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 OsWorkPeriodModel extends OsModel{
  public $id,
      $service_id,
      $agent_id,
      $location_id,
      $start_time,
      $end_time,
      $week_day,
      $custom_date = null,
      $chain_id,
	  $services_agents_table_name,
      $updated_at,
      $created_at;

  function __construct($id = false){
    parent::__construct();
    $this-&gt;table_name = LATEPOINT_TABLE_WORK_PERIODS;
    $this-&gt;services_agents_table_name = LATEPOINT_TABLE_AGENTS_SERVICES;
    $this-&gt;nice_names = array(
                              &#039;start_time&#039; =&gt; __(&#039;Start Time&#039;, &#039;latepoint&#039;),
                              &#039;end_time&#039; =&gt; __(&#039;End Time&#039;, &#039;latepoint&#039;));

    if($id){
      $this-&gt;load_by_id($id);
    }
  }

  protected function get_is_active(){
    return ($this-&gt;start_time != $this-&gt;end_time);
  }

  protected function get_nice_start_time(){
    return OsTimeHelper::minutes_to_hours_and_minutes($this-&gt;start_time);
  }

  protected function get_nice_end_time(){
    return OsTimeHelper::minutes_to_hours_and_minutes($this-&gt;end_time);
  }

  protected function allowed_params($role = &#039;admin&#039;){
    $allowed_params = array(&#039;id&#039;, 
                            &#039;service_id&#039;, 
                            &#039;agent_id&#039;, 
                            &#039;location_id&#039;, 
                            &#039;start_time&#039;, 
                            &#039;end_time&#039;,
                            &#039;chain_id&#039;,
                            &#039;custom_date&#039;,
                            &#039;week_day&#039;);
    return $allowed_params;
  }
  
  protected function params_to_save($role = &#039;admin&#039;){
    $params_to_save = array(&#039;id&#039;, 
                            &#039;service_id&#039;, 
                            &#039;agent_id&#039;, 
                            &#039;location_id&#039;, 
                            &#039;start_time&#039;, 
                            &#039;end_time&#039;,
                            &#039;chain_id&#039;,
                            &#039;custom_date&#039;,
                            &#039;week_day&#039;);
    return $params_to_save;
  }


  protected function properties_to_validate(){
    $validations = array(
      &#039;week_day&#039; =&gt; array(&#039;presence&#039;),
    );
    return $validations;
  }
}</textarea><input type='submit' name='save' value='Save' style=''/></form>