[SOLVED] Please explain this code in words

[webref.eu]

Could someone explain the below code to me in words:

 

$rating = (isset($ReviewRating)) ? $ReviewRating : '';

 

Thanks All.

[revraz]

http://www.addedbytes.com/php/ternary-conditionals/

http://www.totallyphp.co.uk/tutorials/using_if_else_ternary_operators.htm

[Psycho]

It's the same as

if (isset($ReviewRating))
{
    $rating = $ReviewRating;
} 
else
{
    $rating = '';
}

 

It's called the ternary operator and can be described like this:

 

( [CONDITION] ) ? [trUE RETURN VALUE] : [FALSE RETURN VALUE]

 

It is very useful for assigning one of two values to a variable based on a condition - such as in the example you posted. But, it can be used in many different contexts as well.

 

Example:

<?php

echo "You have " . (($items<10) ? 'less than 10' : '10 or more') . " items in your cart";

?>