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Custom Header is a theme feature introduced with Version 2.1. Custom header is an image that is chosen as the representative image in the theme top header section.
See also Appearance Header Screen.
Since Version 3.4, themes need to use add_theme_support() in the functions.php file to support custom headers, like so:
add_theme_support( 'custom-header' );
Note that you can add default arguments using:
$defaults = array( 'default-image' => '', 'width' => 0, 'height' => 0, 'flex-height' => false, 'flex-width' => false, 'uploads' => true, 'random-default' => false, 'header-text' => true, 'default-text-color' => '', 'wp-head-callback' => '', 'admin-head-callback' => '', 'admin-preview-callback' => '', ); add_theme_support( 'custom-header', $defaults );
You must also register the header image before it can be used as a default in your theme.
Set a default header image 980px width and 60px height:
$args = array( 'width' => 980, 'height' => 60, 'default-image' => get_template_directory_uri() . '/images/header.jpg', ); add_theme_support( 'custom-header', $args );
Set a default header image and allow the site owner to upload other images:
$args = array( 'width' => 980, 'height' => 60, 'default-image' => get_template_directory_uri() . '/images/header.jpg', 'uploads' => true, ); add_theme_support( 'custom-header', $args );
Set flexible headers:
$args = array( 'flex-width' => true, 'width' => 980, 'flex-height' => true, 'height' => 200, 'default-image' => get_template_directory_uri() . '/images/header.jpg', ); add_theme_support( 'custom-header', $args );
update your header.php file to:
<img src="<?php header_image(); ?>" height="<?php echo get_custom_header()->height; ?>" width="<?php echo get_custom_header()->width; ?>" alt="" />
To add backwards compatibility for older versions, use the following code:
global $wp_version; if ( version_compare( $wp_version, '3.4', '>=' ) ) : add_theme_support( 'custom-header' ); else : add_custom_image_header( $wp_head_callback, $admin_head_callback ); endif;
Theme Support:
add_theme_support(),
remove_theme_support(),
current_theme_supports()
Theme Features:
sidebar,
menus,
post-formats,
title-tag,
custom-background,
custom-header,
custom-logo,
post-thumbnails,
automatic-feed-links,
html5,
editor-style,
content_width