Check if string contains only digits

Question

I need to check if a string consists only of digits.

But ctype_digit() is not allowed - same with preg_match().

Answer 1

It depends on what you're planning to do - often it's a good idea to already restrict the input.

But ... preg_match() definitely is allowed on www.soscisurvey.de

preg_match('/^\\d+$/', ...)

Comments

Yes - preg_match() works and solves the problem. Thanks!