Form validation

[kevincro]

Can someone tell me what to add or remove to the following code in order to require a user to put something in the field?  Or should I do this somewhere else?  The following is a snippet of form validation code.

 

 

function check_field2($Shipped)
{
  if(!preg_match("/[^0-9\ ]+$/",$Shipped))
    return TRUE;
  else
    return FALSE;
}

[pocobueno1388]

All you have to do is this

 

<?php

if (!isset($_POST['field_name']) || $_POST['field_name'] == ""){
   die("This field is required!");
}

?>

[PHP_PhREEEk]

We will need to know exactly what is acceptable input, or what exactly is undesired input.

 

PhREEEk

[kevincro]

It just has to be a number, and it can not be left blank.  Thanks for the help.

[PHP_PhREEEk]

It just has to be a number, and it can not be left blank.  Thanks for the help.

 

Well, not blank is easy enough (the code Poco provided should work), but when you say 'a number', what format are you looking for? Obviously '0' is a number, as is '000000000000000000000000000000000000'. Is there a minimum number of digits? A maximum? Are they allowed separators like '-'? Would you like to force a separator? Is there a specific format using a separator, like 3 digits, then '-', then 3 digits, another '-', then 4 digits? Or just exactly 7 digits? I think you are getting the point... you can be extremely specific or be rather flexible. The more flexible you are, the more chance someone can enter garbage (either by mistake or otherwise).

 

PhREEEk

[teng84]

is_int()

 

[Crew-Portal]

<?php
// For making a validation code try this:
function random_string($max = 20)
{
//create a unique confirmation code.
   $chars = explode(" ", "a b c d e f g h i j k l m n o p q r s t u v w x y z 0 1 2 3 4 5 6 7 8 9");
     for($i = 0; $i < $max; $i++){
      $rnd = array_rand($chars);
       $rtn .= md5($chars[$rnd]);
     }
      return substr(str_shuffle(strtolower($rtn)), 0, $max);
}

// For making a thing that makes sure a username or whatever has correct cahractors and inbetween lengths try:
function valid_username($username)
{
  //validate username
  if(ereg("^[a-zA-Z0-9]+$",$username) && strlen($username) >= 3 && strlen($username) <= 12)
   return true;
  else
   return false;
}
?>