get_header() (get the header)
Introduce the header template of the theme. By default, the header.php file in the current theme directory will be imported. If a name is specified, the header-{name}.php file in the current theme directory will be imported. If the file to be imported does not exist, the wp-includes/theme-compat/header.php file will be imported.
Usage
get_header( $name );
Parameters
$name
(String) (optional) The name of the file to import, if specified the header-{$name}.php file will be included.
Example
<?php get_header(); ?>
The above code will import the header.php file in the root directory of the current theme.
<?php get_header( 'main' ); ?>
The above code will import the header-main.php file in the root directory of the current theme.
if( is_home() ) get_header( 'home' ); elseif( is_404() ) get_header( '404' ); else get_header();
The above code will import the header-home.php file in the current theme root directory on the home page, the 404 page will import the header-404.php file in the current theme root directory, and other pages will import the header.php file in the current theme root directory. .
Others
This function is located at: wp-includes/general-template.php
get_footer() (get the bottom)
get_footer() is used to introduce the bottom template file. If a name is specified, the footer-{name}.php file in the root directory of the current theme will be imported. If not specified, the footer.php file in the root directory of the current theme will be imported. If the file does not exist, wp-includes/theme-compat/footer will be imported. php file.
Usage
get_footer( $name );
Parameters
$name
(String) (optional) The name of the template to import, or the footer-{$name}.php file if specified.
Return value
This function has no return value.
Example
Introduce the footer.php file in the current theme root directory:
<?php get_footer(); ?>
Introduce the footer-new.php file in the current theme root directory:
<?php get_footer( 'new' ); ?>
Introduce different bottom template files according to different pages:
if( is_404() ) get_footer( '404' );//如果是 404 页则引入当前主题根目录的 footer-404.php 文件 elseif( is_home() ) get_footer( 'home' );//如果是首页则引入当前主题根目录的 footer-home.php 文件 else get_footer();//如果不是首页或者 404 页则引入当前主题根目录的 footer.php 文件
Others
This function is located at: wp-includes/general-template.php