不能在if语句中使用Laravel对象

Question

I have this weird error:

I have this if:

if($item->condition && $item->variable)
{
//do something
} else {
//do something else
}

Which gives me this error:

ErrorException in Controller.php line 9001: Trying to get property of non-object

I have used dd() to debug both variables:

dd($item)->condition

if($item->condition && $item->variable)
{
//do something
}

Which returns 0 (as expected).

dd($item->variable)

if($item->condition && $item->variable)
{
//do something
}

Which returns null (also as expected). So $item is an object which contains the variable condition with 0 and the variable variable with null. However I still get this error. If I change $item->variable in the database to "foobar", dd($item->variable) will actually contain "foobar".

How come I cannot use the if here? What am I doing wrong?

Answer 1

you can use

if(!empty($item->condition) && !empty($item->variable))

it will check if variable isset and check for null value