致命错误：未捕获的异常 'Exception'，消息为 'DateTime ::

Question

请帮助解决这个错误

致命错误: 异常 'Exception'，信息为 'DateTime::_construct() [datetime.--construct]: Failed to parse time string (--) at position 0 (-): Unexpected character'，位于 Z:\home\plati\www\view.php 的第 110 行。堆栈跟踪: #0 Z:\home\plati\www\view.php(110): DateTime->_construct('--') #1 {main} thrown in Z:\home\plati\www\view.php on line 110

$newday = $a['dayz'];
$endmonth = $a['monthz'];
$newyear = $a['yearz'];
$date = new DateTime("$newyear-$endmonth-$newday");
$date->modify('+8 day');
$year = $date->format('Y');
$month = $date->format('m');
$day = $date->format('d');

- user1247071

Answer 1

你是否曾尝试打印值为"$newyear-$endmonth-$newday"的变量？因为从错误信息来看，这些变量似乎没有填充任何内容。请输出该字符串的结果。

- mistalee

Answer 2

$a 中的值为空，请检查您的输入。

- kitti

Answer 3

帮忙修复这个错误

你可以通过捕获异常来轻松处理它，这将修复该错误，使你不再需要担心它：

try {
    $newday = $a['dayz'];
    $endmonth = $a['monthz'];
    $newyear = $a['yearz'];
    $date = new DateTime("$newyear-$endmonth-$newday");
    $date->modify('+8 day');
    $year = $date->format('Y');
    $month = $date->format('m');
    $day = $date->format('d');
} catch(Exception $e) {
    # do nothing
}

至少在某个时候，您需要进行错误处理。异常要求您这样做，DateTime会抛出异常。

- hakre