[wp-trac] [WordPress Trac] #39820: Can't change header status code response

[WordPress Trac]

#39820: Can't change header status code response
--------------------------+-----------------------------
 Reporter:  skarabeq      |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  4.7.2
 Severity:  normal        |   Keywords:
  Focuses:                |
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 After update wordpress from 4.6.1 to 4.7.2 I was unpleasantly surprised.In
 ajax response like this:

 {{{#!php
 <?php
 function post_contact_form($data)
 {
     $json_return = array();
     if(!isset($data['name'])){
     $error_status_header = 422;
     status_header($error_status_header);
     $json_return['error'] =  __("Error. Please fill your name.");
     }
     else{
     $json_return['success'] = __("Form submitted.");
     }
     echo json_encode($json_return);
     wp_die();

 }
 add_action('wp_ajax_post_contact_form', 'post_contact_form');
 add_action('wp_ajax_nopriv_post_contact_form', 'post_contact_form');
 }}}


 When I try to change status header to 422 , I just got http status header
 200. In this case my fron-end logic was broked, because I check the ajax
 status code in ajax error handle.  Also I tried with status code 400 the
 result is same. Please fix it because this bug has created extremely
 inconvenience to the functionality of my site.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39820>
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