PHP 清空varnish 缓存的详解(包括指定站点下的)

<?php
function clearVarnish($ip,$url,$host=null){

    $errstr = '';
    $errno = '';
    $varnist_arr = isset($host) ? $host : C('VARNISH_LIST');
    foreach ($varnist_arr as $v){
        $fp = fsockopen ($ip, 2000, $errno, $errstr, 2);
        if (!$fp) {
            return false;
        } else {
            $out = "purge.url $url \r\n";
            fputs ($fp, $out);
            $out = fgets($fp , 4096);
            fclose ($fp);
            return $out;
        }
    }
}
?>

function varnish_purge($ip, $host='', $url) {
        $errstr = '';
        $errno = '';
        $fp = fsockopen ($ip, 2000, $errno, $errstr, 2);
        if (!$fp) {
                return $errno;
        }else {
              if(!empty($host)){
                 $out = "purge req.http.host == {$host} && req.url ~ ^/$ \r\n";
              }else{
                 $out = " purge.url {$url} \r\n";
              }
              fputs ($fp, $out);
              $out = fgets($fp , 4096);
              fclose ($fp);
              return $out; 
        }
}