Custom_Backgroun8b7c:f320:99b9:690f:4595:cd17:293a:c069ajax_background_add()  Handles Ajax request for adding custom background context to an attachment.   Description Triggers when the user adds a new background image from the Media Manager.   Source  File: wp-admin/includes/class-custom-background.php. View all references  public function ajax_background_add() {
	check_ajax_referer( 'background-add', 'nonce' );

	if ( ! current_user_can( 'edit_theme_options' ) ) {
		wp_send_json_error();
	}

	$attachment_id = absint( $_POST['attachment_id'] );
	if ( $attachment_id < 1 ) {
		wp_send_json_error();
	}

	update_post_meta( $attachment_id, '_wp_attachment_is_custom_background', get_stylesheet() );

	wp_send_json_success();
}
   Related  Uses    Uses Description      update_post_meta() wp-includes/post.php   Updates a post meta field based on the given post ID.     get_stylesheet() wp-includes/theme.php   Retrieves name of the current stylesheet.     current_user_can() wp-includes/capabilities.php   Returns whether the current user has the specified capability.     check_ajax_referer() wp-includes/pluggable.php   Verifies the Ajax request to prevent processing requests external of the blog.     wp_send_json_error() wp-includes/functions.php   Sends a JSON response back to an Ajax request, indicating failure.     absint() wp-includes/functions.php   Converts a value to non-negative integer.     wp_send_json_success() wp-includes/functions.php   Sends a JSON response back to an Ajax request, indicating success.   
    Changelog    Version Description     4.1.0 Introduced.    

    
{'path': 'public/docs/wordpress/classes/custom_background/ajax_background_add.html', 'source': 'DevDocs.IO'}