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week9.php

thotfrnk
Nov 27th, 2023
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  1. //registration.php
  2. <!DOCTYPE html>
  3. <html>
  4.     <head>
  5.         <title>Server Side Validation</title>
  6.         <link rel="stylesheet" type="text/css" href="main.css">
  7.     </head>
  8. <body>
  9.     <?php
  10.     //1. initialize php variables to hold form data
  11.     $fn = $ln = $email = $birth_yr = "";
  12.     $fnErr = $lnErr = $email_err = $birth_err = $secret_message = ""; //initialize variables to hold error messages
  13.    
  14.     $valid = true; //assume data is valid until proven otherwise
  15.    
  16.     //2. Test if the page is being loaded in response to a form submission
  17.     if ($_SERVER["REQUEST_METHOD"] == "POST" && !empty($_POST["submit"])) {
  18.  
  19.         //****ERROR TESTING - just to show difference in page loading - REMOVE AFTER TESTING!!!!****
  20.         $secret_message = "The form was submitted!";
  21.  
  22.         // 3. Test individual form fields to validate data
  23.  
  24.         //testing first name
  25.         if (empty($_POST["fname"])) { // 3.1 test if fname field was empty
  26.             //set an error message for the element and change valid to false
  27.             $fnErr = "First name is required";
  28.             $valid = false;
  29.         }
  30.         // 3.2 Once field is NOT empty,retrieve data and assess further
  31.         else {
  32.             $fn = $_POST["fname"]; //retrieve fname data
  33.             $fn = test_input($fn); //clean up the fname data - see function below (lines 51 - 56)
  34.    
  35.             //  3.3 test data type and format using regular expression - use same regex as in your client side validation
  36.             if (!preg_match("/^[a-zA-Z'!-]{2,35}$/", $fn)) {
  37.                 $fnErr = "First Name may only contain letters or ' ! and -";
  38.                 $valid = false;
  39.             }
  40.         }
  41.  
  42.         //testing last name
  43.         // 3. Test individual form fields to validate data
  44.         if (empty($_POST["lname"])) { // 3.1 test if fname field was empty
  45.             //set an error message for the element and change valid to false
  46.             $lnErr = "Last name is required";
  47.             $valid = false;
  48.         }
  49.         // 3.2 Once field is NOT empty,retrieve data and assess further
  50.         else {
  51.             $ln = $_POST["lname"]; //retrieve fname data
  52.             $ln = test_input($ln); //clean up the fname data - see function below (lines 51 - 56)
  53.    
  54.             //  3.3 test data type and format using regular expression - use same regex as in your client side validation
  55.             if (!preg_match("/^[a-zA-Z'!-]{2,40}$/", $ln)) {
  56.                 $lnErr = "Last Name may only contain letters or ' ! and -";
  57.                 $valid = false;
  58.             }
  59.         }
  60.  
  61.         //testing email
  62.         // 3. Test individual form fields to validate data
  63.         if (empty($_POST["email"])) { // 3.1 test if fname field was empty
  64.             //set an error message for the element and change valid to false
  65.             $email_err = "Email is required";
  66.             $valid = false;
  67.         }
  68.         // 3.2 Once field is NOT empty,retrieve data and assess further
  69.         else {
  70.             $email = $_POST["email"]; //retrieve fname data
  71.             $email = test_input($email); //clean up the fname data - see function below (lines 51 - 56)
  72.    
  73.             //  3.3 test data type and format using regular expression - use same regex as in your client side validation
  74.             if (!preg_match("/^[a-zA-Z0-9.]{2,30}@[a-zA-Z0-9.]{2,20}.[a-zA-Z]{2,4}$/", $email)) {
  75.                 $email_err = "Not a valid email.";
  76.                 $valid = false;
  77.             }
  78.         }
  79.  
  80.         //testing birth year
  81.         // 3. Test individual form fields to validate data
  82.         if (empty($_POST["birth_yr"])) { // 3.1 test if fname field was empty
  83.             //set an error message for the element and change valid to false
  84.             $birth_err = "Birth year is required.";
  85.             $valid = false;
  86.         }
  87.         // 3.2 Once field is NOT empty,retrieve data and assess further
  88.         else {
  89.             $birth_yr = $_POST["birth_yr"]; //retrieve fname data
  90.             $birth_yr = test_input($birth_yr); //clean up the fname data - see function below (lines 51 - 56)
  91.    
  92.             //  3.3 test data type and format using regular expression - use same regex as in your client side validation
  93.             if (!preg_match("/^[0-9]{4}$/", $birth_yr)) {
  94.                 $birth_err = "Birth year must not contain any letters or special characters.";
  95.                 $valid = false;
  96.             }
  97.         }
  98.  
  99.         // 4.0 WE HAVE VALID DATA
  100.         if ($valid) {
  101.             // if we are successful in reaching here it means that all the form data has validated.
  102.             //We can now choose to proceed to storing data in the database or sending an email etc.
  103.             // today we will simply go to the thank you page
  104.             header("Location: thankyou.php?fn=$fn");
  105.         }
  106.  
  107.     } //end form validation block.
  108.    
  109.     /* This function uses three predefined PHP functions to clean up the data that has been retrieved from our form.
  110.      trim() - Returns a string with leading and trailing spaces removed
  111.      stripslashes() - Returns a string with backslashes stripped off
  112.      htmlspecialchars() - converts some predefined characters to HTML entities
  113.      */
  114.     function test_input($data)
  115.     {
  116.         $data = trim($data);
  117.         $data = stripslashes($data);
  118.         $data = htmlspecialchars($data);
  119.         return $data;
  120.     }
  121.     ?>
  122.     <div class="container">
  123.         <h3 >I am trying to validate this form on the client AND the server!</h3>
  124.         <?php echo "<p>$secret_message</p>"; ?>
  125.  
  126.         <form
  127.         id="reg_form"
  128.         name="reg_form"
  129.         method="post"
  130.         action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>"
  131.         onsubmit="return validate();"
  132.       >
  133.         <fieldset>
  134.           <legend>Registration</legend>
  135.  
  136.           First Name: <input type="text" name="fname" id="fname" value="<?php echo $fn; ?>">
  137.  
  138.           <span id="fname_err" class="error"><?php echo $fnErr; ?></span>
  139.  
  140.             <br>
  141.  
  142.           Last Name: <input type="text" name="lname" id="lname" value="<?php  echo $ln; ?>">
  143.            
  144.             <br>
  145.  
  146.           <span id="lname_err" class="error"><?php echo $lnErr; ?></span>
  147.  
  148.             <br>
  149.  
  150.           Email: <input type="text" name="email" id="email" value="<?php echo $email; ?>">
  151.  
  152.             <span id="email_err" class="error"><?php echo $email_err; ?></span>
  153.  
  154.             <br>
  155.  
  156.           Birth Year:
  157.           <input type="text" name="birth_yr" id="birth_yr" value="<?php echo $birth_yr; ?>">
  158.  
  159.             <span id="birth_err" class="error"><?php echo $birth_err; ?></span>
  160.  
  161.             <br><br>
  162.  
  163.           Gender: <input type="radio" name="gender" id="male" value="male"> Male
  164.           <input type="radio" name="gender" id="female" value="female"> Female
  165.            
  166.           <br><br>
  167.  
  168.           <input type="submit" name="submit" value="Register">
  169.         </fieldset>
  170.       </form>
  171.        
  172.     </div> 
  173. </body>
  174. </html>
  175.  
  176. //thankyou.php
  177. <!DOCTYPE html>
  178. <html>
  179.     <head>
  180.         <title>Learning PHP</title>
  181.         <link rel="stylesheet" type="text/css" href="main.css" />
  182.     </head>
  183. <body>
  184.  
  185.     <h2 >Welcome</h2>  
  186.    
  187.     <!-- Pull the user's first and last names from the super global array   and insert it into the welcome statement-->
  188.     <p> <?php echo "$_GET[fn],"; ?> Thank you for registering with us</p>  
  189. </body>
  190. </html>
  191.  
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