[SOLVED] Search in header name ?

[miless]

Is there a way to search inside the header name, rather than the header output ?

 

For example: I want to know if the client has sent any headers with the word "forwarded" in them.

[trq]

Providing your using apache apache_request_headers() will return an array of all request headers sent by the client.

[miless]

Unfortunately, my host has it installed as CGI.

 

I am most concerned by HTTP call response times. I do not know how headers work exactly but does this script call the browser (or user-agent) every time it checks for each header ? If so that is quite slow, can it be done quicker ?

 

if ( !empty($_SERVER["HTTP_CLIENT_IP"]) ){
$ip = $_SERVER["HTTP_CLIENT_IP"];
}elseif ( !empty($_SERVER["HTTP_X_FORWARDED_FOR"]) ){
$ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
}elseif ( !empty($_SERVER["HTTP_FORWARDED"]) ){
$ip = $_SERVER["HTTP_FORWARDED"];
}elseif ( !empty($_SERVER["HTTP_FORWARDED_FOR"]) ){
$ip = $_SERVER["HTTP_FORWARDED_FOR"];
}elseif ( !empty($_SERVER["HTTP_X_FORWARDED"]) ){
$ip = $_SERVER["HTTP_X_FORWARDED"];
}elseif ( !empty($_SERVER["X_FORWARDED_FOR"]) ){
$ip = $_SERVER["X_FORWARDED_FOR"];
}elseif ( !empty($_SERVER["X_FORWARDED_FOR"]) ){
$ip = $_SERVER["X_Forwarded_For"];
}elseif ( !empty($_SERVER["HTTP_VIA"]) ){
$ip = $_SERVER["HTTP_VIA"];
}elseif ( !empty($_SERVER["HTTP_X_COMING_FROM"]) ){
$ip = $_SERVER["HTTP_X_COMING_FROM"];
}elseif ( !empty($_SERVER["HTTP_COMING_FROM"]) ){
$ip = $_SERVER["HTTP_COMING_FROM"];
}else{
$ip = $_SERVER["REMOTE_ADDR"];
}

[trq]

but does this script call the browser (or user-agent) every time it checks for each header ?

 

No, headers are sent from the client to the server once upon each request.