如何解决foreach、if、else php
我一直在尝试将 else 添加到我的 foreach 循环中,它显示类别和子类别。但是,如果没有可用的类别,那么我希望它显示一个文本,说明没有类别或类别中的产品。
<?PHP
$taxonomy = 'product_cat';
$orderby = 'menu_order';
$show_count = 0; // 1 for yes,0 for no
$pad_counts = 0; // 1 for yes,0 for no
$hierarchical = 1; // 1 for yes,0 for no
$title = '';
$empty = 1;
$args = array(
'taxonomy' => $taxonomy,'orderby' => $orderby,'show_count' => $show_count,'pad_counts' => $pad_counts,'hierarchical' => $hierarchical,'title_li' => $title,'hide_empty' => $empty
);
$all_categories = get_categories( $args );
echo '<ul>';
echo '<div class="category"><h1>CATEGORIES</h1></div>';
foreach ($all_categories as $cat) {
if($cat->category_parent == 0) {
$category_id = $cat->term_id;
echo '<li class="parentcategory">';
echo '<a href="'. get_term_link($cat->slug,'product_cat') .'">'. $cat->name .'</a>';
echo '</li>';
$args2 = array(
'taxonomy' => $taxonomy,'child_of' => 0,'parent' => $category_id,'hide_empty' => $empty
);
$sub_cats = get_categories( $args2 );
if($sub_cats) {
foreach($sub_cats as $sub_category) {
echo '<li class="subcategory">';
echo '<a href="'. get_term_link($sub_category->slug,'product_cat') .'">'. $sub_category->name .'</a>' ;
echo '</li>';
}
}
}
else {
echo '<li>';
echo '<p>';
echo 'Currently there is no categories made';
echo ' or any products in the categories';
echo '</p>';
echo '</li>';
}
}
echo '</ul>';
?>
解决方法
你的 if 语句在 foreach 循环中,所以如果有类别,它会写出该类别的名称。当在最后一个循环中没有类别(或 category_parrent 不等于 0 [$cat->category_parent ==0] then)时,它会进入 else 语句并告诉您有类别。在 foreach 循环之前做一个 if 语句
,感谢@Doğuş,我想出了这个解决方案。我在 foreach 循环之前添加了一个 if( !empty($all_categories) ){
并且它似乎像它应该的那样工作。它在有类别时显示类别,在没有类别时显示文本。
如果有人有更好的解决方案,请发布您的答案。
<?php
$taxonomy = 'product_cat';
$orderby = 'menu_order';
$show_count = 0; // 1 for yes,0 for no
$pad_counts = 0; // 1 for yes,0 for no
$hierarchical = 1; // 1 for yes,0 for no
$title = '';
$empty = 1;
$args = array(
'taxonomy' => $taxonomy,'orderby' => $orderby,'show_count' => $show_count,'pad_counts' => $pad_counts,'hierarchical' => $hierarchical,'title_li' => $title,'hide_empty' => $empty
);
$all_categories = get_categories( $args );
echo '<ul>';
echo '<div class="categories"><h1>CATEGORIES</h1></div>';
if( !empty($all_categories) ){
foreach ($all_categories as $cat) {
if($cat->category_parent == 0) {
$category_id = $cat->term_id;
echo '<li class="parentcategory">';
echo '<a href="'. get_term_link($cat->slug,'product_cat') .'">'. $cat->name .'</a>';
echo '</li>';
$args2 = array(
'taxonomy' => $taxonomy,'child_of' => 0,'parent' => $category_id,'hide_empty' => $empty
);
$sub_cats = get_categories( $args2 );
if($sub_cats) {
foreach($sub_cats as $sub_category) {
echo '<li class="subcategory">';
echo '<a href="'. get_term_link($sub_category->slug,'product_cat') .'">'. $sub_category->name .'</a>' ;
echo '</li>';
}
}
}
} }
else {
echo '<li>';
echo '<p>';
echo 'Currently there is no categories made';
echo ' or any products in the categories';
echo '</p>';
echo '</li>';
}
echo '</ul>';
?>
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