some laravel shortcode like a ? and : . please describe

Question

I am working on laravel project. I have this code.

please explain

what is ? and :

if($request->pre_delivered){
    $grain_sale->undelivered_bushels = ($request->bushels_sold >= $request->pre_delivered ? $request->bushels_sold - $request->pre_delivered : NULl);
    dd($grain_sale->undelivered_bushels);
}

Pretty sure that's shorthand conditional code - http://stackoverflow.com/questions/1506527/how-do-i-use-shorthand-if-else — Andy Holmes, Apr 10 '17 at 10:35
This is a ternary operator, available in many languages. Just google it to understand how it works. — Derlin, Apr 10 '17 at 10:35
lol.it's ternary operator.. http://php.net/manual/en/language.operators.comparison.php — Alive to die - Anant, Apr 10 '17 at 10:36
@Dharmendrasingh Please do not make fun of newbies. Every one of us once was. We want StackOverflow to be a welcoming community. — DarkDust, Apr 10 '17 at 10:48

score 0 · Answer 1 · answered Apr 10 '17 at 10:37

There are already many posts about the ternary operator ?:, but in short:

$var = condition ? <if true> : <if false>;

is a shorthand for:

if(condition){
    $var = <if true>;
}else{
    $var = <if false>;
}

Have a look at the php manual for more details on the PHP implementation. Here is an extract:

The expression (expr1) ? (expr2) : (expr3) evaluates to expr2 if expr1 evaluates to TRUE, and expr3 if expr1 evaluates to FALSE. Since PHP 5.3, it is possible to leave out the middle part of the ternary operator. Expression expr1 ?: expr3 returns expr1 if expr1 evaluates to TRUE, and expr3 otherwise.

score 0 · Answer 2 · answered Apr 10 '17 at 10:37

0

It's the ternary operator. If the part before the ? is true, the part right after ? and before : is executed. If the part before ? is false, the part after : is executed.

answered Apr 10 '17 at 10:37

DarkDust

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Alive to die - Anant · Accepted Answer · 2017-04-10T10:52:58.303

0

It's ternary operator

if condition met then statement before : will execute otherwise after: will execute.

A very easy example to understand:- https://eval.in/771934

edited Apr 10 '17 at 10:52

answered Apr 10 '17 at 10:41

Alive to die - Anant

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score -1 · Answer 4 · answered Apr 10 '17 at 10:40

-1

ternary operator isn't a laravel thing it's a php operator and it's available in many languages too. have a look on this article that describes the difference between ternary and if

answered Apr 10 '17 at 10:40

M.Elwan

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some laravel shortcode like a ? and : . please describe

4 Answers4