ajax顯示全圖插件

function cvpicRead($url,$type='',$picwidth='',$picheight='',$ifthumb=''){
       global $db_bbsurl,$db_picpath,$attachpath,$db_ftpweb,$code_num,$code_htm;
       $code_num++;
       $lower_url = strtolower($url);
       substr($lower_url,0,4)!='http' && $url = "$db_bbsurl/$url";
       if (strpos($lower_url,'login')!==false && (strpos($lower_url,'action=quit')!==false || strpos($lower_url,'action-quit')!==false)) {
              $url = preg_replace('/login/i','log in',$url);
       }
       $url = str_replace(array("'","'"),'',$url);
       $turl = $url;
       $wopen = 0;
       $alt = ''
       if ($ifthumb) {
              if ($db_ftpweb && !strpos($url,$attachpath)!==false) {
                     $picurlpath = $db_ftpweb;
              } else {
                     $picurlpath = $attachpath;
              }
              if (strpos($url,$picurlpath)!==false) {
                     $wopen = 1;
                     $alt = 'alt="Click Here To EnLarge"'
                     $turl = str_replace($picurlpath,"$picurlpath/thumb",$url);
              }
       }
       if ($picwidth || $picheight) {
              $wopen = !$wopen ? "if(this.width>=$picwidth)" : ''
              $onload = 'onload="'
              $picwidth  && $onload .= "if(this.width>'$picwidth')this.width='$picwidth'";
              $picheight && $onload .= "if(this.height>'$picheight')this.height='$picheight'";
              $onload .= '"'
              $code = "<a rel='lightbox' href='$url' title=''><img src='$turl' border=Ɔ'></a>";
       } else {
              $wopen = !$wopen ? "if(this.width>screen.width-461)" : ''
              $code = "<a rel='lightbox' href='$url' title=''><img src='$turl' border=Ɔ'></a>";
       }
       $code_htm[-1][$code_num]=$code;
       if ($type) {
              return $code;
       } else {
              return "<\twind_code_$code_num\t>";
       }
}