Processing Chinese Input on Web Forms in UTF-8

This section describes how to display a Web form and process form Chinese input data in UTF-8.

Since UTF-8 encoding can handle both simplified and traditional Chinese characters, I wrote a the first test PHP script for processing Chinese input text with some interesting features:

#- Web-Form-Input-Chinese-UTF8.php
#- Copyright (c) 2015,, All Rights Reserved.
  print('<meta http-equiv="Content-Type"'.
    ' content="text/html; charset=utf-8"/>');

# Default input text
  $input = '电视机/電視機';
  $input_hex = 'E794B5E8A786E69CBA2FE99BBBE8A696E6A99F'; 

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

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

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

# Display reply
  if ($reply) {
    print('  text/html; charset=utf-8'."\n");
    print('You have submitted:'."\n");
    print('  Text = '.$input."\n");
    print('  Text in HEX = '.strtoupper(bin2hex($input))."\n");
    print('  Default HEX = '.$input_hex."\n");


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-Chinese-UTF8.php. I saw a Web page with a form that has the suggested input text and a submit button.

The default input Chinese characters were displayed correctly.

After clicking the submit button, I saw a returning Web page with the same form and a reply section. The Chinese input characters were received by PHP correctly:
Processing Web Form Chinese Input in UTF-8

It is interesting to note that the return Web page has a special URL which contains the input text inside the query string. The Chinese characters are included as Hex values of UTF-8 byte sequences:


Conclusion: IE handles Chinese input text in UTF-8 encoding correctly. PHP receives Chinese input text in UTF-8 encoding from Web forms correctly.

Last update: 2015.

Table of Contents

 About This Book

 PHP Installation on Windows Systems

 Integrating PHP with Apache Web Server

 charset="*" - Encodings on Chinese Web Pages

 Chinese Characters in PHP String Literals

 Multibyte String Functions in UTF-8 Encoding

 Input Text Data from Web Forms

Input Chinese Text Data from Web Forms

 Steps and Components Involved

Processing Chinese Input on Web Forms in UTF-8

 Processing Chinese Input on Web Forms in GB18030

 Processing Chinese Input on Web Forms in Big5

 Copying and Pasting Chinese Input to UTF-8 Web Forms

 Copying and Pasting Chinese Input to GB18030 Web Forms

 Copying and Pasting Chinese Input to Big5 Web Forms

 MySQL - Installation on Windows

 MySQL - Connecting PHP to Database

 MySQL - Character Set and Encoding

 MySQL - Sending Non-ASCII Text to MySQL

 Retrieving Chinese Text from Database to Web Pages

 Input Chinese Text Data to MySQL Database


 PDF Printing Version