ctype_alnum

[sofia403]

I'm trying to make it so that the username in registration form is only alphanumeric. i have that code below, but it still passes through all the special characters. is there a mistake im making someplace? thanks

 

if( empty($_POST['name'])){
header("Location:Messages.php?msg=3"); 
exit();
}
elseif (ctype_alnum($_POST['name'])) {
header( "Location:Messages.php?msg=26" ); 
exit();
}

[fugix]

elseif (ctype_alnum($_POST['name']) == TRUE) {
header( "Location:Messages.php?msg=26" ); 
exit();

[sofia403]

thanks fugix, but it still lets this characters pass through %$'" '

 

any ideas?

[fugix]

so even if it isnt a true alnum it is still directing you to Messages.php?msg=26  ?

[The Little Guy]

Try this:

 

elseif (!ctype_alnum($_POST['name'])) {

[sofia403]

elseif (!ctype_alnum($_POST['name'])) {

 

^^^^^^^^^^^^^^

that worked! thanks