MongoDB查询只显示最近的文档 - MongoDB query only shows most recent document

MongoDB query only shows most recent document

我刚开始与PHP MongoDB，我想做的是从数据库中获取数据，并自动调用它创建个人后div。但是在我实现了下面的代码之后，它只显示了最近的一个，而不是我实际得到的集合中的所有三个文档…

下面是函数的代码，我知道这是一个非常基本的错误(可能):

function get_posts($cursor){
while ($cursor->hasNext()) {
    $entry = $cursor->getNext(); 
    $blog_body = "";
    $blog_body = $blog_body . '<div class="wrap-it">';
    $blog_body = $blog_body . '<div class="jumbotron">';
    $blog_body = $blog_body . '<div class="container">';
    $blog_body = $blog_body . "<h2>" . $entry['title'] ."</h2>";
    $blog_body = $blog_body . "<p>". $entry['description'] ."</p>";
    $blog_body = $blog_body . '<p><a class="rec-btn">Read more &raquo;</a></p>';
    $blog_body = $blog_body . '</div></div></div>';
  }
  return $blog_body;
 }

And被这样调用:

<?php $posts = get_posts($cursor);
  echo $posts; ?>

问题出在$blog_body =" "(将其移到while循环之前):

function get_posts($cursor){
  $blog_body = "";
  while ($cursor->hasNext()) {
    $entry = $cursor->getNext(); 
    $blog_body = $blog_body . '<div class="wrap-it">';
    $blog_body = $blog_body . '<div class="jumbotron">';
    $blog_body = $blog_body . '<div class="container">';
    $blog_body = $blog_body . "<h2>" . $entry['title'] ."</h2>";
    $blog_body = $blog_body . "<p>". $entry['description'] ."</p>";
    $blog_body = $blog_body . '<p><a class="rec-btn">Read more &raquo;</a></p>';
    $blog_body = $blog_body . '</div></div></div>';
  }
  return $blog_body;
 }

在这一行中，您将为每个新迭代重置$blog_body内容。

$blog_body = "";

这样说

function get_posts($cursor) {
    $blog_body = "";
    while ($cursor->hasNext()) {
        $entry = $cursor->getNext(); 
        $blog_body .= '<div class="wrap-it">';
        $blog_body .= '<div class="jumbotron">';
        $blog_body .= '<div class="container">';
        $blog_body .= "<h2>" . $entry['title'] ."</h2>";
        $blog_body .= "<p>". $entry['description'] ."</p>";
        $blog_body .= '<p><a class="rec-btn">Read more &raquo;</a></p>';
        $blog_body .= '</div></div></div>';
    }
    return $blog_body;
}