only accept numbers

[shirvo]

I want a text box to only allow numbers in it. So when someone enters a phone number they have to put numbers, this is so people dont just enter crap

[zq29]

If you want it to block them in real time, you'll need some JavaScript to do that, otherwise, if you just want to validate it after post, you can check it with is_numeric().

[shirvo]

how do i use that

[ted_chou12]

i dont know about is_numeric()
but i can help you with "^[0-9]*"
[code]
<?php
$phone = $_POST['phone_no'];//where it gets the phone no. from the form.
$regex ="^[0-9]*";//this is where it checks if it is all numbers
if(!eregi($regex,$phone)){echo "your phone number is not in numbers, ie. are you from mars??";}
?>
[/code]
got it?
i havnt try it myself... so it might not work.
Ted

[heckenschutze]

PCRE > POSIX regex :)


eg,

[code]$phone = $_POST['phone_no'];//where it gets the phone no. from the form.
if(preg_match('/\d+/', $phone) == 0)
echo "your phone number is not in numbers, ie. are you from mars??";[/code]

Alternativly, use is_int or is_numeric...