[wp-trac] [WordPress Trac] #21515: No custom header support in theme == Fatal error: Call to a member function process_default_headers() on a non-object

[WordPress Trac]

#21515: No custom header support in theme == Fatal error: Call to a member function
process_default_headers() on a non-object
------------------------------+---------------------
 Reporter:  c3mdigital        |       Owner:  ryan
     Type:  defect (bug)      |      Status:  closed
 Priority:  normal            |   Milestone:  3.4.2
Component:  Customize         |     Version:
 Severity:  normal            |  Resolution:  fixed
 Keywords:  has-patch commit  |     Focuses:
------------------------------+---------------------

Comment (by talhadev0080):

 Replying to [comment:9 talhadev0080]:
 > Replying to [comment:8 bloomhejm]:
 > > WordPress. The error message you provided indicates that there is an
 issue with the WP_Customize_Header_Image_Control class and its
 process_default_headers() method being called on a non-object. This error
 typically occurs when you attempt to use the Customizer with a theme that
 doesn't support custom headers.
 > > Here's a possible solution to handle this error by checking whether
 the WP_Customize_Header_Image_Control object exists before calling its
 methods:
 > >
 > >
 > > {{{#!php
 > > <?php
 > > if ( class_exists( 'WP_Customize_Header_Image_Control' ) ) {
 > >     $custom_image_header = new WP_Customize_Header_Image_Control(
 $wp_customize );
 > >     if ( is_object( $custom_image_header ) ) {
 > >         // Process custom header controls here
 > >     }
 > > }
 > > }}}
 > >
 > > This code snippet checks if the WP_Customize_Header_Image_Control
 class exists, and if it does, it attempts to create an instance of it.
 Then, it checks if the instance is a valid object before proceeding to
 process custom header controls.
 >
 >
 > The error occurs when a theme doesn't support custom headers, and the
 WP_Customize_Header_Image_Control class is called incorrectly. Use the
 class_exists() function and confirm the object before processing to
 resolve the issue.

 This error suggests the theme lacks support for custom headers. Add a
 check for class_exists( 'WP_Customize_Header_Image_Control' ) and validate
 the object with is_object() before using its methods to avoid the error.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/21515#comment:10>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform