Re: Using Variables with Variables

[saintly]

This particular instance calls for arrays, like the others have said. However, for reference, you can do what you were trying to do like this:

${ 'radio_' . $ucount } = param( "radio_$ucount" );
${ "textarea$ucount" } = param( 'textarea' . $ucount );

Note that

• Variables won't be interpolated into a string that uses single-quotes.

  print "something$ucount"; # prints 'something1'
  print 'something$ucount'; # prints 'something$ucount'
  

• You can use the concatenation operator '.' (spot) to create single strings, which is often useful for clarity.

  $x = "something$ucountElse"; 
  # probably tries to interpolate a variable called 
  # $ucountElse, ambiguous
  $x = "something" . $ucount . "Else"; # Unambiguous
  

• You can rewrite $name to ${'name'}, and you can interpolate this syntax too:

  $x = "something${ucount}Else";
  

[Joost]

And remember that that will only work for globals, won't work with strict refs enabled, and is almost always the wrong tool for the job.

It's been discussed here fairly recently: Variable Names and References