致命错误：未捕获的异常“异常”有消息“日期时间::

Question

帮助解决这个错误

Fatal error: Uncaught exception 'Exception' with message 'DateTime::_construct() [datetime.--construct]: Failed to parse time string (--) at position 0 (-): Unexpected character' in Z:\home\plati\www\view.php:110 Stack trace: #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'); 

Answer 1

help fix this error

您可以例外通过捕捉它轻松应对，这将解决在这个意义上的错误，你不必理会该错误不再：

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 
} 

至少在有一点你需要做错误处理。例外情况要求您这样做，DateTime会引发异常。

Answer 2

你有没有试过打印值"$newyear-$endmonth-$newday"？因为从错误，它看起来像变量没有填充任何内容。所以请发布该字符串的结果。

Answer 3

$ a中的值为空;检查你的输入。