Concatenate 2 variables

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Hi guys! I just wanted to ask if it is possible to concatenate 2 variables? Like the following code. But if not, are there other ways?

 

<?PHP
   $num = $_POST['num'];
   for ($i = 1; $i <= $num; $i++) {
      // concat $var1 with $i; ---> how should i do that?
   }
?>

 

Thanks guys.

[PFMaBiSmAd]

Please use an array for your form variables, it will greatly simplify your code because you can then just use a foreach() loop to iterate over the form data - http://us2.php.net/manual/en/faq.html.php#faq.html.arrays

[needs_upgrade]

What if i don't use arrays, can it be done?

[Ken2k7]

What's $var1?

[needs_upgrade]

$var1 can be any variable. It can be just "var" that i wanted to be concatenated with a number. like $i is 1 to 10. So i want to get the values of var1, var2, ..., var10. But $i is indefinite.

[Ken2k7]

If $i is indefinite, this will just be an endless loop, right?

[PFMaBiSmAd]

Using numbered variables, you need to keep track of how many of them there are. If you use an array, like suggested, you don't have to do that, giving the simplest and fastest code.