Php 如果嵌套的foreach为空，则foreach语句回显一次？

好的，我有一个foreach语句，在wordpress的3个多站点博客中搜索关键字，如下所示：

<?php
 foreach ( $blogs as $blog ):
 switch_to_blog($blog['blog_id']);
 $search = new WP_Query($query_string);  
                     if ($search->found_posts>0) {
                            foreach ( $search->posts as $post ) {
echo "POST CONTEN";
                            }
                    }elseif ($search->found_posts===0) {
                        # code...
                        $notfound = true;
                    }
        endforeach;
if ($notfound) {
    # code...
    echo "POST NOT FOUND";
}

您的逻辑是反向的。您应该从“nothing found”条件开始，并在找到某个内容时将其更改为false：

$not_found = true;

while ...
   if ($search->found_posts != 0) {
     $not_found = false;
   }
}
if ($not_found) {
  echo 'nothing found'; // $not_found is true
} else {
  echo 'found something'; // $not_found is false
}

---

很抱歉格式化。刚刚在这里复制了你的代码。与您的操作相反，查看此处的变量$

<?php
 $found = false;
 foreach ( $blogs as $blog ):
 switch_to_blog($blog['blog_id']);
 $search = new WP_Query($query_string);  
                     if ($search->found_posts>0) {
                            foreach ( $search->posts as $post ) {
echo "POST CONTEN";
                            }
                      $found = true;
                    }elseif ($search->found_posts===0) {
                        # code...
                    }
        endforeach;
if ($found == false) {
    # code...
    echo "POST NOT FOUND";
}

---

好的，是这样的，我的问题是，我需要在第一个foreach中使用if-else，当我这样做时，每个blog都没有找到echos 3次，它没有找到任何内容……在这种情况下，
foreach（$blogs…{if（$found）echo“在$blog中找到了一些内容”}否则{echo“在$blog中找不到任何内容”}
-键入东西可以做trickI编辑了我的代码这是我认为我正在做的，但它仍然没有找到三次而不是一次..修复了它我在循环外添加了另一个if（$notfound）来只回显一次
<?php
 $found = false;
 foreach ( $blogs as $blog ):
 switch_to_blog($blog['blog_id']);
 $search = new WP_Query($query_string);  
                     if ($search->found_posts>0) {
                            foreach ( $search->posts as $post ) {
echo "POST CONTEN";
                            }
                      $found = true;
                    }elseif ($search->found_posts===0) {
                        # code...
                    }
        endforeach;
if ($found == false) {
    # code...
    echo "POST NOT FOUND";
}