Is not a number validation

how do I check if a user has entered a number?
Like I don't want them to enter a number

so I'm trying to do


else if($firstNameSignUp IS A NUMBER)) {
$firstNameSignUpError = "Your first name cannot be a number you entered " . $firstNameSignUp;
$firstNameSignUp = "";
}


how can I do this?

use is_int

if(is_int($str)){
echo 'number';
}

but then what if the user enters their name as 3.141592654, or s1, or even worse $ ?

im now trying to work with

if(!preg_match("/^[\w-]+$/", $firstNameSignup)) {
$firstNameSignupError = "Your first name cannot contain numbers or symbols, you entered " . $firstNameSignup;
$firstNameSignup = "";
}

but its not working =[

if (preg_match('#[^a-z]+$#i', $firstNameSignup)) {

if (preg_match('#[^a-z]+$#i', $firstNameSignup)) {


you are slowly becoming my best friend lol thanks!!!


if (preg_match('#[^a-z]+$#i', $firstNameSignup)) {


ok one more question...

what if they could use numbers and letters but not symbols except - and _?

oh ya and for e-mail

how will that work

letters+@+letters+.+2-4letters

Numbers, letters, underscore and hyphen:


'#^[^\w\-]$#i'


E-mail:


'#^[\w\.\+\-]{1,}@(?:[\w\-]+\.){1,}[a-z]{2,4}$#i'

thank you once again your amazing ^.^

dang the number one is not quite working =[

its allowing symbols other then - and _

dang the number one is not quite working =[

its allowing symbols other then - and _

It can't be passing anything else. \w only covers underscore, letters and numbers.

http://docs.google.com/viewer?a=v&q=cache:tpOT17RuGWAJ:www.phpguru.org/downloads/PCRE%2520Cheat%2520Sheet/PHP%2520PCRE%2520Cheat%2520Sheet.pdf+pcre+cheatsheet&hl=en&gl=uk&pid=bl&srcid=ADGEESjXFa-n63bgF9jNBPwClHBTijkRqmWgci35rRaHKiDXXk0t1a8vbbx-48FESpaawjbKaSwyNotCO8GC2jnpzxjxV6cR41XouAkRsp5cLRzcwW6jumZp29IUtRZGymSnX4jLY4eJ&sig=AHIEtbTnRemKs0DRynWGf9CE7_1IxdYnpA

It can't be passing anything else. \w only covers underscore, letters and numbers.

http://docs.google.com/viewer?a=v&q=cache:tpOT17RuGWAJ:www.phpguru.org/downloads/PCRE%2520Cheat%2520Sheet/PHP%2520PCRE%2520Cheat%2520Sheet.pdf+pcre+cheatsheet&hl=en&gl=uk&pid=bl&srcid=ADGEESjXFa-n63bgF9jNBPwClHBTijkRqmWgci35rRaHKiDXXk0t1a8vbbx-48FESpaawjbKaSwyNotCO8GC2jnpzxjxV6cR41XouAkRsp5cLRzcwW6jumZp29IUtRZGymSnX4jLY4eJ&sig=AHIEtbTnRemKs0DRynWGf9CE7_1IxdYnpA

Ok I am here typing in my form and it allowes me to type

Bobby@ or Tod&11

when I use

'#^[^\w\-]$#i'

But I can't write

@bobby

Change it to:


'#[^\w\-]+#i'

Change it to:


'#[^\w\-]+#i'


brilliant thank you ^.^

dang now how do I do this

'#[^\w\-\.\,\!]+#i'

allow letters numbers hyphens periods commas and exclamation marks

nm my regex worked fine lol was something else casuing the error ^.^ (bad variable to check against lol)