filter question

[henry]

Hey all !

New here just found this forum....

Question....

I have a form which get a lot of junk viagra links...


can someone help me with; requiring all fields be filled ( to allow submission )
and check to see that "PHONE" field has 10 and only 10 digits.

I will see if that curbs the junk, if not I may use some verification code.

I am new to this and have learned PHP by "destructive Testing" 

Thanks

[elwir]

Code: [Select]

<?php
if(isset($_POST['submit']))
{
$name = $_POST['name'];
$tel = $_POST['tel'];
if (strlen($tel) <> 10) {
echo 'Phone number must have exactly 10 digits:<a href="javascript:history.go(-1)"> go back</a>';  
exit();
}
if (ereg("\viagra", $name)) {
echo 'The word ' . $name . ' is not allowed:<a href="javascript:history.go(-1)"> go back</a>';  
exit();
}
echo "true";
}else{
?>
<form action="index.php" method="POST">
Text
<input type=text name="name"><br>
Tel.
<input type=text name="tel"><br>
<input type="submit" name="submit">
</form>
<?php
}
?>


[henry]

Hey! Thanks Elwir

I have just checked in and have yet to implement .

The 'strlen'  is self-explanatory, but what is 'ereg' stand for?.................
Can .........
}
if (ereg("\viagra", $name)) {

 expanded to ?

}
if (ereg("\viagra, pills, rolex", $name)) { 

Thanks
Henry

[henry]

Thanks, works perfect, I just changed error output to "phone error" don't want to tell spammers how many digits I am looking for.


if (strlen($tel) <> 10)

Next to filter postal code must be "alpha, num, alpha, num, alpha, num" eg b2c3d4