Topic awaiting preservation: bad stuff

ok, I know how to do this in perl, but I need to do it in php. I need to check that a string is only numbers, letters, spaces, and underscores. It doesn't have to be all of those, it just can't be something other than those. Any help would be greatly appreciated.

<?php

$input = "aAzZhH12390 _";

if (preg_match("/^[\w\x20]+$/", $input)) {
// $input string is ok
} else {
// $input string isn't ok
}

?>

are the characters used in regular expressions the same in php and perl?

http://www.maninacan.com

also, what does the \x20 part mean?

http://www.maninacan.com

They are in a preg_reg match which use perl regular expression syntax.

As for the \x I'm not completely positive, but I think it removes any white space and comments.

If that's incorrect, I hope (know) someone will come along and correct me.

-Butcher-

yes, I did some looking and I think that's what the \x thing does, but then what's the 20 for, Maybe it's part of removing whitespace, because %20 is a space, hmmmm. Hopefully Mr. Max comes back here to tell me

http://www.maninacan.com

You can count on mr.maX comming along here sooner or later.

Sorry I can't help you on the 20 part as I have just really started learning Perl and Regex myself recently.

can someone give me a quick email address validification php script as well, it'd be greatly appreciated.

http://www.maninacan.com

If you mean just to check to see if it fits the proper form of an email address you can use this:

eregi("^[a-zA-Z0-9_]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-\.]+$", $email)



[This message has been edited by butcher (edited 12-14-2001).]

\x doesn't remove anything, \x20 simply specifies character with hexadecimal value (20 hex = 32 dec = space).

<?php

// Written by mr.maX, http://www.maxworld.co.yu/

$email = "someone@example.com";

if (preg_match("/^[^\s]+?\@[^\s]+?\.\w{2,}$/", $email)) {
// $email string is ok
} else {
// $email string isn't ok
}

?>

Hello. I am trying to do the same, but the string must be four charachters. one letter followed by three numbers. the following works, but it allows more than three numbers. any suggestions?

function check_field1($password){
if (preg_match("/^[a-zA-Z]+[0-9]+[0-9]+[0-9]+$/s",$password)) return TRUE;
else return FALSE;
}

preg should be:

/^([a-zA-Z]{1})([0-9]{3})$/s

thank you genis!

no prob - and by the way, welcome!

wow, this topic got dug up again after over a year.

wow, 13 months exactly... i didn't even notice.

anyway, here's a link i should've given that guy...

PCRE regex syntax for PHP