Re: Variables in variable names

Syntax for variable interpolation you're searching is simple:

${"$letter$number"};
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but this will be a syntax error when use strict; in effect.
use strict; could be calmed down by using eval:

my $result = eval "\$$letter$number";
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But most correct way to solve your problem is just use arrays or hashes.

Best wishes,
Courage, the Cowardly Dog

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Re: Re: Variables in variable names by tachyon (Chancellor) on Nov 30, 2002 at 14:40 UTC
`$letter = 'Oops'; $number = ";print 'You have been hacked!';"; my $result = eval "\$$letter$number";` [download] Eval (and symbolic references) are dangerous - that print could have been `rf -rm /*`. Just don't do it.... Typo intentional. cheers tachyon s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print	[reply] [d/l] [select]
Re: Re: Re: Variables in variable names by Courage (Parson) on Dec 01, 2002 at 09:08 UTC
I am absolutely agree with you Besides, /perlfaq\d/ warns about huge sequrity holes in such situations. But I tried to provide Samn with a syntax he was searching, and after that to advice a better and safer way to solve his task. Best wishes, Courage, the Cowardly Dog	[reply]