gist: 10590


  
    
      HTTP Cookie header parser
    
    
      
      
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              <?php
/*
Ben's quick and dirty HTTP cookie header parser
 
HTTP cookie headers are actually quite tricky to parse, because the expiry date often contains a comma, and commas are supposed to be the delimiter between individual cookies.
 
This parser cheats by splitting the cookie header based on the equals sign, and reconstructing the key pairs in a loop.
 
This sample code doesn't support all cookie properties, but it ought to be trivial to add more. It hasn't been tested a great deal, so use at your own risk.
 
I originally wrote this in Objective-C for ASIHTTPRequest (http://allseeing-i.com/asi-http-request) before I discovered Apple's function that does this for you (DOH!), but I'd guess this PHP port is likely to be more useful to more people. Even if you hate PHP with a passion, you ought to be able to read it well enough to port it to whatever language you like.
 
More random stuff at:
 
http://www.allseeing-i.com
 
*/
 
$example_cookie_header = "ASIHTTPRequestTestCookie=This+is+the+value; expires=Sat, 26-Jul-2008 17:00:42 GMT; path=/tests; domain=allseeing-i.com, PHPSESSID=6c951590e7a9359bcedde25cda73e43c; path=/";
 
print_r(parse_cookies($example_cookie_header));
 
function parse_cookies($header) {
  
  $cookies = array();
  
  $cookie = new cookie();
  
  $parts = explode("=",$header);
  for ($i=0; $i< count($parts); $i++) {
    $part = $parts[$i];
    if ($i==0) {
      $key = $part;
      continue;
    } elseif ($i== count($parts)-1) {
      $cookie->set_value($key,$part);
      $cookies[] = $cookie;
      continue;
    }
    $comps = explode(" ",$part);
    $new_key = $comps[count($comps)-1];
    $value = substr($part,0,strlen($part)-strlen($new_key)-1);
    $terminator = substr($value,-1);
    $value = substr($value,0,strlen($value)-1);
    $cookie->set_value($key,$value);
    if ($terminator == ",") {
      $cookies[] = $cookie;
      $cookie = new cookie();
    }
    
    $key = $new_key;
  }
  return $cookies;
}
 
class cookie {
  public $name = "";
  public $value = "";
  public $expires = "";
  public $domain = "";
  public $path = "";
  public $secure = false;
  
  public function set_value($key,$value) {
    switch (strtolower($key)) {
      case "expires":
        $this->expires = $value;
        return;
      case "domain":
        $this->domain = $value;
        return;
      case "path":
        $this->path = $value;
        return;
      case "secure":
        $this->secure = ($value == true);
        return;
    }
    if ($this->name == "" && $this->value == "") {
      $this->name = $key;
      $this->value = $value;
    }
  }
}