Question

我想将网站上注册参与者的年龄限制为16岁及以上使用php我有if语句

if ($DOBYear === '1999' && $DOBMonth === 'November'|| 'December') {
    echo('You have to be at least 16 years to register');
}

这似乎不起作用，因为当选择11月或12月作为$DOBMonth值时它回应'你需要至少16年注册'，无论$DOBYear是否是static void Main (string[] args) { string directoryPath = @"F:\logs"; using (StreamWriter file = new StreamWriter(@"f:\development\testing.txt", true)) { foreach (string rawImagePath in Directory.GetFiles(directoryPath, "*.log").Select(Path.GetFullPath)) { //image.ReadHeaderLessImage(rawImagePath, width, height, colorOrder, bpp); /* List<MacbethCheckerBatchesColor> resultWithOutExtraLines = wrapper.DetectMacbethColorChecker(image.Data, image.Width, image.Height, image.ColorOrder, image.Bpp, showResult, batchFillFactor); */ //if (resultWithOutExtraLines == null) { file.WriteLine(rawImagePath); //} } } } } 1999年与否。我怎样才能使两个变量相互依赖。

Answer 1

将支票更改为以下内容：

if ($DOBYear === '1999' && ($DOBMonth === 'November'|| $DOBMonth === 'December'))

所以你可以肯定它需要是那一年和其中一个月。

更好的方法是计算年龄，并检查：

$ageDt = new DateTime($age);
$nowDt = new DateTime();
$diff = $nowDt->diff($ageDt);
$age = $diff->y;

Answer 2

您需要单独检查两种组合。检查：

1999年和11月

OR

1999年和12月份

示例：

if (($DOBYear === '1999' && $DOBMonth === 'November') || ($DOBYear === '1999' && $DOBMonth === 'December'))

Answer 3

试试这个：

// assumes you have a DOBday, otherwise drop this and the j
$dob = DateTime::createFromFormat(
    'Y F j',
    $DOBYear. ' ' . $DOBMonth . ' ' . $DOBday
);
$cutoff = new DateTime();

$cutoff->sub('P16Y'); // take off the 16 years.

if ($cutoff < $dob) {
    echo 'You have to be at least 16 years to register';
}

Answer 4

您需要更改if，尝试：

if ($DOBYear === '1999' && $DOBMonth === 'November' || $DOBYear === '1999' && $DOBMonth === 'December'){
echo('You have to be at least 16 years to register');
}

或

if ($DOBYear === '1999' && ($DOBMonth === 'November' || $DOBMonth === 'December')){
echo('You have to be at least 16 years to register');
}

我如何编写代码来控制两个变量，使它们相互依赖

4 个答案: