laravel - There are "and, or" in the PHP conditional judgment at the same time. What is the priority?

Question

If there are "and, or" in the PHP conditional judgment at the same time, what is the priority? For example: {code...} There are 3 conditions in the if statement: {code...} What I want to express is that the first condition must be met, and only one of the second and third conditions must be met. The question is how to write this conditional statement, what in the if() code above...

怪我咯 · Answer

According to the PHP Manual: Operator Priority page, the priority is 与 > 或;

So the code of the subject can be written like this:

$isAuthor = $article->user_id ==  Auth::id();
$isValid = $article->status==0 || $article->expired_at < Carbon::now();

if ($isAuthor && $isValid)
{
    $article->delete();
    return back();
}

ifDon’t write judgment sentences that are too long, as this will not be easy to read;

仅有的幸福 · Answer

Reference Manual

It is recommended to expand the 2 and 3 conditions in parentheses

phpcn_u1582 · Answer

if(a && (b||c))
{
    $article->delete();
    return back();
}

世界只因有你 · Answer

and has a priority greater than or

漂亮男人 · Answer

if ($article->user_id ==  Auth::id() && ($article->status==0 || $article->expired_at < Carbon::now()))
{
    $article->delete();
    return back();
}