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<?php |
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namespace Amarkal\Settings; |
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class Manager |
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{ |
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/** |
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* @var Singleton The reference to *Singleton* instance of this class |
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*/ |
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private static $instance; |
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private $pages = array(); |
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private $subpages = array(); |
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/** |
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* Returns the *Singleton* instance of this class. |
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* |
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* @return Singleton The *Singleton* instance. |
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*/ |
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public static function get_instance() |
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{ |
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if( null === static::$instance ) |
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{ |
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static::$instance = new static(); |
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} |
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return static::$instance; |
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} |
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public function add_page($args) |
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{ |
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$slug = $args['slug']; |
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if(array_key_exists($slug,$this->pages)) |
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{ |
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throw new \RuntimeException("A page with slug '$slug' has already been registered"); |
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} |
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$this->pages[$slug] = new Page($args); |
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} |
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public function add_subpage($args) |
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{ |
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$this->subpages[] = new SubPage($args); |
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} |
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public function register_settings() |
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{ |
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register_setting( 'myoption-group', 'new_option_name' ); |
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register_setting( 'myoption-group', 'some_other_option' ); |
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register_setting( 'myoption-group', 'option_etc' ); |
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} |
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/** |
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* Register styles & scripts to be enqueued by settings subpages |
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*/ |
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public function register_scripts() |
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{ |
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\wp_register_style('amarkal-settings',$this->get_url(__DIR__.'/assets/css/style.min.css')); |
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\wp_register_script('amarkal-settings',$this->get_url(__DIR__.'/assets/js/script.min.js')); |
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} |
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public function save_settings() |
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{ |
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echo 'save'; |
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\wp_die(); |
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} |
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public function reset_settings() |
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{ |
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echo 'reset'; |
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\wp_die(); |
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} |
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/** |
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* Private constructor to prevent instantiation |
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*/ |
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private function __construct() |
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{ |
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$this->init(); |
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} |
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private function init() |
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{ |
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\add_action('admin_init',array($this,'register_scripts')); |
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\add_action('wp_ajax_amarkal_settings_save', array( $this, 'save_settings')); |
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\add_action('wp_ajax_amarkal_settings_reset', array( $this, 'reset_settings')); |
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} |
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private function get_url( $path ) |
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{ |
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$url = str_replace( ABSPATH, '', $path ); |
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return esc_url_raw( site_url( $url ) ); |
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} |
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} |
Let’s assume you have a class which uses late-static binding:
The code above will run fine in your PHP runtime. However, if you now create a sub-class and call the
getSomeVariable()on that sub-class, you will receive a runtime error:In the case above, it makes sense to update
SomeClassto useselfinstead: