问题
What is the best way to override the woocomerce function that is in defined in the woocomerce plugins directory inside some class.
For example I am wanted to change the function start_el
declared in the class WC_Product_Cat_List_Walker
. I can change the function code in the plugin directory by the changes remains until I upgrade the woocomerce plugin.
How can I override it in my theme functions.php
file?
回答1:
try this...
you can create a class and extend to WC_Product_Cat_List_Walker.
class My_WC_Product_Cat_List_Walker extends WC_Product_Cat_List_Walker {
public $tree_type = 'product_cat';
public $db_fields = array ( 'parent' => 'parent', 'id' => 'term_id', 'slug' => 'slug' );
public function start_el( &$output, $cat, $depth = 0, $args = array(), $current_object_id = 0 ) {
$output .= '<li class="cat-item cat-item-' . $cat->term_id;
if ( $args['current_category'] == $cat->term_id ) {
$output .= ' current-cat';
}
if ( $args['has_children'] && $args['hierarchical'] ) {
$output .= ' cat-parent';
}
if ( $args['current_category_ancestors'] && $args['current_category'] && in_array( $cat->term_id, $args['current_category_ancestors'] ) ) {
$output .= ' current-cat-parent';
}
$output .= '"><a href="' . get_term_link( (int) $cat->term_id, $this->tree_type ) . '">' . __( $cat->name, 'woocommerce' ) . '</a>';
if ( $args['show_count'] ) {
$output .= ' <span class="count">(' . $cat->count . ')</span>';
}
}
}
then use it as like:
add_filter('woocommerce_product_categories_widget_args', 'woorei_product_categories_widget_args', 10, 1);
function woorei_product_categories_widget_args($args) {
$args['walker'] = new My_WC_Product_Cat_List_Walker;
return $args;
}
回答2:
First, simply try copying /includes/walkers/class-product-cat-list-walker.php
into your theme and include the new file. It may be pluggable and you can simply edit it there directly without any other effort. I'm not 100% sure.
If that fails, then you can do it by filtering woocommerce_product_categories_widget_args and supplying your own walker instead of trying to edit WooCommerce's.
Leave your duplicated walker file in place, but rename all the class names from WC_Product_Cat_List_Walker
to SO_Product_Cat_List_Walker
.
And then in your theme's functions.php
tell the widget to use this new class as the appropriate Walker.
function so_32901408_cat_widget( $args ){
// include new walker class - where ever you saved/named it
include_once( 'wc-class-product-cat-list-walker.php' );
// set the name as the new walker for the widget args
$args['walker'] = new SO_Product_Cat_List_Walker;
return $args;
}
add_filter( 'woocommerce_product_categories_widget_args', 'so_32901408_cat_widget' );
来源:https://stackoverflow.com/questions/32901408/best-way-to-override-the-woocommerce-category-list-walker