checking submitted data on errors

[hhoeksma]

Hi,

I am busy writing a form in PHP. What I would like to do is check if (for example) my email field contains the '@' character and at least one dot.
Does somebody know how to do this??

Thanx for taking the time to read this!

Greetz.

[vfwood]

im not good at regular expressions so i have to make do without :-/

(anyone knows a good tutorial on these please let us know)

this example assumes that the email address is passed as $email

<?

if(strstr(strstr($email, "@"), "."))
{
// email has @ and afterwards has a '.'
}
else
{
// code does not contain '@' followed by '.'
}

?>

there are more involved ways of doing this but this does what you asked 🙂

strstr returns part of a string starting with the first occurence of another string -

strstr("hello there", "llo") will return "llo there"

the important thing to note is that if the string being looked for does not occur this will return B[/B]

hope this helps.

vincent fleetwood
http://www.bodev.com/

[alfoxy]

 
$valid_email = "/^([a-zA-Z0-9\.\-\_]+)\@([a-zA-Z0-9\-]+\.[a-zA-Z0-9\.]+)$/"; // valid email attributes [email][e-mail][/email] 
          if( preg_match($valid_email,$email))				   

          {}								  // valid email so do nothing
          else
          {echo "Sorry but that is an invalid email address please re-enter:<br>";           // invalid email print message and reset $email
          }

[hhoeksma]

Does one of you knows of articles on how this works?
I'd like to understand what I am programming. that's why.

Thaks for the replies though! 🙂

[hhoeksma]

Okay.. .I did the email thing...; with the strsing replacement thing. WOrks fine (if you want to check it try filling in the form: www.tikto.nl/dev/index.php?n=af )

thanx for the help all....

[hhoeksma]

Welll checking with the second one is way better! You can tell people which characters they can or cannot use!

Way better... I used this one to make my Postcode valid!

Great!!!