按日期时间在PHP中对数组中的数组进行排序

Question

我目前在PHP中有一个问题,我想按照创建日期对这些帖子进行排序,以便它们可以按降序显示.我一直在寻找一个PHP函数来做到这一点,但没有运气.

有一个简单的解决方案吗？任何想法将不胜感激:)

array
      0 => 
        array
          'post_id' => string '1' (length=1)
          'user_id' => string '3' (length=1)
          'post' => string 'this is a post' (length=14)
          'created' => string '2012-04-05 20:11:38' (length=19)
     1 => 
        array
          'post_id' => string '2' (length=1)
          'user_id' => string '2' (length=1)
          'post' => string 'this is a post' (length=14)
          'created' => string '2012-04-05 20:11:38' (length=19)
     2 => 
        array
          'post_id' => string '3' (length=1)
          'user_id' => string '5' (length=1)
          'post' => string 'this is a post' (length=14)
          'created' => string '2012-04-05 20:11:38' (length=19)

Answer 1

试试这个:

<?php
$a=array(
      0 => 
        array(
          'post_id' => '1',
          'user_id' => '3',
          'post' => 'this is a post',
          'created' => '2012-04-05 20:11:40'
          ),
     1 => 
        array(
          'post_id' => '2',
          'user_id' => '2',
          'post' => 'this is a post',
          'created' => '2012-04-05 20:11:39'
          ),
     2 => 
        array(
          'post_id' => '3',
          'user_id' => '5',
          'post' => 'this is a post',
          'created' => '2012-04-05 20:11:38'
          )
);
function cmp($a,$b){
    return strtotime($a['created'])<strtotime($b['created'])?1:-1;
};

uasort($a,'cmp');
print_r($a);
?>