PHP-dynamic condition

Question

Hi I wanna do something like this

<?php
$a = 0 ;
$b = 1 ;
$MyCondition = "$a < $b" ;

if ($MyCondition) // should be if($a < $b) !
    //DoSomething
?>

HOW to do it ? Thank you !

@Gordon I tried to build a function which evaluates an expression in a string. I succeeded doing it using `eval()` — Mor Cohen, Jul 30 '13 at 16:45
@MorCohen thanks for the update. Now that you know that you can use eval, check http://stackoverflow.com/questions/951373/when-is-eval-evil-in-php and the answers in the linked dupe for better alternatives. — Gordon, Jul 30 '13 at 16:50

score 4 · Accepted Answer · answered Jul 30 '13 at 09:21

4

<?php
$a = 0 ;
$b = 1 ;
$MyCondition = $a < $b ;

if ($MyCondition) // 
    //DoSomething
?>

answered Jul 30 '13 at 09:21

Maarty

but I get $MyCondition as a string.. how could I deal with it ? – Mor Cohen Jul 30 '13 at 10:15

score 0 · Answer 2 · answered Jul 30 '13 at 09:23

0

$a = 2 ;
$b = 3 ;
$MyCondition = $a < $b ;

if ($MyCondition){
  echo "true";
}else{
  echo "false";
}

I don't see why though, when you can just use

if ($a < $b)

answered Jul 30 '13 at 09:23

Ben Fortune

2 Answers2