<span></</span><span>body</span><span>></span>  
<span></</span><span>html</span><span>></span>  

<?<span>php  
     </span><span>header</span>("Content-Type:text/html;charset=UTF-8"<span>);    
     </span><span>function</span> base62(<span>$x</span><span>){  
        </span><span>$show</span> = ''<span>;  
        </span><span>while</span>(<span>$x</span>>0<span>){  
            </span><span>$s</span> = <span>$x</span> % 62<span>;  
            </span><span>if</span> (<span>$s</span> > 35<span>){  
                </span><span>$s</span> = <span>chr</span>(<span>$s</span> + 61<span>);  
            }</span><span>else</span> <span>if</span> (<span>$s</span> > 5 && <span>$S</span><=35<span>){  
                </span><span>$s</span> = <span>chr</span>(<span>$s</span> + 55<span>);  
            }  
            </span><span>$show</span> .= <span>$s</span><span>;  
            </span><span>$x</span> = <span>floor</span>(<span>$x</span>/62<span>);  
        }  
        </span><span>return</span> <span>$show</span><span>;  
    }  </span><span>/*</span><span> 何问起 hovertree.com </span><span>*/</span>
      
    <span>function</span> url_short(<span>$url</span><span>){  
        </span><span>$url</span> = <span>crc32</span>(<span>$url</span><span>);  
        </span><span>$result</span> = <span>sprintf</span>("%u",<span>$url</span><span>);   
        </span><span>return</span> base62(<span>$result</span><span>);  
    }  
      
    </span><span>echo</span> ("生成的新网址为：<a href='http://<span>$_POST</span>[url]'>".url_short(<span>$_POST</span>['url'])."</a>"<span>);  
</span>?>