我正在使用Gravity表单在表单上创建几个复选框部分，每个部分都预先填充了自定义帖子类型中的特定分类术语。

我在Gravity Forms网站上找到了一个这样做的示例：https://www.gravityhelp.com/documentation/article/dynamically-populating-drop-down-fields/ 并将其修改为复选框并显示帖子缩略图，但该示例仅适用于单个复选框。

我知道如何对所有站点分类法执行此操作的唯一方法是复制/粘贴函数并进行修改。这会导致函数膨胀。php文件。我想可能有一种方法可以为每个分类术语执行“foreach”循环，但我不擅长foreach循环，也不知道如何构建它。

这是我为分类术语的每个实例复制/粘贴的代码示例：

add_filter( \'gform_pre_render_3\', \'list_diesel_heater\' );
add_filter( \'gform_pre_validation_3\', \'list_diesel_heater\' );
add_filter( \'gform_pre_submission_filter_3\', \'list_diesel_heater\' );
add_filter( \'gform_admin_pre_render_3\', \'list_diesel_heater\' );
function list_diesel_heater( $form ) {

foreach ( $form[\'fields\'] as &$field ) {

    if ( $field->type != \'checkbox\' || strpos( $field->cssClass, \'diesel-heater\' ) === false ) {
        continue;
    }

    $posts = get_posts( \'numberposts=-1&post_type=product&product_cat=diesel-heaters\' );

    $choices = array();

    foreach ( $posts as $post ) {
        $thumb = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), \'thumbnail\' );
        $url = $thumb[\'0\'];
        $choices[] = array( \'text\' => \'<img src="\' . $url . \'"><p>\'. $post->post_title .\'</p>\', \'value\' => $post->post_title );
    }

    $field->placeholder = \'Select a Post\';
    $field->choices = $choices;
}
return $form;
}

我希望在函数中有一个foreach循环，并用分类术语替换“diesel heater”的实例。我不擅长foreach循环，希望有人能提供一些指导。

add_filter( \'gform_pre_render_3\', \'list_diesel_heater\' );
add_filter( \'gform_pre_validation_3\', \'list_diesel_heater\' );
add_filter( \'gform_pre_submission_filter_3\', \'list_diesel_heater\' );
add_filter( \'gform_admin_pre_render_3\', \'list_diesel_heater\' );
function list_diesel_heater( $form ) {

    foreach ( $form[\'fields\'] as &$field ) {

        if ( $field[\'type\'] != \'checkbox\' ) {
            continue;
        }

        $posts = get_posts( \'numberposts=-1&post_type=product&product_cat=clothing\' );

        $choices = array();

        foreach ( $posts as $post ) {
            $thumb = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), \'thumbnail\' );
            $choices[] = array( \'text\' => \'<img src="\' . $thumb[\'0\'] . \'"><p>\'. $post->post_title .\'</p>\', \'value\' => $post->post_title );
        }

        $field[\'placeholder\'] = \'Select a Post\';
        $field[\'choices\'] = $choices;

    }

    return $form;

}