Validations

[Terfanda]

HI All

i have written this function to create a form


function CreateForm()
{

print("<form action=\"Petition.php\" method=post>\n");
print("First Name :<input type=text name=\"fname\" size=24 maxlength=32>");
print(" Last Name :<input type=text name=\"lname\" size=24 maxlength=32><br>\n");
print(" Email :<input type=text name=\"mailaddress\" size=30 maxlength=60><br>\n");
print("<input type=hidden name=\"BeenSubmitted\" value=\"TRUE\"><br>\n");
print("<input type=submit name=\"submit\" value=\"Submit\"></form>\n");
}


I need to know how can validate : fname, lname (check if they are empty or filled with numbers)
and check if the email entered is in the correct form

Thank you in advance

[michaellunsford]

I just installed AndyB's captcha script, which includes what you need and an anti-robot security feature. I'd try it first:

[a href=\"http://www.digitalmidget.com/php_noob/captcha.php\" target=\"_blank\"]http://www.digitalmidget.com/php_noob/captcha.php[/a]


just to check if a field is empty, you can do a few ways. If using $_POST, you can just check for the $_POST variable (if it's empty, a browser typically won't send it), or you could strlen the variable, too.
[code]if(!$_POST['fname']) $errorvar.="no first name\n";
if(!$_POST['lname']) $errorvar.="no last name\n";
if(!$_POST['email']) $errorvar.="no email address\n";[/code]

checking email address is a bit more complex... Here's a snipit from AndyB's script:
[code]        if (!eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $email)) {
            $err.= $email. " is not a valid email address.<br/>";
        }
[/code]

hope that helps.