PHP代码似乎不起作用 [英] PHP Code seems to not work

问题描述

我刚刚问了一个问题并得到了一个快速有用的回复，但这段代码似乎在编辑后似乎没有正常运行。

I just asked a question and got a quick and useful response but this code doesn't seem to be functioning correctly after a few edits.

$firstDate = '2013-09-17 21:20:24';

echo $firstDate;
echo '<br>';

$datetime1 = new DateTime($firstDate);
$datetime2 = new DateTime($secondDate);
$interval  = $datetime1->diff($datetime2);
if ($interval->a <= 7)
{
    if($interval->y !== 0) 
    {
    $elapsed   = $interval->format('%y years ago');
    }
    else
    if($interval->m !== 0) 
    {
    $elapsed   = $interval->format('%m months ago');
    }
    else
    if($interval->a !== 0) 
    {
    $elapsed   = $interval->format('%a days ago');
    }
    else
    if($interval->h !== 0) 
    {
    $elapsed   = $interval->format('%h hours ago');
    }
    else
    if($interval->i !== 0) 
    {
    $elapsed   = $interval->format('%i minutes ago');
    }
    else
    if($interval->S !== 0) 
    {
    $elapsed   = $interval->format('%S seconds ago');
    }

    $elapsed   = str_replace(array('0 years ago', ' 0 months ago', ' 0 days ago',  ' 0 hours ago', ' 0 minutes ago'), '', $elapsed);
$elapsed   = str_replace(array('1 years ago', ' 1 months ago', ' 1 days ago',  ' 1 hours ago', ' 1 minutes ago'), array('1 year ago', '1 month ago', ' 1 day ago', ' 1 hour ago', ' 1 minute ago'), $elapsed);
    echo $elapsed;
}
else 
{
    echo $firstDate;
}

代码应该是给X天前或X秒前的格式

The code is supposed to give the format X days ago or X seconds ago

，但是在几天之后它会停止工作，所以我没有得到几分钟或几秒钟。为什么这不起作用？

but it stops working after days so I don't get minutes or seconds. Why is this not working?

推荐答案

我建议您允许在php.ini文件中查看错误和通知你的开发服务器。
如何在我的开发服务器上启用通知

I would suggest that you allow the viewing of errors and notices in your php.ini file for your development server. How to enable notices on my development server

在运行您提供的代码时，我得到一个注意：未定义的变量：secondDate 在第11行和未定义的属性：DateInterval :: $ a 在第23行。

When running the code you provided, I get a Notice: Undefined variable: secondDate on line 11, and Undefined property: DateInterval::$a on line 23.

您似乎要求PHP使用不完整的数据格式化数字。

It seems you are asking PHP to format a number using incomplete data.

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