无法在 laravel carbon 中验证真假 var_dump
can't validate true or false var_dump in laravel carbon
我编写代码来检查 $start 和 $end 之间的 2 次当前时间,如下所示:
$current = new Carbon();
$start = product::select('dateS')->where('id',$req->id)->first();
$end = product::select('dateE')->where('id',$req->id)->first();
$val= var_dump($current->between($start->dateS, $end->dateE));
它有效,当我使用 dd($val)
时它会显示:
布尔值(假)
null 或 bool(true) null
接下来,我想这样做,但只有 returns 其他情况。我做错了什么?
if($val == true){
echo "current time is between start and end";
}
else{
echo "current time isn't between start and end";
}
您可以得到开始和结束如下:
$start_and_end_time = product::where('id',$req->id)->select(['dateS', 'dateE'])->first();
如果您在 Product 模型中将日期转换为 dateS
和 dateE
,您将通过上述查询获得 carbon 实例。
产品型号
dates = [
'dateS',
'dateE'
];
因此,您可以将当前日期时间与 dateS
和 dateE
进行比较,如下所示:
$val = \Carbon::now()->between($start_and_end_time->dateS, $start_and_end_time->dateE);
您可以调整您的代码以从作业中删除 var_dump
调用,您应该没问题:
$current = new Carbon();
$product = product::findOrFail($req->id, ['dateS', 'dateE']);
if ($current->between($product->dateS, $product->dateE)) {
echo "current time is between start and end";
} else {
echo "current time isn't between start and end";
}
还合并了查询,因为您只需要 1 个查询就可以获得所需的数据。
我编写代码来检查 $start 和 $end 之间的 2 次当前时间,如下所示:
$current = new Carbon();
$start = product::select('dateS')->where('id',$req->id)->first();
$end = product::select('dateE')->where('id',$req->id)->first();
$val= var_dump($current->between($start->dateS, $end->dateE));
它有效,当我使用 dd($val)
时它会显示:
布尔值(假) null 或 bool(true) null
接下来,我想这样做,但只有 returns 其他情况。我做错了什么?
if($val == true){
echo "current time is between start and end";
}
else{
echo "current time isn't between start and end";
}
您可以得到开始和结束如下:
$start_and_end_time = product::where('id',$req->id)->select(['dateS', 'dateE'])->first();
如果您在 Product 模型中将日期转换为 dateS
和 dateE
,您将通过上述查询获得 carbon 实例。
产品型号
dates = [
'dateS',
'dateE'
];
因此,您可以将当前日期时间与 dateS
和 dateE
进行比较,如下所示:
$val = \Carbon::now()->between($start_and_end_time->dateS, $start_and_end_time->dateE);
您可以调整您的代码以从作业中删除 var_dump
调用,您应该没问题:
$current = new Carbon();
$product = product::findOrFail($req->id, ['dateS', 'dateE']);
if ($current->between($product->dateS, $product->dateE)) {
echo "current time is between start and end";
} else {
echo "current time isn't between start and end";
}
还合并了查询,因为您只需要 1 个查询就可以获得所需的数据。