array_merge() [function.array-merge]: Argument #1 is not an array

Question

I am trying to use Google-API-PHP-Client and its base class is throwing following error:

Severity: Warning

Message: array_merge() [function.array-merge]: Argument #1 is not an array

Filename: libraries/Google_Client.php

Line Number: 107

Code around like 107 is something like:

public function __construct($config = array()) {
    global $apiConfig;
    $apiConfig = array_merge($apiConfig, $config);
    self::$cache = new $apiConfig['cacheClass']();
    self::$auth = new $apiConfig['authClass']();
    self::$io = new $apiConfig['ioClass']();
  }

I understand that global $apiConfig is not initialized as array that's why array_merge is throwing error. But when I change it to global $apiConfig = array();, got another error Parse error: syntax error, unexpected '=', expecting ',' or ';' in C:\Softwares\xampp\htdocs\testsaav\application\libraries\Google_Client.php on line 106

I am using Codeigniter 2.3 with XAMPP which has PHP 5.3

John Conde · Accepted Answer · 2013-01-25 02:01:51Z

2

Initialize your array in your function (if necessary)

public function __construct($config = array()) {
    global $apiConfig;
    $apiConfig = (isset($apiConfig) && is_array($apiConfig)) ? $apiConfig : array(); // initialize if necessary
    $apiConfig = array_merge($apiConfig, $config);
    self::$cache = new $apiConfig['cacheClass']();
    self::$auth = new $apiConfig['authClass']();
    self::$io = new $apiConfig['ioClass']();
  }

answered Jan 25, 2013 at 2:01

John Conde

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5 Comments

Himanshu Yadav Over a year ago

It worked for me. Thanks. Can you please explain why global $apiConfig = array(); didn't work at the first place?

John Conde Over a year ago

You can't assign a value to a variable while declaring it global.

Erik Nedwidek Over a year ago

Because you were trying to declare you wanted the global at the same time you were wiping it out. Secondly this is Google's code that you are modifying. Probably not the solution that you want. You need to find out why the code is not loading the $apiConfig created in config.php

Himanshu Yadav Over a year ago

I guess because Google's API is not compatible with PHP 5.3. Everything worked fine after this change.

Erik Nedwidek Over a year ago

What you've done is just to bypass the fact that the configuration was not loaded. The Google wiki says the requirements are PHP 5.3 or greater.

Erik Nedwidek · Accepted Answer · 2013-01-25 02:39:24Z

Check your server logs and see if there is an error related to the require_once('config.php') in Google_Client.php (If the file wasn't found, the script should have stopped).

When you do your require_once('Google_Client.php'), the following code is executed from that file. After you do your require, $apiConfig should be visible to your script.

// hack around with the include paths a bit so the library 'just works'
set_include_path(dirname(__FILE__) . PATH_SEPARATOR . get_include_path());

require_once "config.php";
// If a local configuration file is found, merge it's values with the default configuration
if (file_exists(dirname(__FILE__)  . '/local_config.php')) {
  $defaultConfig = $apiConfig;
  require_once (dirname(__FILE__)  . '/local_config.php');
  $apiConfig = array_merge($defaultConfig, $apiConfig);
}

Note that you do not touch config.php. If you need to override anything in there, you create local_config.php.

From my system with PHP 5.3 I used this script. The script as show below throws no errors. Unsetting the $apiConfig replicates your error.

<?php

require_once('src/Google_Client.php');

print_r($apiConfig);
// uncommenting the next line replicates issue.
//unset($apiConfig);
$api = new Google_Client();

?>

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