example > form processing

form_process_example.php

<?php

  // here we handle all form errors
  $GLOBALS['formE'] = array();

  // say that some hit the submit button
  // and the form method is POST
  if ( isset( $_POST['submit'] ) )
  {
    // create a shortcut to $_POST var
    $in = &$_POST;

    // say that there is name="name" and must be not empty
    ( isset($in['name']) && !empty($in['name']) && strlen(trim($in['name'])) >= 5 ) OR 
    ( $GLOBALS['formE'][] = 'the name length must be at least 5' );

    // say that there is name="pass" and must be not empty
    ( isset($in['pass']) && !empty($in['pass']) && strlen(trim($in['pass'])) >= 5 ) OR 
    ( $GLOBALS['formE'][] = 'the password length must be at least 5' );

    // if the errors array was empty, everything would be ok
    if ( sizeof ( $GLOBALS['formE'] ) === 0 )
    {
      // save the form
    }

  }

?>

<!-- display any error if there -->
<?php foreach ( $GLOBALS['formE'] as &$e ): ?>
  <p># <?php echo $e ?></p>
<?php endforeach ?>

<!-- the form --->
<form method="post">
  <input type="text" name="name"/>
  <input type="text" name="pass"/>
  <input type="submit" value="submit" />  
</form>