WordPress函数：get_header

2025-12-16

一、函数简介

从当前主题中引入 header.php 模板文件。如果名字是特定的，那么包含特定名称的头部文件 header-{name}.php 就会被引入。

如果主题没有 header.php 文件，就会引入默认文件 wp-includes/theme-compat/header.php 。

<?php get_header($name); ?>

二、函数参数

$name(string) 调用header-name.php 默认：None

三、函数案例

（一）生成header.php

<!DOCTYPE html>
<html <?php language_attributes(); ?>>
<head>
    <meta charset="<?php bloginfo('charset'); ?>">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <META HTTP-EQUIV="Pragma" CONTENT="no-cache"> 
    <META HTTP-EQUIV="Cache-Control" CONTENT="no-cache"> 
    <META HTTP-EQUIV="Expires" CONTENT="0"> 
    <link href="/favicon.ico" rel="shortcut icon" />
    <title><?php wp_title('|', true, 'right'); ?></title>
    <?php wp_head(); ?>
</head>
<div id="header">
</div>

（二）调用header.php

下面的代码是一个简单模板文件，专门用来显示 "HTTP 404: Not Found" 错误的（这个文件应该包含在你的主题中，名为 404.php）

<?php get_header(); ?>
<h2>Error 404 - Not Found</h2>

四、调试效果

五、源代码

/**
 * Loads header template.
 *
 * Includes the header template for a theme or if a name is specified then a
 * specialized header will be included.
 *
 * For the parameter, if the file is called "header-special.php" then specify
 * "special".
 *
 * @since 1.5.0
 * @since 5.5.0 A return value was added.
 * @since 5.5.0 The `$args` parameter was added.
 *
 * @param string|null $name The name of the specialized header. Default null.
 * @param array       $args Optional. Additional arguments passed to the header template.
 *                          Default empty array.
 * @return void|false Void on success, false if the template does not exist.
 */
function get_header( $name = null, $args = array() ) {
	/**
	 * Fires before the header template file is loaded.
	 *
	 * @since 2.1.0
	 * @since 2.8.0 The `$name` parameter was added.
	 * @since 5.5.0 The `$args` parameter was added.
	 *
	 * @param string|null $name Name of the specific header file to use. Null for the default header.
	 * @param array       $args Additional arguments passed to the header template.
	 */
	do_action( 'get_header', $name, $args );

	$templates = array();
	$name      = (string) $name;
	if ( '' !== $name ) {
		$templates[] = "header-{$name}.php";
	}

	$templates[] = 'header.php';

	if ( ! locate_template( $templates, true, true, $args ) ) {
		return false;
	}
}

THE END

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