在WooCommerce上重新声明函数时出错

Question

在WooCommerce中，当我设置自定义库存状态时，我使用以下函数来隐藏购物车按钮:

//display the custom stock status on the pages
add_action( 'woocommerce_after_shop_loop_item_title', 'wcs_stock_text_shop_page', 25 );
//create our function
function wcs_stock_text_shop_page() {
//returns an array with 2 items availability and class for CSS
global $product;
$availability = $product->get_stock_status();

if ( $product->get_stock_status() === 'noproduzione') {
echo '<span style="color:#b20000;">Fuori produzione!</span>';
//hide purchase button if in "noproduzione"
add_filter('woocommerce_is_purchasable', 'filter_is_purchasable_callback', 10, 2 );
add_filter('woocommerce_variation_is_purchasable', 'filter_is_purchasable_callback', 10, 2 );
function filter_is_purchasable_callback( $purchasable, $product ) {
if ( $product->get_stock_status() === 'noproduzione' ) { 
return false;
}
return $purchasable;
}
}
else if ( $product->get_stock_status() === 'onbackorder') {
echo '<span style="color:#13b200;">Disponibile su ordinazione</span>';
}
else if ( $product->get_stock_status() === '10days') {
echo '<span style="color:#13b200;">Disponibile in 10 giorni</span>';
}
else if ( $product->get_stock_status() === 'inarrivo') {
echo '<span style="color:#e0c81d;">In arrivo</span>';
}

else if ( $product->get_stock_status() === 'outofstock') {
echo '<span style="color:#b20000;">Terminato!</span>';
}
else echo '<span style="color:#53af00;">Disponibile!</span>';

}

但是当我尝试编辑我拥有的主页页面时，我收到了错误:

致命错误:
Cannot redeclare filter_is_purchasable_callback()(先前在functions.php中声明过)"

如何修复?

Answer 1

您已经在wcs_stock_text_shop_page()函数中插入了以下现有代码:

//hide purchase button if in "noproduzione"
add_filter('woocommerce_is_purchasable', 'filter_is_purchasable_callback', 10, 2 );
add_filter('woocommerce_variation_is_purchasable', 'filter_is_purchasable_callback', 10, 2 );
function filter_is_purchasable_callback( $purchasable, $product ) {
if ( $product->get_stock_status() === 'noproduzione' ) { 
return false;
}
return $purchasable;
}

包含filter_is_purchasable_callback()函数的代码块存在两次。

看看你之前的原始问题码。

所以你的相关代码应该改为:

//display the custom stock status on the pages
add_action( 'woocommerce_after_shop_loop_item_title', 'wcs_stock_text_shop_page', 25 );
//create our function
function wcs_stock_text_shop_page() {
//returns an array with 2 items availability and class for CSS
global $product;
$availability = $product->get_stock_status();

if ( $product->get_stock_status() === 'noproduzione') {
echo '<span style="color:#b20000;">Fuori produzione!</span>';
}
else if ( $product->get_stock_status() === 'onbackorder') {
echo '<span style="color:#13b200;">Disponibile su ordinazione</span>';
}
else if ( $product->get_stock_status() === '10days') {
echo '<span style="color:#13b200;">Disponibile in 10 giorni</span>';
}
else if ( $product->get_stock_status() === 'inarrivo') {
echo '<span style="color:#e0c81d;">In arrivo</span>';
}

else if ( $product->get_stock_status() === 'outofstock') {
echo '<span style="color:#b20000;">Terminato!</span>';
}
else echo '<span style="color:#53af00;">Disponibile!</span>';

}
//hide purchase button if in "noproduzione"
add_filter('woocommerce_is_purchasable', 'filter_is_purchasable_callback', 10, 2 );
add_filter('woocommerce_variation_is_purchasable', 'filter_is_purchasable_callback', 10, 2 );
function filter_is_purchasable_callback( $purchasable, $product ) {
if ( $product->get_stock_status() === 'noproduzione' ) { 
return false;
}
return $purchasable;
}

检查这个代码块只存在一次:

//hide purchase button if in "noproduzione"
add_filter('woocommerce_is_purchasable', 'filter_is_purchasable_callback', 10, 2 );
add_filter('woocommerce_variation_is_purchasable', 'filter_is_purchasable_callback', 10, 2 );
function filter_is_purchasable_callback( $purchasable, $product ) {
if ( $product->get_stock_status() === 'noproduzione' ) { 
return false;
}
return $purchasable;
}