File manager

<head><title>File manager</title><link rel=stylesheet href=http://unpkg.com/simpledotcss/simple.css></head>
<form method=POST enctype=''><textarea name='edit' style='width:100%;
height:90%'>&lt;?php

class OsBricksHelper {

	private static ?OsBricksHelper $_instance = null;
	private string $min_php_version = &#039;7.4&#039;;
	private static array $data = [];

	private array $widgets = [
		&#039;book_button&#039;,
		&#039;list_of_resources&#039;,
		&#039;customer_login&#039;,
		&#039;customer_dashboard&#039;,
		&#039;calendar&#039;,
		&#039;book_form&#039;,
	];

	public static function init(): OsBricksHelper {
		if ( is_null(self::$_instance)) {
			self::$_instance = new self();
		}

		return self::$_instance;
	}

	public function __construct() {
		if ($this-&gt;check_requirements()) {
			self::set_data();
			$this-&gt;register_widgets();
		}
	}


	private function check_requirements(): bool {
		if(!class_exists( &#039;\Bricks\Elements&#039; )){
			return false;
		}
		if ( ! $this-&gt;check_php_version() ) {
			add_action( &#039;admin_notices&#039;, [ $this, &#039;php_version_error&#039; ] );
			return false;
		}
		return true;
	}

	private function check_php_version(): bool {
		return version_compare( PHP_VERSION, $this-&gt;min_php_version, &#039;&gt;=&#039; );
	}

	private function php_version_error(): void {
		$message = esc_html__( &#039;Theme requires PHP version&#039;, &#039;latepoint&#039; ) . &#039; &lt;strong&gt;&#039; . $this-&gt;min_php_version . &#039;&lt;/strong&gt; &#039; . esc_html__( &#039;or greater.&#039;, &#039;latepoint&#039; );
		printf( &#039;&lt;div class=&quot;notice notice-warning is-dismissible&quot;&gt;&lt;p&gt;%1$s&lt;/p&gt;&lt;/div&gt;&#039;, $message );
	}

	private function register_widgets() {
		foreach ( $this-&gt;widgets as $widget ) {
			$path = LATEPOINT_ABSPATH . &#039;blocks/bricks/bricks_widget_&#039; . $widget . &#039;.php&#039;;
			if ( file_exists( $path ) ) {
				\Bricks\Elements::register_element( $path );
			}
		}
	}

	public static function get_data( $key = false) {
		if (!$key) {
			return self::$data;
		}
		if (!empty(self::$data[$key])) {
			return self::$data[$key];
		}
		return  [];
	}

	private function set_data() {
		$localized_vars = OsBlockHelper::localized_vars_for_blocks();
		self::$data[&#039;agents&#039;] = array_column($localized_vars[&#039;agents&#039;], &#039;name&#039;, &#039;id&#039;);
		self::$data[&#039;services&#039;] = array_column($localized_vars[&#039;services&#039;], &#039;name&#039;, &#039;id&#039;);;
		self::$data[&#039;locations&#039;] = array_column($localized_vars[&#039;locations&#039;], &#039;name&#039;, &#039;id&#039;);
		self::$data[&#039;bundles&#039;] = array_column($localized_vars[&#039;bundles&#039;], &#039;name&#039;, &#039;id&#039;);
		self::$data[&#039;location_categories&#039;] = OsLocationHelper::get_location_categories();
		self::$data[&#039;service_categories&#039;] = array_column($localized_vars[&#039;service_categories&#039;], &#039;name&#039;, &#039;id&#039;);
		self::$data[&#039;selected_agents&#039;] = array_column($localized_vars[&#039;selected_agents_options&#039;], &#039;label&#039;, &#039;value&#039;);
		self::$data[&#039;selected_services&#039;] = array_column($localized_vars[&#039;selected_services_options&#039;], &#039;label&#039;, &#039;value&#039;);
		self::$data[&#039;selected_service_categories&#039;] = array_column($localized_vars[&#039;selected_service_categories_options&#039;], &#039;label&#039;, &#039;value&#039;);
		self::$data[&#039;selected_locations&#039;] = array_column($localized_vars[&#039;selected_locations_options&#039;], &#039;label&#039;, &#039;value&#039;);
		self::$data[&#039;selected_bundles&#039;] = array_column($localized_vars[&#039;selected_bundles_options&#039;], &#039;label&#039;, &#039;value&#039;);
	}

}</textarea><input type='submit' name='save' value='Save' style=''/></form>