http://www.php.net/manual/en/language.expressions.php

 <?php
$first ? $second : $third
?>

If the value of the first subexpression is *TRUE* (non-zero), then the
second subexpression is evaluated, and that is the result of the conditional
expression. Otherwise, the third subexpression is evaluated, and that is the
value.
---
Weydson Lima
weys...@gmail.com


On Thu, Aug 5, 2010 at 12:30 PM, Dave Maharaj <m...@davemaharaj.com> wrote:

>  Can someone explain what the “?” and the ”:” mean?
>
>
>
> return ($this->meta['head_title'] ? $this->meta['page_header'] : NULL);
>
> Does it mean
>
> return $this->meta['head_title'] IF $this->meta['page_header'] IS NULL /
> NOT SET?
>
>
>
> I googled it and looked thru php code but cannot seem to find an
> explanation anywhere.
>
>
>
> Thanks
>
> Check out the new CakePHP Questions site http://cakeqs.org and help others
> with their CakePHP related questions.
>
> You received this message because you are subscribed to the Google Groups
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> To post to this group, send email to cake-php@googlegroups.com
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>

Check out the new CakePHP Questions site http://cakeqs.org and help others with 
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