var dump

array (size=36)
  'id' => int 50
  'parent_id' => int 0
  'status' => string 'processing' (length=10)
  'currency' => string 'IRT' (length=3)
  'version' => string '3.1.2' (length=5)
  'prices_include_tax' => boolean false
  'date_created' => 
    object(WC_DateTime)[8439]
      protected 'utc_offset' => int 0
      public 'date' => string '2017-09-16 11:57:45.000000' (length=26)
      public 'timezone_type' => int 3
      public 'timezone' => string 'Atlantic/Azores' (length=15)
  'date_modified' => 
    object(WC_DateTime)[8475]
      protected 'utc_offset' => int 0
      public 'date' => string '2017-09-16 11:57:57.000000' (length=26)
      public 'timezone_type' => int 3
      public 'timezone' => string 'Atlantic/Azores' (length=15)
  'discount_total' => string '0' (length=1)
  'discount_tax' => string '0' (length=1)
  'shipping_total' => string '0' (length=1)
  'shipping_tax' => string '0' (length=1)
  'cart_tax' => string '0' (length=1)
  'total' => string '2000.00' (length=7)
  'total_tax' => string '0' (length=1)
  'customer_id' => int 2
  'order_key' => string 'wc_order_59bd11b97ab94' (length=22)
  'billing' => 
    array (size=11)
      'first_name' => string 'sam' (length=8)
      'last_name' => string 'xxxx' (length=14)
      'company' => string '' (length=0)
      'address_1' => string 'sdafafasdawwqe' (length=24)
      'address_2' => string '' (length=0)
      'city' => string 'ESF' (length=12)
      'state' => string 'ESF' (length=3)
      'postcode' => string '96785654345' (length=11)
      'country' => string 'IR' (length=2)
      'email' => string 't@gmail.com' (length=11)
      'phone' => string '' (length=0)
  'shipping' => 
    array (size=9)
      'first_name' => string '' (length=0)
      'last_name' => string '' (length=0)
      'company' => string '' (length=0)
      'address_1' => string '' (length=0)
      'address_2' => string '' (length=0)
      'city' => string '' (length=0)
      'state' => string '' (length=0)
      'postcode' => string '' (length=0)
      'country' => string '' (length=0)
  'payment_method' => string 'payir' (length=5)
  'payment_method_title' => string 'درگاه پرداخت و کیف پول الکترونیک Pay.ir' (length=66)
  'transaction_id' => string '131' (length=3)
  'customer_ip_address' => string '::1' (length=3)
  'customer_user_agent' => string 'mozilla/5.0 (windows nt 10.0; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/58.0.3029.81 safari/537.36' (length=114)
  'created_via' => string 'checkout' (length=8)
  'customer_note' => string '' (length=0)
  'date_completed' => null
  'date_paid' => 
    object(WC_DateTime)[8479]
      protected 'utc_offset' => int 0
      public 'date' => string '2017-09-16 11:57:57.000000' (length=26)
      public 'timezone_type' => int 3
      public 'timezone' => string 'Atlantic/Azores' (length=15)
  'cart_hash' => string 'afeffdea49c7ccc24be2ec6410a437d8' (length=32)
  'number' => string '50' (length=2)
  'meta_data' => 
    array (size=1)
      0 => 
        object(stdClass)[8481]
          public 'id' => int 1458
          public 'key' => string '_billing_mobile' (length=15)
          public 'value' => string '09140011840' (length=11)
  'line_items' => 
    array (size=1)
      26 => 
        object(WC_Order_Item_Product)[8434]
          protected 'extra_data' => 
            array (size=9)
              ...
          protected 'data' => 
            array (size=11)
              ...
          protected 'cache_group' => string 'order-items' (length=11)
          protected 'meta_type' => string 'order_item' (length=10)
          protected 'object_type' => string 'order_item' (length=10)
          protected 'id' => int 26
          protected 'changes' => 
            array (size=0)
              ...
          protected 'object_read' => boolean true
          protected 'default_data' => 
            array (size=11)
              ...
          protected 'data_store' => 
            object(WC_Data_Store)[8480]
              ...
          protected 'meta_data' => 
            array (size=0)
              ...
  'tax_lines' => 
    array (size=0)
      empty
  'shipping_lines' => 
    array (size=0)
      empty
  'fee_lines' => 
    array (size=0)
      empty
  'coupon_lines' => 
    array (size=0)
      empty