从最后一个项目类别列表中删除逗号 - wordpress

Question

我正在使用

<?php
    foreach((get_the_category()) as $category) {
        echo $category->cat_name . ', ';
    }
?>

现在这显然会在每个“类别”的末尾输出一个逗号，我将如何从列表中的最后一项中删除逗号？

Answer 1

使用rtrim：

$cats = '';
foreach((get_the_category()) as $category) {
    $cats .= $category->cat_name . ', ';
}
echo rtrim($cats, ', ');

Answer 2

你可以试试这个：

$categories = array();
foreach(get_the_category() as $category) {
    $categories[] = $category->cat_name;
}

echo implode($categories, ',');

Answer 3

这是使用join函数 -

执行此操作的另一种方法

echo join(",",array_map(function($category){return $category->cat_name;}, get_the_category()));

Answer 4

$custom_terms = wp_get_post_terms( $post->ID, 'area');

            $seprator = ", ";

             $comma = sizeof($custom_terms);

               foreach($custom_terms as $custom_term) {          

                          echo  $custom_term->name;

                          if($comma > 1){

                           echo $seprator;

                           $comma--;      

                          }

                 }