[SOLVED] Ternary operator?

[Aureole]

<?php
if(... ? ... : ...) {
    // Do stuff...
}
?>

 

I think this is called a ternary operator, I've read about it on a few sites including the PHP manual but I am still confused as to how it works... can someone please explain rather elaborately... as I just don't get it.

[~n[EO]n~]

There is a great definition and example in the PHP Manual in 14. Expressions

 

I pasted lil' bit from there ::

 

There is one more expression that may seem odd if you haven't seen it in other languages, the ternary conditional operator:

<?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.

 

[wildteen88]

The ternary operator is just an if else statement, without the words if/else, instead they are symbols instead.

 

If you understand an if/else statement you'll be able to use a ternary operator.

 

The syntax of a ternary operator is this:

(condition) ? true : false

 

The above is the same as:

if(condition) {
    true
} else {
    false
}

 

Ternary operators are inline, they cannot execute blocks of code.

[Aureole]

I think I get it now. So is this...

 

<?php
if($_SESSION['logged_in'] == 1) {
    $this->output = 1;
}
else {
    $this->output = 0;
}
?>

 

...the same as this...

 

<?php
if($_SESSION['logged_in'] == 1) ? $this->output = 1 : $this->output = 0;
?>

 

...?

 

Also is that the correct syntax?

[Orio]

Drop the if:

 

<?php
($_SESSION['logged_in'] == 1) ? $this->output = 1 : $this->output = 0;
?>

 

 

Orio.

[Aureole]

Thank you very much, I learn something new everyday here... 

[wildteen88]

Don't forget ternary operators return values. So you could assign a variable a ternary operator, eg instead of doing this

($_SESSION['logged_in'] == 1) ? $this->output = 1 : $this->output = 0;

 

You can do just this:

$this->output = ($_SESSION['logged_in'] == 1) ?  1 : 0;

[Aureole]

Oh I didn't know that, thanks a lot.