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php + validating a password in a form

  • 19-06-2008 09:36AM
    #1
    sleepyescapade
    Registered Users, Registered Users 2 Posts: 788 ✭✭✭


    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 :)


Comments

  • #2
    seamus
    Registered Users, Registered Users 2 Posts: 68,173 ✭✭✭✭seamus


    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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