Detailed explanation of clearing Varnish cache in PHP (including those under specified sites)_PHP Tutorial

There is no way to clear the folder contents. You can only clear the specified link cache

Copy code The code is as follows:

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; s( $fp , 4096);
fclose ($fp);
return $out;
}
}
}
?>




It should be noted that:

The incoming url cannot take parameters, such as: www.baidu.com/?tn=sougouBecause purge.url is cleared after regular rules The expression can be changed to www.baidu.com/(.?)sougou and that's it. When a varnish caches the content of multiple sites and needs to clear the specified site URL or simply clear the site homepage, purge must be used instead of purge.url


Copy code

The code is as follows: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 ~ ^/$ rn";
                                                                                           " purge.url {$url} rn";
                                                                                                                     close ($fp);
             return $out;                                                            



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Unable to clear the folder contents, you can only clear the specified link cache. Copy the code as follows: ?php function clearVarnish($ip ,$url,$host=null){ $errstr = ''; $errno = ''; $varnist_arr = isse...