PHP Weird Undefined index error

Question

I have a really frustrating issue where I cannot retrieve any of the headers. Here is my code:

$headers = getallheaders();
echo($headers["SystemTime"]); //Doesnt work
$keys = array_keys($headers);
echo($headers[$keys[4]]); //Doesnt work

Both lines produce the error 'Undefined index: SystemTime'.

I cannot for the life of me figure out why I cant get the value. If I go print_r($headers); I get this

Array
(
    [Content-Type] => application/x-www-form-urlencoded
    [Content-Length] => 0
    [Host] => localhost
    [Referer] => 
    [SystemTime] => 2012-06-26+09%3a20%3a27
)

var_dump of $headers

array(5) {
  ["Content-Type"]=>
  string(33) "application/x-www-form-urlencoded"
  ["Content-Length"]=>
  string(1) "0"
  ["Host"]=>
  string(9) "localhost"
  ["Referer"]=>
  string(0) ""
  ["SystemTime"]=>
  string(23) "2012-06-26+10%3a10%3a08"
}

var_dump of $keys

array(5) {
  [0]=>
  string(12) "Content-Type"
  [1]=>
  string(14) "Content-Length"
  [2]=>
  string(4) "Host"
  [3]=>
  string(7) "Referer"
  [4]=>
  string(10) "SystemTime"
}

foreach ($headers as $name => $value) { 
   echo "$name: $value. From Array: {$headers[$name]}\n"; 
} 

returned:

Connection: Keep-Alive. From Array: Keep-Alive
Content-Type: application/x-www-form-urlencoded. From Array: application/x-www-form-urlencoded
Content-Length: 0. From Array: 0
Host: localhost. From Array: localhost
Referer: . From Array: 

Notice:  Undefined index:  SystemTime in /clientdata/apache-www/a/d/[XXXXXX].com/www/admin/request/GetPCLicence.php on line 22
SystemTime: 2012-06-26+10%3a10%3a08. From Array: 

Im stuck and I seriously cannot figure out what is going wrong. It should work.

PS. I know that the SystemTime header is non-standard. I provide that from my http_request.

Answer 1

I got it after much help from you guys. I had a feeling that because it worked after the deserializing that maybe the encoding was different and thats why we could see it, but not touch it?

My code below gets all the headers and converts the encoding and puts it in a new array :)

Here is my 'Translation' code.

    $headersRaw = getallheaders();
    $headers = array();
    foreach($headersRaw as $key => $value)
    {
        $headers[mb_convert_encoding($key, "UTF-8")] = $value;
    }