PHP validation

[fallenangel1983]

My question is a simple one but i am having a hard time solving it and wondered if anyone could help.

 

I have a html page with a form on it linking directly to a php page in which i want to do some validation. i have five text boxes in which a user may enter data. these are 1. desirable feature, 2. firstname, 3. last name, 4. telephone number and 5. email address.

 

this is the code i have for the validation:

 

 

 

#####

 

    function checkDesFea($checkDesFea)

 

    { 

 

      if(!preg_match("/[^a-zA-Z]+$/ ",$checkDesFea))

 

        return TRUE;

      else return FALSE;

 

    }

 

 

  if(!checkDesFea($Feature))

 

  {

 

    $error++;

    echo "<Font color=\"red\"><H3>-----Error Encountered-----Please Enter A Valid Feature-----</H3></Font>";

 

  }

  echo "<h3> Desirable Feature: </h3> $Feature";

  echo "<br><h3> Contact Details: </h3>";

 

#####

 

    function checkFName($checkFName)

 

    { 

 

      if(!preg_match("/[^a-zA-Z]+$/ ",$checkFName))

 

        return TRUE;

 

      else return FALSE;

 

    }

 

 

  if(!checkFName($FName))

 

  {

 

    $error++;

    echo "<Font color=\"red\"><H3>-----Error Encountered-----Please Enter A Valid First Name-----</H3></Font>";

 

  }

 

#####

 

  function checkLName($checkLName)

 

  { 

 

    if(!preg_match("/[^a-zA-Z]+$/ ",$checkLName)&&($Feauture==''))

 

      return TRUE;

 

    else

 

      return FALSE;

 

  }

 

 

 

  if(!checkLName($LName))

 

  {

 

    $error++;

    echo "<Font color=\"red\"><H3>-----Error Encountered-----Please Enter A Valid Last Name-----</H3></Font>";

 

  }

 

#####

 

  function checkTeNum($checkTeNum)

 

  { 

 

    if(!preg_match("/[0-9]{11}$/",$checkTeNum))

 

      return TRUE;

 

    else

 

      return FALSE;

 

  }

 

 

 

  if(!checkTeNum($TeNum))

 

  {

 

    $error++;

    echo "<Font color=\"red\"><H3>-----Error Encountered-----Please Enter A Valid Telephone Number-----</H3></Font>";

 

  }

 

#####

 

  function checkEmail($checkEmail)

 

  { 

 

    if(!preg_match("/^([a-z0-9._-](\+[a-z0-9])*)+@[a-z0-9.-]+\.[a-z]{2,6}$/i",$checkEmail))

      return TRUE;

    else

      return FALSE;

 

  }

 

 

 

  if(!checkEmail($Email))

 

  {

 

    $error++;

    echo "<Font color=\"red\"><H3>-----Error Encountered-----Please Enter A Valid Email-----</H3></Font>";

 

  }

 

  echo "<p><br> First Name: $FName";

  echo "<br> Last Name: $LName";

  echo "<br> Phone Number: $TeNum";

  echo "<br> Email address: $Email";

 

 

 

The code i have seems to work ok but it allows the user to leave the textfield blank. I do not want to allow thee user to leave a textfield blank. how can i get around this issue. i have tried an embedded if statement and a while loop but to no avail. Any suggestions would be appreciated or if you can think of an easier way to validate the dat let me know as the Preg_Match function seems confusing to me lol

 

thanks again

 

FallenAngel

[daydreamer]

Hello.

 

I followed a tutorial the other day, and it uses this code to check if a field is blank:

 

<?php
  if(!$_POST['first_name']){                        // $_POST['first_name'] is the first_name field from your html form.
            $errors .= "Missing First Name\n";


// loads more code here
?>

 

Anyway theres bound to be loads of tutorials on google for php validation check some out!

[dbo]

if( isset($_POST['textfieldhere']) && $_POST['textfieldhere'] != "" )