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Help breaking down a this php code

Posted on 2012-03-17
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Last Modified: 2012-03-18
Hi All,

I having been getting some help with a custom store that I am building and have been given a piece of code by support that works but I do not understand how and would be grateful if someone could break it down for me.

.(isset($_SESSION['currencySymbol']))?$_SESSION['currencySymbol']:"$".

I understand the isset. So for me this statement says if session "currencySymbol" exists, but I do not know what the ? is for at the end as well as the :"$"
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Question by:Lightwalker
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2 Comments
 
LVL 17

Accepted Solution

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bigeven2002 earned 500 total points
ID: 37733684
Hello,

The ? : style is a ternary operator which is meant to be shorthand for traditional if statements.

The code above is the same as:
if(isset($_SESSION['currencySymbol']):
    
else:
    $_SESSION['currencySymbol'] = "$";
endif;

Open in new window


So basically, if that SESSION variable is not set, then set it to "$".
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LVL 83

Expert Comment

by:Dave Baldwin
ID: 37733778
What he said.  See Ternary Operator on this page: http://www.php.net/manual/en/language.operators.comparison.php
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