覆盖 Wordpress 父主题功能 [英] Override a Wordpress parent theme function

问题描述

我正在创建 flowmaster 主题的子主题.我在覆盖父函数时遇到问题.该函数存在于父主题中:

I am creating a child theme of flowmaster theme.I have a problem to override the parent function. The function exists in parent's theme:

add_filter('loop_shop_columns', 'pt_loop_shop_columns');
function pt_loop_shop_columns(){
    if ( 'layout-one-col' == pt_show_layout() ) return 4;
    else return 3;
}

我在子主题中添加了一个功能

I add a function in child theme

if ( ! function_exists( 'pt_loop_shop_columns' ) ) :
function pt_loop_shop_columns(){
    global $wp_query;
    if ( 'layout-one-col' == pt_show_layout() ) return 4;
    else return 4;
}
endif;
add_filter('loop_shop_columns', 'pt_loop_shop_columns');

遇到这个错误:

致命错误:无法重新声明 pt_loop_shop_columns()(以前是声明于C:\xampp\htdocs\futuratab\wp-content\themes\flowmaster-child\functions.php:44)在C:\xampp\htdocs\futuratab\wp-content\themes\flowmaster\woofunctions.php第 9 行

Fatal error: Cannot redeclare pt_loop_shop_columns() (previously declared in C:\xampp\htdocs\futuratab\wp-content\themes\flowmaster-child\functions.php:44) in C:\xampp\htdocs\futuratab\wp-content\themes\flowmaster\woofunctions.php on line 9

请帮忙.谢谢

推荐答案

先执行子主题的功能，然后执行父主题的功能.应该在父主题中使用 function_exists 进行检查.

Function of child theme is executed first and then parent theme's. Checking using function_exists should have been done in parent theme.

为了克服这个问题，您可以移除父主题的挂钩并将自定义函数挂钩到相同的过滤器.

To overcome this you can remove parent theme's hook and hook your custom function to same filter.

remove_filter('loop_shop_columns', 'pt_loop_shop_columns');

add_filter('loop_shop_columns', 'custom_pt_loop_shop_columns');

function custom_pt_loop_shop_columns(){
    global $wp_query;
    if ( 'layout-one-col' == pt_show_layout() ) return 4;
    else return 4;
}

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