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php + validating a password in a form

sleepyescapade · 2008-06-19 08:36:11

Hi there, I'm creating a form to register a user, I'd like the user's password to be alphanumeric, and if its not, to display an error message. I can't seem to find any functions that deal with this in a simple way. Anyone have any ideas/suggestions I'd really appreciate it :)

19-06-2008 09:36AM

#1

sleepyescapade

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Hi there,

I'm creating a form to register a user, I'd like the user's password to be alphanumeric, and if its not, to display an error message. I can't seem to find any functions that deal with this in a simple way. Anyone have any ideas/suggestions I'd really appreciate it

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Comments

#2 19-06-2008 09:50AM

seamus

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preg_match() would probably be your man. Have a look at regular expressions.

The Regex

/^[A-Za-z0-9]*$/ will match all alphanumeric strings.

It can also be written as /^[:alnum:]*$/ but for some reason I find the former easier to read.

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