The Ternary Operator: PHPFusion 8 Support

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The Ternary Operator
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The ternary operator takes three operands...

[ulist=disc]A Condition
A Result For True
A Result For False[/ulist]

Sounds like an if statement right?
You are right but the ternary operator is a short hand method of doing if statements. Less code is nice yes?

Here's an example:

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 <?php

 $member_check = (iMEMBER) ? "You Are a Member" : "You Are A Guest";
 
 echo $member_check;

?>

First there is a condition (iMEMBER), then a question mark (?), and then a true result (You Are a Member), followed by a colon (:), and a false result (You Are A Guest). If the user is a member (iMEMBER) $member_check will be set to 'You Are a Member', else it will be set to 'You Are A Guest'.

That ternary statement would be like this in a normal if statement:

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 if (iMEMBER) {
       $member_check = "You Are a Member";
    } else {
       $member_check = "You Are A Guest";
    }

echo $member_check;

So, my point?
Using ternary operator's allows you to compact five lines of code into one, less code, less mess, more understandability amongst coders.

0 replies

:) since I'm off duty.. Just a bit contribution.

To preview on post and blank on load.

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$data['news_news'] = (isset($_POST['news_news']) && (!empty($_POST['news_news'])) ? addslashes(stripinput($_POST['news_news']) : '';

To load plural based on array count.

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echo " ".((count($rows) >1) ? " ".(count($rows))." Fishes" : " ".(count($rows))."Fish";

These were classics in our code base.

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Hi,

Or like so...

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echo " ".((count($rows) >1) ? " ".(count($rows))." ><(((º> ><(((º> ><(((º>" : " ".(count($rows))."><(((º>";

Better?

Regards

0 replies

Hahahahah ...

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Of course sometimes we still need to use if statements, sometimes we have conditions that would only work using an if statement. Example say you want to do something with a big block of code or if it has more than one condition inside it...

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if (FUSION_SELF ="news.php") {

echo"All my code and that<br />";

echo"Moar code";

if($userdata['user_id'] ="49320") {

echo" Hej Jib";

}

}

Of course that can still be used in a ternary but listen, let's be practical.

Am I rite?

0 replies

btw
$userdata['user_id'] =[bcolor=#ff6600]=[/bcolor] "49320"

very sneaky error

also
($userdata['user_id'] ="49320"

== always true or "49320"

0 replies

also this, but point taken from Jib.

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FUSION_SELF =="news.php"

-------------

I wish to share also this... sneaky ***

See, sometimes you need to select stuff based on integer, 0,1,2,3,4..

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$current_value = $data['current_value'] (i.e. is 0 from db).
$option = array('0'=>'Me', '1'=>'You', '2'=>'We');
foreach ($option as $arr=>$val) {
$selected = ($current_value == '0' ) ? "selected" : '';
echo "<option value='$arr' $selected>$val</option>\n";
}

There is an error above code ($arr=='0') // this is 0 the integer.
($arr == 0) // this is NULL!

If the DB returns 0 as selection, the select will not get selected unless, you do this:

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if ($input_value || $input_value == '0') {
/* I.e. NOT NULL, OR Zero integer. */

                            $input_value = stripinput($input_value);
                            $select = (isset($input_value) && $input_value == $arr) ? "selected" : "";
                        }

Turning 0 to text via stripinput() doesn't help because stripinput() thinks it's a NULL too.

The 0 is the sneakiest among all errors. I hate it most. lol

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Quote

hien wrote:
Turning 0 to text via stripinput() doesn't help because stripinput() thinks it's a NULL too.

The 0 is the sneakiest among all errors. I hate it most. lol

That's why there is the "Is identical to" (===) operator along with double quotations (") instead of single quotations ('). It sees the 0 as a string in double quotes, then you test if a variable is identical to it.

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if ($input === "0"){
//The input is identical to the number 0
}

(correct me if I'm wrong. This is what I understand of it)

Edited by skpacman on 04-04-2014 16:54, 10 y

0 replies

— 2 years later —

An information to share regarding the ternary statement.

$a = $a ? : 0;

is NOT

$a = $a ?: 0;

The earlier will treat you mean you want a whitespace and therefore returns a " ". The later will return $a.
Do not put space between ? and :

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