Question

I have run into a slight issue when creating a WordPress plugin. The plugin is class based and the problem appears to be with the foreach call within a function. The foreach call is iterating through an array and adding options to WordPress using the options api. Any help getting this to work correctly would be appreciated.

The Array

$settings = array();
$settings['version'] = '0.1';
$settings['release'] = 'development';
$settings['license_accepted'] = 'false';

The Function

public function settings($action) {
        $supported_actions = array('install', 'update', 'uninstall');
        if (in_array($action, $supported_actions) == true) {
            foreach($settings as $setting => $value) {
                $current = 'plugin_'.$setting;
                if ($action == 'install') {
                    add_option($current, $value, null, true);
                }
                if ($action == 'update') {
                    update_option($current, $value, null, true);
                }
                if ($action == 'uninstall') {
                    delete_option($current);
                }
            }
        } else {
            return false;
        }
}

The Problem

Warning: Invalid argument supplied for foreach.

Answer 1

You need to bring the $settings variable inside the function scope. You can do that by using a argument:

$settings = array(...);
$pluginClass->settings($action, $settings);

Or use Dependency Injection (I prefer), but I think that is to difficult for you and the plugin.