Processing Web Form Input in ASCII

∟Processing Web Form Input in ASCII

This section describes how to display a Web form and process form input data in ASCII.

To show you how Web form input data can be processed with a PHP script, I wrote this short test script to display a simple Web form, and process the input in one script:

<?php 
#- Web-Form-Input-ASCII.php
#- Copyright (c) 2005 HerongYang.com. All Rights Reserved.
#
  print('<html>');
  print('<body>'."\n");

# Default input text
  $input = "Television";

# Form reply determination
  $reply = isset($_REQUEST["Submit"]);

# Process form input data
  if ($reply) {
    if (isset($_REQUEST["Input"])) {
      $input = $_REQUEST["Input"];
    }
  }

# Display form
  print('<form>');
  print('<input type="Text" size="40" maxlength="64"'
   . ' name="Input" value="'.$input.'"/><br/>');
  print('<input type="Submit" name="Submit" value="Submit"/>');
  print('</form>'."\n");

# Display reply
  if ($reply) {
    print('<pre>'."\n");
    print('You have submitted:'."\n");
    print('  Text = '.$input."\n");
    print('</pre>'."\n");
  } 

  print('</body></html>');
?>

After moving this PHP script file to Apache server document directory, I tested it with Internet Explorer (IE) with this URL: http://localhost/Web-Form-Input-ASCII.php. I saw a Web page with a form that has the suggested input value and a submit button.

After clicking the submit button, I saw a returning Web page with the same form and a reply section, which confirmed that the input text were correctly received by the PHP script.