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 OsOffPeriodModel extends OsModel{
  var $id,
	$summary,
	$start_date,
	$end_date,
	$start_time,
	$end_time,
	$start_datetime_utc,
	$end_datetime_utc,
	$service_id,
	$agent_id,
	$location_id,
	  $server_timezone,
	$created_at,
	$updated_at;

  function __construct($id = false){
    parent::__construct();
    $this-&gt;table_name = LATEPOINT_TABLE_BLOCKED_PERIODS;
    $this-&gt;nice_names = array();

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

	public function set_utc_datetimes(bool $save = false) {
		if ( empty( $this-&gt;start_date ) || empty( $this-&gt;end_date ) || empty( $this-&gt;start_time ) || empty( $this-&gt;end_time ) ) {
			return;
		}
		$this-&gt;start_datetime_utc = $this-&gt;get_start_datetime(&#039;UTC&#039;)-&gt;format(LATEPOINT_DATETIME_DB_FORMAT);
		$this-&gt;end_datetime_utc   = $this-&gt;get_end_datetime(&#039;UTC&#039;)-&gt;format(LATEPOINT_DATETIME_DB_FORMAT);
		if ( $save ) {
			$this-&gt;update_attributes([&#039;start_datetime_utc&#039; =&gt; $this-&gt;start_datetime_utc, &#039;end_datetime_utc&#039; =&gt; $this-&gt;end_datetime_utc]);
		}
	}


	protected function before_save() {
	  $this-&gt;set_utc_datetimes();
	  $this-&gt;server_timezone = OsTimeHelper::get_wp_timezone();
	}

	public function get_start_datetime( string $set_timezone = &#039;UTC&#039;) : OsWpDateTime{
		try{
			// start_time and start_date is legacy stored in wordpress timezone
			$dateTime = new OsWpDateTime( $this-&gt;start_date . &#039; 00:00:00&#039;, OsTimeHelper::get_wp_timezone() );
			if($this-&gt;start_time &gt; 0){
				$dateTime-&gt;modify( &#039;+&#039; . $this-&gt;start_time . &#039; minutes&#039; );
			}
			if($set_timezone) $dateTime-&gt;setTimezone( new DateTimeZone( $set_timezone ) );
			return $dateTime;
		}catch(Exception $e){
			return new OsWpDateTime(&#039;now&#039;);
		}
	}

	public function get_end_datetime( string $set_timezone = &#039;UTC&#039;) : OsWpDateTime{
		try{
			// start_time and start_date is legacy stored in wordpress timezone
			$dateTime = new OsWpDateTime( $this-&gt;end_date . &#039; 00:00:00&#039;, OsTimeHelper::get_wp_timezone() );
			if($this-&gt;end_time &gt; 0){
				$dateTime-&gt;modify( &#039;+&#039; . $this-&gt;end_time . &#039; minutes&#039; );
			}
			if($set_timezone) $dateTime-&gt;setTimezone( new DateTimeZone( $set_timezone ) );
			return $dateTime;
		}catch(Exception $e){
			return new OsWpDateTime(&#039;now&#039;);
		}
	}


  protected function allowed_params($role = &#039;admin&#039;){
    $allowed_params = array(  &#039;id&#039;,
	    &#039;summary&#039;,
&#039;start_date&#039;,
&#039;end_date&#039;,
&#039;start_time&#039;,
&#039;end_time&#039;,
&#039;start_datetime_utc&#039;,
&#039;end_datetime_utc&#039;,
&#039;service_id&#039;,
&#039;agent_id&#039;,
&#039;location_id&#039;,
&#039;server_timezone&#039;,
&#039;created_at&#039;,
&#039;updated_at&#039;);
    return $allowed_params;
  }

  protected function params_to_save($role = &#039;admin&#039;){
    $params_to_save = array(&#039;id&#039;,
	    &#039;summary&#039;,
&#039;start_date&#039;,
&#039;end_date&#039;,
&#039;start_time&#039;,
&#039;end_time&#039;,
&#039;start_datetime_utc&#039;,
&#039;end_datetime_utc&#039;,
&#039;service_id&#039;,
&#039;agent_id&#039;,
&#039;location_id&#039;,
&#039;server_timezone&#039;,
&#039;created_at&#039;,
&#039;updated_at&#039;);
    return $params_to_save;
  }


  protected function properties_to_validate(){
    $validations = array(
      &#039;start_date&#039; =&gt; array(&#039;presence&#039;),
      &#039;end_date&#039; =&gt; array(&#039;presence&#039;)
    );
    return $validations;
  }

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