shorthand syntax help

[cloudll]

Hey,

 

I have only recently learnt about using shorthand. I have managed to convert most of my simple if else's and isset checks to shorthand but am struggeling with a few.

 

Could someone show me how I would change this to shorthand, when it has two variables in the else.

if (isset($_SESSION['posY'])) {
    $posY = $_SESSION["posY"];
} else {
    $posY = 50;
     $_SESSION["posY"] = 50;
}

Thanks

 

[Barand]

see

http://pitmanshorthand.homestead.com/BasicsofPitman.html

[requinix]

If I may translate that,

What do you mean by "shorthand"?

If you mean the ternary operator ? : then the answer is,

While possible, in this case you shouldn't. That's more appropriate if you have "if ($condition) $var = $value; else $var = $other_value;". Your if has two statements in that else so it's really just better to leave it as is. And this is coming from someone who generally does use shorthand.

[cloudll]

Ah yes, I did mean ternary operator.

 

Ah ok that makes sense. Thank you.

[mac_gyver]

// set a default value if not already set -

if(!isset($_SESSION['posY'])){

    $_SESSION["posY"] = 50;

}

// and if you really, really, really are creating more variables holding values that you already have variables for (what's wrong with using $_SESSION["posY"] ?) -

$posY = $_SESSION["posY"];

[Jacques1]

PHP 7 has a nice null coalescing operator for exactly this purpose:

$_SESSION["posY"] = $_SESSION["posY"] ?? 50;

If $_SESSION["posY"] is already set, it's left alone, otherwise it's set to the default value 50.

 

JavaScript and Ruby have the same thing, so it's a fairly common concept (PHP is just a bit late again).