What kind of expression is this?

Question

i'm noob with php and i was wondering what that expression mean:

$extra_adults = ($num_adults > $people) ? $num_adults-$people : 0;

can someone explain me please?

Thank you very much for your time.

Google "PHP ?:", this is the ternary operator, many languages have it — Marged, Apr 14 '18 at 20:30

score 1 · Answer 1 · answered Apr 14 '18 at 20:31

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This is called ternary operator. A short form of if else statment in php.

Readmore at this link http://php.net/manual/en/language.operators.comparison.php#language.operators.comparison.ternary

answered Apr 14 '18 at 20:31

Siawa Hanif

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score 1 · Accepted Answer · edited Apr 14 '18 at 20:41

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Its a Ternary operator statement. E.g.

$x = $valid ? 'yes' : 'no';

It will assign yes to $x if $valid is true and no if $valid is false.

So, as per your statement which is:

$extra_adults = ($num_adults > $people) ? $num_adults-$people : 0;

If $num_adults is greater than $people then it will do $num_adults -$people and assing the result to $extra_adults, else it will assign 0 to $extra_adults.

edited Apr 14 '18 at 20:41

Tom

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answered Apr 14 '18 at 20:31

Vineet Verma

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Thank you very much, very good explanation! – Max Apr 14 '18 at 20:37

What kind of expression is this?

2 Answers2