WordPress-覆盖短代码

我有一个主题, 可以通过首页上的滑块扩展Visual Composer插件。滑块将显示来自五个不同客户的五个推荐。我想将每个推荐的特色图像添加为滑块中的缩略图。
这是父主题的简化代码：

function jo_customers_testimonials_slider( $atts ) { extract( shortcode_atts( array( 'limit' => 5, "widget_title" => __('What Are People Saying', 'jo'), 'text_color' => "#000" ), $atts ) ); $content = ""; $loopArgs = array( "post_type" => "customers", "posts_per_page" => $limit, 'ignore_sticky_posts' => 1 ); $postsLoop = new WP_Query( $loopArgs ); $content = ""; $content .= '...'; $content .= '...'; $content .= '...'; wp_reset_query(); return $content; } add_shortcode( 'jo_customers_testimonials_slider', 'jo_customers_testimonials_slider' );

我的functions.php文件：

function jo_customers_testimonials_slider_with_thumbnail( $atts ) { extract( shortcode_atts( array( 'limit' => 5, "widget_title" => __('What Are People Saying', 'jo'), 'text_color' => "#000" ), $atts ) ); $content = ""; $loopArgs = array( "post_type" => "customers", "posts_per_page" => $limit, 'ignore_sticky_posts' => 1 ); $postsLoop = new WP_Query( $loopArgs ); $content = ""; $content .= '...'; $content .= get_the_post_thumbnail( get_the_ID(), 'thumbnail' ); $content .= '...'; $content .= '...'; wp_reset_query(); return $content; } add_shortcode( 'jo_customers_testimonials_slider', 'jo_customers_testimonials_slider_with_thumbnail' );

从理论上讲, 我的functions.php文件中的函数应覆盖父主题的短代码。但是当我使用此代码时似乎什么也没发生。我究竟做错了什么？
编辑：
尝试过此代码, 但仍然无法正常工作。

function wpa_add_child_shortcodes(){ remove_shortcode('jo_customers_testimonials_slider'); add_shortcode( 'jo_customers_testimonials_slider', 'jo_customers_testimonials_slider_with_thumbnail' ); } add_action( 'after_setup_theme', 'wpa_add_child_shortcodes' );

也改变了
add_action(‘ after_setup_theme’ , ‘ wpa_add_child_shortcodes’ ); 至
add_action(‘ init’ , ‘ wpa_add_child_shortcodes’ );
, 但结果没有差异。
编辑2(含解决方案)：
更改add_action(‘ after_setup_theme’ , ‘ wpa_add_child_shortcodes’ ); 到add_action(‘ wp_loaded’ , ‘ wpa_add_child_shortcodes’ ); 解决了。
#1你需要调用remove_shortcode(); 像这样：

remove_shortcode('jo_customers_testimonials_slider'); `

在添加具有相同名称的新短代码以” 覆盖” 之前。
你还需要在父主题运行之后调用它, 以便我们在名为wp_loaded的动作挂钩上启动。

function overwrite_shortcode() {function jo_customers_testimonials_slider_with_thumbnail($atts) { extract(shortcode_atts(array('limit' => 5, "widget_title" => __('What Are People Saying', 'jo'), 'text_color' => "#000"), $atts)); $content = ""; $loopArgs = array("post_type" => "customers", "posts_per_page" => $limit, 'ignore_sticky_posts' => 1); $postsLoop = new WP_Query($loopArgs); $content = ""; $content .= '...'; $content .= get_the_post_thumbnail(get_the_ID(), 'thumbnail'); $content .= '...'; $content .= '...'; wp_reset_query(); return $content; }remove_shortcode('jo_customers_testimonials_slider'); add_shortcode('jo_customers_testimonials_slider', 'jo_customers_testimonials_slider_with_thumbnail'); }add_action('wp_loaded', 'overwrite_shortcode');

#2【WordPress-覆盖短代码】你必须在子主题的functions.php中编写此代码

add_action( 'after_setup_theme', 'calling_child_theme_setup' ); function calling_child_theme_setup() { remove_shortcode( 'parent_shortcode_function' ); add_shortcode( 'shortcode_name', 'child_shortcode_function' ); }function child_shortcode_function( $atts) { $atts = shortcode_atts( array( 'img'=> '', 'cat'=> '', 'capt' => '', 'link' => '' ), $atts ); //YOUR OWN CODE HERE$imgSrc = http://www.srcmini.com/wp_get_attachment_image_src( $atts['img'], 'delicious-gallery' ); $imgFull = wp_get_attachment_image_src( $atts['img'], 'full' ); $b = '< div class="screen-item" data-groups=\'["'.strtolower(str_replace(' ', '_', $atts["cat"])).'", "all"]\'> '.'< a href="'.$atts["link"].'" data-title="'.$atts["capt"].'" target="_blank"> < img src="'.$imgSrc[0].'" alt="SCREEN" class="screenImg" /> < /a> '.'< span> '.$atts["capt"].'< /span> '.'< /div> '; //YOUR OWN CODE HEREreturn $b; }