Shorthand if statement PHP

Question

This is a really basic question and I appoligize for asking, but it would be really usefull for me to understand, so I can use this method in the future,

How would I turn

if($_GET['page']) {
  $page = $_GET['page'];
} else {
  $page = 0;
}

Into a simple 1 line shorthand result ?

Answer 1

Try :

$page = $_GET['page'] ? $_GET['page'] : 0;

Answer 2

A real simple shorthand for your statement would be just

$page = $_GET['page'];

which would be enough for the most cases.

But you really meant if (isset($_GET['page'])), not just if ($_GET['page'])
so, one of these ternaries can be used.

However, for the variables like $page I would use different strategy, called "define your variables!"

So, for the essential variables I would define them all first.

$page = 0;

and then, when processing request, would set it with some value, is present

if(isset($_GET['page'])) {
    if (!is_numeric($_GET['page'])) {
         throw new HTTP400()
    } else {
        $page = $_GET['page'];
    }
}

Answer 3

$page=(isset($_GET['page']))?$_GET['page']:0;

Answer 4

I suggest you use isset() as well for better error handling.

$page = (isset($_GET['page'])) ? $_GET['page'] : 0;

Answer 5

I would add standard check:

$page=isset($_GET['page'])?$_GET['page']:0;