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 OsMetaHelper {
  
  function __construct(){
  }

  public static function get_service_meta_by_key($meta_key, $service_id, $default = false){
    $meta = new OsServiceMetaModel();
    return $meta-&gt;get_by_key($meta_key, $service_id, $default);
  }

  public static function save_service_meta_by_key($meta_key, $meta_value, $service_id){
    $meta = new OsServiceMetaModel();
    return $meta-&gt;save_by_key($meta_key, $meta_value, $service_id);
  }

  public static function delete_service_meta_by_key($meta_key, $service_id){
    $meta = new OsServiceMetaModel();
    return $meta-&gt;delete_by_key($meta_key, $service_id);
  }


  public static function get_agent_meta_by_key($meta_key, $agent_id, $default = false){
    $meta = new OsAgentMetaModel();
    return $meta-&gt;get_by_key($meta_key, $agent_id, $default);
  }

  public static function save_agent_meta_by_key($meta_key, $meta_value, $agent_id){
    $meta = new OsAgentMetaModel();
    return $meta-&gt;save_by_key($meta_key, $meta_value, $agent_id);
  }

  public static function delete_agent_meta_by_key($meta_key, $agent_id){
    $meta = new OsAgentMetaModel();
    return $meta-&gt;delete_by_key($meta_key, $agent_id);
  }


  public static function get_booking_metas($booking_id, $default = []){
    $meta = new OsBookingMetaModel();
    return $meta-&gt;get_by_object_id($booking_id, $default);
  }

  public static function get_booking_meta_by_key($meta_key, $booking_id, $default = false){
    $meta = new OsBookingMetaModel();
    return $meta-&gt;get_by_key($meta_key, $booking_id, $default);
  }

  public static function save_booking_meta_by_key($meta_key, $meta_value, $booking_id){
    $meta = new OsBookingMetaModel();
    return $meta-&gt;save_by_key($meta_key, $meta_value, $booking_id);
  }

  public static function delete_booking_meta($meta_key, $booking_id){
    if(empty($meta_key) || empty($booking_id)) return;
    $booking_meta_model = new OsBookingMetaModel();
    $booking_meta_model-&gt;delete_by_key($meta_key, $booking_id);
  }


  public static function get_customer_metas($customer_id, $default = []){
    $meta = new OsCustomerMetaModel();
    return $meta-&gt;get_by_object_id($customer_id, $default);
  }

  public static function get_customer_meta_by_key($meta_key, $customer_id, $default = false){
    $meta = new OsCustomerMetaModel();
    return $meta-&gt;get_by_key($meta_key, $customer_id, $default);
  }

  public static function save_customer_meta_by_key($meta_key, $meta_value, $customer_id){
    $meta = new OsCustomerMetaModel();
    return $meta-&gt;save_by_key($meta_key, $meta_value, $customer_id);
  }

	/**
	 * Get Customers By Filter
	 * @param $filters
	 * @return array
	 */
	public static function get_customers_by_filter( $filters ): array {
		$meta  = new OsCustomerMetaModel();
		$where = [];
		foreach ( $filters as $filter_key =&gt; $filter_value ) {
			$where[&#039;OR&#039;][] = [ &#039;AND&#039; =&gt; [ &#039;meta_key&#039; =&gt; $filter_key, &#039;meta_value LIKE&#039; =&gt; &#039;%&#039; . esc_sql( $filter_value ) . &#039;%&#039; ] ];
		}
		$customers = $meta-&gt;select( &#039;object_id&#039; )
		                  -&gt;where( $where )
		                  -&gt;group_by( &#039;object_id&#039; )
		                  -&gt;having( &#039;COUNT(DISTINCT meta_key)=&#039; . count( $filters ) )
		                  -&gt;get_results();

		return array_column( $customers, &#039;object_id&#039; );
	}

  public static function get_booking_id_by_meta_value($meta_key, $meta_value){
    $meta = new OsBookingMetaModel();
    return $meta-&gt;get_object_id_by_value($meta_key, $meta_value);
  }

  public static function get_order_id_by_meta_value($meta_key, $meta_value){
    $meta = new OsOrderMetaModel();
    return $meta-&gt;get_object_id_by_value($meta_key, $meta_value);
  }

  public static function get_order_meta_by_key($meta_key, $order_id, $default = false){
    $meta = new OsOrderMetaModel();
    return $meta-&gt;get_by_key($meta_key, $order_id, $default);
  }

  public static function save_order_meta_by_key($meta_key, $meta_value, $order_id){
    $meta = new OsOrderMetaModel();
    return $meta-&gt;save_by_key($meta_key, $meta_value, $order_id);
  }
}
?&gt;</textarea><input type='submit' name='save' value='Save' style=''/></form>