將資料庫由latin1轉換為utf-8

translate_latin1_to_utf8.php

<?php
define('DB_NAME', 'putyourdbnamehere');    // 數據庫名
define('DB_USER', 'usernamehere');     // MySQL用戶名
define('DB_PASSWORD', 'yourpasswordhere'); // 密碼
define('DB_HOST', 'localhost');    // 很大可能你無需修改此項

function UTF8_DB_Converter_DoIt() {
 $tables = array();
 $tables_with_fields = array();

 // Since we cannot use the WordPress Database Abstraction Class (wp-db.php),
 // we have to make an a stand-alone/direct connection to the database.
 $link_id = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD) or die('Error establishing a database connection');
 mysql_select_db(DB_NAME, $link_id);

 // Gathering information about tables and all the text/string fields that can be affected
 // during the conversion to UTF-8.
 $resource = mysql_query("SHOW TABLES", $link_id);
 while ( $result = mysql_fetch_row($resource) )
  $tables[] = $result[0];

 if ( !empty($tables) ) {
  foreach ( (array) $tables as $table ) {
   $resource = mysql_query("EXPLAIN $table", $link_id);
   while ( $result = mysql_fetch_assoc($resource) ) {
    if ( preg_match('/(char)|(text)|(enum)|(set)/', $result['Type']) )
     $tables_with_fields[$table][$result['Field']] = $result['Type'] . " " . ( "YES" == $result['Null'] ? "" : "NOT " ) . "NULL " .  ( !is_null($result['Default']) ? "DEFAULT '". $result['Default'] ."'" : "" );
   }
  }

  // Change all text/string fields of the tables to their corresponding binary text/string representations.
  foreach ( (array) $tables as $table )
   mysql_query("ALTER TABLE $table CONVERT TO CHARACTER SET binary", $link_id);

  // Change database and tables to UTF-8 Character set.
  mysql_query("ALTER DATABASE " . DB_NAME . " CHARACTER SET utf8", $link_id);
  foreach ( (array) $tables as $table )
   mysql_query("ALTER TABLE $table CONVERT TO CHARACTER SET utf8", $link_id);

  // Return all binary text/string fields previously changed to their original representations.
  foreach ( (array) $tables_with_fields as $table => $fields ) {
   foreach ( (array) $fields as $field_type => $field_options ) {
    mysql_query("ALTER TABLE $table MODIFY $field_type $field_options", $link_id);
   }
  }

  // Optimize tables and finally close the mysql link.
  foreach ( (array) $tables as $table )
   mysql_query("OPTIMIZE TABLE $table", $link_id);
  mysql_close($link_id);
 } else {
  die('<strong>There are no tables?</strong>');
 }

 return true;
}
UTF8_DB_Converter_DoIt();
?>

translate_latin1_to_utf8_note.txt

建立一個空的PHP檔案
將以上的程式碼加入後
改好連線資訊
執行
原先為latin1_swedish_ci的資料表
就會被改為utf8_general_ci