正则-php提取页面中域名规则问题！

一套程序中需要在指定的URL页面中提取里面所有的域名，现代码如下：

  $CODE = ......;//这里是获取远程的URL内容        $temp = "//i";        preg_match_all( $temp, $CODE, $Jzz_thlld );        $Jzz_thlld = $Jzz_thlld[0];        $temp = "/ href=[\"']?http:\\/\\/www\\.([^>\"' ]+)[\"']?\\s*[^>]*>(.*)<\\/a>/si"; for ($dos_skipping = 0; $dos_skipping < sizeof( $Jzz_thlld ); $dos_skipping++ )        {            preg_match( $temp, $Jzz_thlld[$dos_skipping], $tempurl );            if ( !( $tempurl[1] != "" ) && !( strpos( $tempurl[1], "?" ) === FALSE ) && !( strpos( $tempurl[1], "&" ) === FALSE ) && !( strpos( $tempurl[1], "#" ) === FALSE ) && !( strpos( $tempurl[1], ":" ) === FALSE ) && !( strpos( $tempurl[1], " " ) === FALSE ) )            {                echo '99';                $url_temp = "www.".$tempurl[1];                if ( 0 < strpos( $url_temp, "/" ) )                {                    $url_arr = explode( "/", $url_temp );                    $url_temp = $url_arr[0];                }                if ( $Jzz_cbgsf == "" )                {                    $Jzz_cbgsf = $url_temp;                }                else if ( strpos( "||".$Jzz_cbgsf."||", "||".$url_temp."||" ) === FALSE )                {                    $Jzz_cbgsf .= "||".$url_temp;                }            }        }

上述代码中不能按照需求获取到所需要的信息，忘各位帮忙看看，改如何修改！！