访问对象数组中最后一个对象的属性?

问题描述:

鉴于您有一个包含不同数量对象的数组,您如何访问最后一个对象的属性?我试图用end($array);,但它给人的错误:Object of class Post could not be converted to string访问对象数组中最后一个对象的属性?

类是:

class Post { 
     private $datafile; 
     public $index; 
     public $subIndex; 
     public $poster; 
     public $title; 
     public $message; 
     public $date; 

// constructor and some unrelated methods here 

     public function getCommentData($givenIndex) { 
      $comments = null; 
      $data = file($this->datafile); 
      foreach($data as $row) { 
       list($index, $subIndex, $poster, $message, $date) = explode('|', $row); 
       $this->index = $subIndex; // SubIndex ties a Comment to a Post (same ID) 
       if($this->index == $givenIndex) { 
        $comment = new Post(); 
        $comment->poster = $poster; 
        $comment->message = $message; 
        $comment->date = date(DATEFORMAT, strtotime($date)); 
        $comments[] = $comment; 
       } 
      } 
      return $comments; 
     } 
} 

现在,我想只能访问最后一个注释项目的属性,但我不知道应该如何做完了?在一个常规数组中,end()是快速且易于使用的,但是对于对象来说,它看起来不起作用?

下面是一个例子的var_dump:

array (size=2) 
    0 => 
    object(Post)[4] 
     private 'datafile' => null 
     public 'index' => null 
     public 'subIndex' => null 
     public 'poster' => string 'Postaaja' (length=8) 
     public 'title' => null 
     public 'message' => string 'Kommentti' (length=9) 
     public 'date' => string '5 Mar 2013 | 23:12' (length=18) 
    1 => 
    object(Post)[5] 
     private 'datafile' => null 
     public 'index' => null 
     public 'subIndex' => null 
     public 'poster' => string 'Toinenkin' (length=9) 
     public 'title' => null 
     public 'message' => string 'Lisäkommentti' (length=14) 
     public 'date' => string '5 Mar 2013 | 23:13' (length=18) 

谢谢!

编辑: 这里是我试图使用它的方式:

$comments = new Post(FILECOMMENTS); 
$currentComments = $comments->getCommentData($i); // $i is the index of current newspost item 

$newsComments = new Format(); 
$newsComments->formatShortComment($currentComments, $i); 

而且在格式类中的方法:

// This comment is displayed as a short text in the main News view 
public function formatShortComment($data, $index) {?> 
    <div class="newsComments"> 
     <p class="newsPreviewComment"> 
     <?php 
      $lastItem = end($data); 
      if(!empty($lastItem->message)) { 
       echo '<i>&quot;',$lastItem->message,'&quot;</i> '; 
       echo '-',$lastItem->poster; 
      } 
     ?></p> 
     &raquo; <a href="?page=comments&amp;id=<?php echo $index; ?>">Show All/Add comments</a> 
     (<?php echo $commentCount; ?>) 
    </div><?php 
} 
+1

请发布生成错误的代码。根据描述以及此处显示的内容,它应该在理论上起作用,但如果没有导致问题的代码,肯定无法确定。 – Adrian 2013-03-13 18:23:11

+1

如何使用array_pop($ arrayofObjects); – Cups 2013-03-13 18:25:14

+1

@Adrian:我将代码添加到文章 – 2013-03-13 18:32:55

你可以尝试:

$tempArray = array_values($data); 

$lastItem = $tempArray[count($tempArray)-1]; 

我希望我没有错过重要的东西,但是如果你只是想获得PHP数组的最后一个元素:

$lastItem = $data[count($data) - 1];