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getting 2 different outputs while using the same currency 'egp'

$currency = ($q->currency == 'egp')? '£' : (($q->currency == 'usd') ? '$' : '€');

this line outputs $

$currency = ($q->currency == 'egp')? '£' : ($q->currency == 'usd') ? '$' : '€';

this one outputs £

and I can't find why?

note: the only difference is the () around the second ternary operator statement

Romany Saad
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    The removal of the extra () causes the precedence of the operators to change. If you need to do this kind of thing, I usually recommend switching to `if elseif else` standard syntax for ease of use, readability and understanding. – Jonnix Jul 06 '16 at 13:42
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    Ternary operations are awesome, for short and simple checks. Nested ternary operations should be illegal. – M. Eriksson Jul 06 '16 at 13:47

1 Answers1

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Consider this code:

echo (true?"Left is first":(true?"Right is first":""));

Left is first

Versus 

echo (true?"Left is first":true?"Right is first":"");

Right is first

The exaplanation can be found at http://php.net/manual/en/language.operators.comparison.php#language.operators.comparison.ternary.

In short, in the second case PHP will evaluate true?"Left is first":true as the condition for the ternary expression. This will evaluate to Left is first which evaluates to true and therefore Right is first will be echoed

apokryfos
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