描述:
自定义背景,需要参数$header_callback callback来显示“wp_head”操作的内容。参数$admin_header_callback callback将被添加到custom_background类中,并添加到“admin_menu”操作中。
用法:
<?php add_custom_background( $header_callback, $admin_header_callback, $admin_image_div_callback ) ?>
参数:
$header_callback
(callback) (可选) 调用‘wp_head’
默认值: ''
$admin_header_callback
(callback) (可选) 在自定义后台管理屏幕上调用。
默认值: ''
$admin_image_div_callback
(callback) (可选) 在自定义后台管理屏幕上输出自定义后台图像div。可选。
默认值: ''
返回值:
(无效)
此函数不返回值。
源文件:
/**
* Add callbacks for background image display.
*
* @since 3.0.0
* @deprecated 3.4.0
* @deprecated Use add_theme_support('custom-background, $args)
* @see add_theme_support()
*
* @param callback $wp_head_callback Call on 'wp_head' action.
* @param callback $admin_head_callback Call on custom background administration screen.
* @param callback $admin_preview_callback Output a custom background image div on the custom background administration screen. Optional.
*/
function add_custom_background( $wp_head_callback = '', $admin_head_callback = '', $admin_preview_callback = '' ) {
_deprecated_function( __FUNCTION__, '3.4', 'add_theme_support( 'custom-background', $args )' );
$args = array();
if ( $wp_head_callback )
$args['wp-head-callback'] = $wp_head_callback;
if ( $admin_head_callback )
$args['admin-head-callback'] = $admin_head_callback;
if ( $admin_preview_callback )
$args['admin-preview-callback'] = $admin_preview_callback;
return add_theme_support( 'custom-background', $args );
}