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PHP: Ternary Operators

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01-14-2007, 10:20 AM · #1

Matthew.

Stud Sausage

Location: England

Trader Rating: (25)

Join Date: Dec 2006

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PHP: Ternary Operators

Note this tutorial was written a while back, as such my coding habits have been changed a bit and some formatting it a bit out of date

This tutorial will explain the method known as "ternary operators" which you will see me especially using a lot. They are also present in javascript and a few other languages, but that's not the point of this tutorial. It's just a quicky and not that in depth but i hope you get something out of it.

Every found your self diving into endless reams of code just to set a simple variable??

e.g:

PHP Code:

   <?php

if( $arraycount > 1 ) 

{

    $result = 'yes';

}

else

{

    $result = 'no';

}

?>

How stupid is that? So many lines of code for just 1 variable?

The Quick if!

It works like this:

Quote:

function/string ( first condition ) ? "value if true" : "value if false";

So for the above code, we can do this:

PHP Code:

   <?php       

$result = ( $arraycount > 1 ) ? 'yes' : 'no';

?>

It does the exact same thing!!

Of course you can also do:

PHP Code:

   <?php

echo  ( $arraycount > 1 ) ? 'yes' : 'no';

?>

And another example because im bored and theres nothing on TV.

PHP Code:

    echo (eregi('msie', getenv('HTTP_USER_AGENT'))) ? 'Youre using IE!' : 'Youre not using IE!';

Anything really, its a good way of keeping order in your code and sparing your fingers. There are a few disadvantages to this technique, for starters it is rarely ever used within a tutorial as the conditional can be missed and since the technique is not widely used it is also not widely understood. The format of the conditional is also not great when debugging.

Any questions/comments, post below and when i get time i or someone else will reply.
Matt.

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01-15-2007, 08:25 AM	· #2
lee101 NamePros Regular Name: Lee Location: United Kingdom Trader Rating: (8) Join Date: Mar 2006 Posts: 344 NP$: 2.90 (Donate)	Thanks for explaning that, I'd seen similar syntax a while back and didn't exactly understand how it worked Rep++ (I think) __________________ http://bypasstopsite.com - Submit your proxy! http://biggertwitter.com - Make twitter a bit bigger! Currently Developing - Linux Screenshots

01-15-2007, 08:27 AM	· #3
psalzmann NamePros Regular Trader Rating: (20) Join Date: Feb 2006 Posts: 517 NP$: 360.80 (Donate)	I use this all the time. Makes code a lot cleaner indeed. Good call

01-15-2007, 09:33 AM	· #4
Matthew. Stud Sausage Location: England Trader Rating: (25) Join Date: Dec 2006 Posts: 1,545 NP$: 32.41 (Donate)	Thanks for the rep Lee Glad it helped. Just be sure not to overuse it psalzmann __________________ My NamePros Tools (firefox plugin, google gadget etc)

01-16-2007, 07:41 AM	· #5
sathish5566 New Member Trader Rating: (0) Join Date: Jan 2007 Posts: 5 NP$: 0.00 (Donate)	sorrry ya i didnt understand thank you for ur tutorial


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