if statement shortcut

mhalloran

What the one line way of doing this:

if ($iamcool==true) {
     $x=1;
} else {
     $x=2;
}

I though is was something like this:

 if ($imamcool==true) $x=1 ? $x=2;

but I can't remember. Anyone know?

rheroux

Like so:

<?php

$num = 1;

$b = ($num == 1) ? "num is 1" : "num isn't 1";

echo $b;

?>

webblackes

(condition ? value if true : value if false)

if ($iamcool==true) {
$x=1;
} else {
$x=2;
}

==>

$x =($iamcool==true ? 1 , 2 )

archaeus

it should be like this:

($imamcool==true) : $x=1 ? $x=2;

Good Luck!
archaeus

tekky

Originally posted by archaeus
it should be like this:

($imamcool==true) : $x=1 ? $x=2;

Good Luck!
archaeus

straight from the PHP.net help pages....

note: its (check) ? true : false not (check) : true ? false

ssttoo at hotmail dot com
05-Dec-2003 05:20
Nested ternary operators can be used, although not a "good programming practice", as it does not promote readability and is prone to errors.
<?php
$one = true;
$two = true;
$result = ($one) ? "one" : (($two) ? "two" : "none");    // $result is "one"
$result = ($one) ? "one" : ($two) ? "two" : "none";      // $result is "two"
?> 

swr

$iamcool is already a boolean, so just use it directly:

$x = ($iamcool ? 1 : 2);

Saying "... == true" is always redundant. You can add " == true" to any boolean expression, ad infinitum. The following are all equivalent:

if ($iamcool) ...
if ($iamcool == true) ...
if (($iamcool == true) == true) ...
if ((($iamcool == true) == true) == true) ...

Just use "if ($iamcool) ...".

sunadmn

Hey all how might I be able to return a value that is zero ( I understand that 0 in php == NULL ). Here is what I am trying to do:

foreach($_POST as $key => $value) {
 if($value != "") {
   $varname = strstr($key, 'val_');
   if($varname) {
     $varname = substr($key, 4);
     $values[$varname] = $value;
   }
 }
}

but I do have data that has 0 as the value but I am not getting that back out so how could I fixx the statement to test for NULL but exclude 0??

Thanks all
-SUNADMN

leatherback

0 <> NULL

O = ZERO as in, 1-1
NULL is no value!

Drakla

leatherback wrote:
0 <> NULL

O = ZERO as in, 1-1
NULL is no value!

Leatherback is right - but php is sometimes a lazy sod, unless you tell it to be ultra specific with === and !==

Run this

echo NULL == 0 ? 'yes, NULL == 0' : 'No, NULL == 0 is not true';
echo '<br />';
echo NULL === 0 ? 'yes, NULL === 0' : 'No, NULL === 0 is not true';

And as far as == is concerned, false is NULL is 0. But use === and you'll get the distinction between them.

sunadmn

so would I be correct in thinking that this should work then??

    foreach($_POST as $key => $value) {
     if($value !== NULL) {
       $varname = strstr($key, 'val_');
       if($varname) {
         $varname = substr($key, 4);
         $values[$varname] = $value;
       }
     }
    }

Thanks
-SUNADMN

UPDATE!!

Ok so figured it out had to do this to get the test to work

if($value !== "" ) {