form validation using php

Discussion in 'PHP' started by sudhakararaog, May 13, 2008.

0
  1. #1
    hi

    i need to validate a field in a form where a user enters their lodgement number as part of a registration form. this lodgement number can have letters, numbers, spaces and special characters. i do not know exactly what those special characters are, so do i have to define the type of special characters and validate accordingly.

    presently my php code for validating the lodgement number is

    $lodgementtf = $_POST["lodgementtf"];

    if($lodgementtf == "" || !preg_match("/^[a-zA-Z0-9_ <]+$/", $lodgementtf) )
    {
    echo "display error message":
    }


    i also have another way of validating

    if($lodgementnumber == "" || !preg_match("/^[a-zA-Z0-9_ !-@£$%^&*()]+$/", $lodgementnumber) )

    does this mean that the special characters can only be = a space AND _!-@£$%^&*() and no other special characters.

    please advice.

    thanks.
     
    sudhakararaog, May 13, 2008 IP
  2. xrvel

    xrvel Notable Member

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    #2
    Yes,

    Btw i'll modify your code a little bit (you need to escape minus "-", the asterisk "*", "(", ")"), i don't know the rests lol about %, etc.

    
if($lodgementnumber == "" || !preg_match("/^([a-z0-9_ !\-\@£\$\%\^\&\*\(\)]+)$/i", $lodgementnumber) )
    PHP:
     
    xrvel, May 14, 2008 IP