php variable as conditional assignment

Question

I was wondering how can I assign a conditional assignment to a php variable and use it inside other conditional, like this:

$cndtnal='&& $x==4'

if($y==5 $cndtnal){
   print 'Hello World';
}

Thanks.

@MarcB As long as there's no user-provided input being passed into it, I don't think it's an issue. — esqew
– esqew, Commented Aug 29, 2012 at 3:42
Thanks, but how can I use the eval in this line: if($y==5 $cndtnal) like this? if($y==5 eval($cndtnal)) — notforever
– notforever, Commented Aug 29, 2012 at 3:44
if (eval('$y==5'.$cndtnal)). But it is evil. I urge you find another way to do it. — Amadan
– Amadan, Commented Aug 29, 2012 at 3:56
You do know that $x=4 will always evaluate to true and as such there's no reason to include it in your equality statement, right? — user895378
– user895378, Commented Aug 29, 2012 at 3:57

Sudhir Bastakoti · Accepted Answer · 2012-08-29 03:58:40Z

1

You should try avoiding the use of eval as much as possible, but if you want to use it, then you could do:

$cndtnal='&& $x=4';
if($y==5 .eval("return '$cndtnal';")  ){
   echo 'Hello World';
}
else {
    echo "this";
}

answered Aug 29, 2012 at 3:58

Sudhir Bastakoti

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