PHP - Generating Web Forms with PHP

Introduction

You can combine both the form and the form handler in a single PHP file.
<html>
<head>
<title>Membership Form</title>
<style type="text/css" >
           .error { background: #d33; color: white; padding: 0.2em; }
</style>
</head>
<body>
<?php

if (isset($_POST[" submitButton" ])) {
  processForm();
} else {
  displayForm(array());
}

function validateField($fieldName, $missingFields) {
  if (in_array($fieldName, $missingFields)) {
    echo'class="error" ';
  }
}

function setValue($fieldName) {
  if (isset($_POST[$fieldName])) {
    echo $_POST[$fieldName];
  }
}

function setChecked($fieldName, $fieldValue) {
  if (isset($_POST[$fieldName]) and $_POST[$fieldName] == $fieldValue) {
    echo'checked="checked" ';
  }
}

function setSelected($fieldName, $fieldValue) {
  if (isset($_POST[$fieldName]) and $_POST[$fieldName] == $fieldValue) {
    echo'selected="selected" ';
  }
}

function processForm() {
  $requiredFields = array(" firstName" ," lastName" ," password1" ," password2" ," gender" );
  $missingFields = array();

  foreach ($requiredFields as $requiredField) {
    if (!isset($_POST[$requiredField]) or !$_POST[$requiredField]) {
      $missingFields[] = $requiredField;
    }
  }

  if ($missingFields) {
    displayForm($missingFields);
  } else {
    displayThanks();
  }
}
      function displayForm($missingFields) {
?>
Membership Form

          <?php if ($missingFields) { ?>
          <p class="error" >There were some problems with the form you submitted.
      Please complete the fields highlighted below and click Send Details to
      resend the form.</p>
          <?php } else { ?>
          <p>Thanks for choosing to join The PhoneClub. To register, please
      fill in your details below and click Send Details. Fields marked with an
      asterisk (*) are required.</p>
          <?php } ?>

          <form action="registration.php" method="post" >
            <div style="width: 30em;" >

              <label for="firstName" <?php validateField(" firstName" , $missingFields) ?>>First name *</label>
              <input type="text" name="firstName" id="firstName" value="<?php setValue(" firstName" ) ?>" />

              <label for="lastName" <?php validateField(" lastName" , $missingFields) ?>>Last name *</label>
              <input type="text" name="lastName" id="lastName" value=" <?php setValue(" lastName" ) ?>" />

              <label for="password1" <?php if ($missingFields) echo 'class="error" '?>>Choose a password *</label>
              <input type="password" name="password1" id="password1" value="" />
              <label for="password2" <?php if ($missingFields) echo 'class="error" '?>>Retype password *</label>
              <input type="password" name="password2" id="password2" value="" />

              <label<?php validateField(" gender" , $missingFields) ?>>Your gender: *</label>
              <label for="genderMale" >Male</label>
              <input type="radio" name="gender" id="genderMale" value=" M" <?php setChecked(" gender" ," M" )?>/>
              <label for="genderFemale" >Female</label>
              <input type="radio" name="gender" id="genderFemale" value=" F" <?php setChecked(" gender" ," F" )?> />
              <label for="favoriteWidget" >What's your favorite widget? *</label>
              <select name="favoriteWidget" id="favoriteWidget" size="1" >
                <option value="superWidget" <?php setSelected(" favoriteWidget" , " superWidget" ) ?>>The SuperWidget</option>
              <option value="megaWidget" <?php setSelected(" favoriteWidget" , " megaWidget" ) ?>>The MegaWidget</option>
              <option value="wonderWidget" <?php setSelected(" favoriteWidget" ," wonderWidget" ) ?>>The WonderWidget</option>
            </select>

            <label for="newsletter" >Do you want to receive our newsletter?</label>
            <input type="checkbox" name="newsletter" id="newsletter" value="yes" <?php setChecked(" newsletter" ," yes" ) ?> />

            <label for="comments" >Any comments?</label>
            <textarea name="comments" id="comments" rows="4" cols="50" ><?php setValue(" comments" ) ?></textarea>

            <div style="clear: both;" >
              <input type="submit" name="submitButton" id="submitButton" value= " Send Details" />
              <input type="reset" name="resetButton" id="resetButton" value="Reset Form" style="margin-right: 20px;" />
            </div>
          </div>
        </form>
     <?php
     }

     function displayThanks() {
     ?>
        Thank You
        <p>Thank you, your application has been received.</p>
     <?php
     }
     ?>

      </body>
     </html>
PHP - Generating Web Forms with PHP

Introduction

Related Topic
