Archived: Fetching Non-ASCII Text from MySQL 5

This section describes how to set character_set_results properly to retrieve non-ASCII character strings from MySQL 5 server.

Based on the analysis provided in the previous section, I revised my PHP script to set character_set_results to utf8. Hope this will allow me to fetch non-ASCII characters correctly from the String_UTF8 column on MySQL 5:

#- MySQL-Fetch-Non-ASCII-UTF8.php
#- Copyright (c) 2015,, All Rights Reserved.
  $con = mysql_connect("localhost", "Herong", "TopSecret");
  $ok = mysql_select_db("HerongDB", $con);
  $test_name = "Non-ASCII Test";

# Set character_set_results
  $sql = "SET character_set_results=utf8";
  mysql_query($sql, $con);

# Show character set encoding variables
  $sql = "SHOW VARIABLES LIKE 'character_set_%'";
  $res = mysql_query($sql, $con);
  while ($row = mysql_fetch_array($res)) {
    print($row['Variable_name']." = ".$row['Value']."\n");

# Delete the record
  $sql = "DELETE FROM Comment_Mixed WHERE Test_Name ='$test_name'";
  mysql_query($sql, $con);
  print("\nNumber of rows deleted: ".mysql_affected_rows()."\n");

# Build the SQL INSERT statement
  $sql = <<<END_OF_MESSAGE
INSERT INTO Comment_Mixed (Test_name, String_ASCII, 
    String_Latin1, String_UTF8, String_GBK, String_Big5)
  VALUES ('$test_name', 'Television', 

# Run the SQL statement
  if (mysql_query($sql, $con)) {
    print("\nNumber of rows inserted: ".mysql_affected_rows()."\n");
  } else {
    print("SQL statement failed.\n");
    print(mysql_errno($con).": ".mysql_error($con)."\n"); 

# Get the recode back
  $sql = "SELECT * FROM Comment_Mixed"
    . " WHERE Test_Name = '$test_name'";
  $res = mysql_query($sql, $con);
  if ($row = mysql_fetch_array($res)) {
    print("\nTest Name = ".$row['Test_Name']."\n");
    print("   String_ASCII: 0x".bin2hex($row['String_ASCII'])."\n");
    print("   String_Latin1: 0x".bin2hex($row['String_Latin1'])."\n");
    print("   String_UTF8: 0x".bin2hex($row['String_UTF8'])."\n");
    print("   String_GBK: 0x".bin2hex($row['String_GBK'])."\n");
    print("   String_Big5: 0x".bin2hex($row['String_Big5'])."\n");


The output confirms that character_set_results=utf8 helped to stop the wrong conversion on non-ASCII characters fetched from the String_UTF8 column on MySQL 5:

C:\herong> \local\php\php MySQL-Fetch-Non-ASCII-UTF8.php
character_set_client = latin1
character_set_connection = latin1
character_set_database = latin1
character_set_filesystem = binary
character_set_results = utf8
character_set_server = latin1
character_set_system = utf8
character_sets_dir = \local\mysql\share\charsets\

Number of rows deleted: 1

Number of rows inserted: 1

Test Name = Non-ASCII Test
   String_ASCII: 0x54656c65766973696f6e
   String_Latin1: 0x54c3a96cc3a9766973696e6f
   String_UTF8: 0xe794b5e8a786e69cba2fe99bbbe8a696e6a99f
   String_GBK: 0xe794b5e8a786e69cba
   String_Big5: 0xe99bbbe8a696e6a99f

However, other encoding conversions were performed on other non-ASCII columns:

My conclusion is that:

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

 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

Archived Tutorials

 Archived: Download and Install PHP 5.2.2 on Windows

 Archived: Downloading Apache 2.2.4 Binary for Windows

 Archived: Installing Apache 2.2.4 on Windows Systems

 Archived: MySQL 5.0 Download, Installation and Start

 Archived: php_mysql.dll - Configuring PHP to Use MySQL Extension

 Archived: Commonly Used php_mysql.dll Functions

 Archived: mysql_connect() - Creating MySQL Connections

 Archived: Character Set Variables on MySQL 5

 Archived: Non-ASCII Test Analysis on MySQL 5

Archived: Fetching Non-ASCII Text from MySQL 5

 Archived: Sending Text in Latin1 Encoding to MySQL 5

 Archived: Sending Text in UTF8 Encoding to MySQL


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