Undefined index X-Api-Key in cake php - php

Question

I am trying to post some data in json format and passing 'X-Api-Key' as header key. But my code always give notice of undefined index x-api-key. And no data is stored.
I am using cake php 2.x
Here is my php code
public function checkXAPI() {
$headers = apache_request_headers();
//X-Api-key unidentified
if($headers['X-Api-Key'] == 'AB5433GMDF657VBB'){
return true;
} else {
return true;
}
}
public function beforeFilter(){
$this->Auth->Allow(array('checkXAPI','Registerowner'));
$headersNotAllowed = array('login', 'checkXAPI', 'register');
$noSecurityAllowed = array('register');
if(!in_array($this->request->action, $noSecurityAllowed)){
$checkXAPI = $this->checkXAPI();
if (!$checkXAPI) {
$message = array(
'status' => false,
'message' => __('wrong X-API')
);
echo json_encode($message);
exit;
} else {
$headers = apache_request_headers();
if(!in_array($this->request->action, $headersNotAllowed)){
if (isset($headers['Id'])) {
$checkUserToken = $this->checkUserToken();
if (!$checkUserToken) {
$message = array(
'status' => false,
'message' => __('wrong User ID and User token combination')
);
echo json_encode($message);
exit;
}
}
}
}
}
}

Answer 1

Use $this->request->header('X-Api-Key') instead:
public function checkXAPI() {
return $this->request->header('X-Api-Key') === 'AB5433GMDF657VBB';
}