If Your DB contain correct Collation but full data in DB are Doubly Encoded then this will help you remember you only execute its once and take backup of your DB.
<?php
/**
* DoublyEncodeCorrection.php
*
* NOTE: Look for 'TODO's for things you may need to configure.
* PHP Version 5
*
*/
ini_set('display_errors','1');
//error_reporting(E_ALL ^ E_NOTICE ^ E_DEPRECATED);
// TODO: Pretend-mode -- if set to true, no SQL queries will be executed. Instead, they will only be echo'd
// to the console.
$pretend = true;
// TODO: Should SET and ENUM columns be processed?
$processEnums = false;
// TODO: The collation you want to convert the overall database to
$defaultCollation = 'utf8_general_ci';
// TODO Convert column collations and table defaults using this mapping
// latin1_swedish_ci is included since that's the MySQL default
$collationMap = array(
'latin1_bin' => 'utf8_bin',
'latin1_general_ci' => 'utf8_general_ci',
'latin1_swedish_ci' => 'utf8_general_ci'
);
$mapstring = '';
foreach ($collationMap as $s => $t) {
$mapstring .= "'$s',";
}
$mapstring = substr($mapstring, 0, -1); // Strip trailing comma
//echo $mapstring;
// TODO: Database information
$dbHost = 'localhost';
$dbName = 'tina';
$dbUser = 'root';
$dbPass = 'root';
// Open a connection to the information_schema database
$infoDB = mysql_connect($dbHost, $dbUser, $dbPass);
mysql_select_db('information_schema', $infoDB);
// Open a second connection to the target (to be converted) database
$targetDB = mysql_connect($dbHost, $dbUser, $dbPass, true);
mysql_select_db($dbName, $targetDB);
if (!is_resource($targetDB)) {
echo "Could not connect to db!: " . mysql_error();exit;
}
if (mysql_select_db($dbName, $targetDB) === FALSE) {
echo "Could not select database!: " . mysql_error();exit;
}
//
// TODO: FULLTEXT Indexes
//
// You may need to drop FULLTEXT indexes before the conversion -- execute the drop here.
// eg.
// sqlExec($targetDB, "ALTER TABLE MyTable DROP INDEX `my_index_name`", $pretend);
//
// If so, you should restore the FULLTEXT index after the conversion -- search for 'TODO'
// later in this script.
//
// Get all tables in the specified database
$tables = sqlObjs($infoDB,
"SELECT TABLE_NAME, TABLE_COLLATION
FROM TABLES
WHERE TABLE_SCHEMA = '$dbName'");
foreach ($tables as $table) {
$tableName = $table->TABLE_NAME;
$tableCollation = $table->TABLE_COLLATION;
// Find all columns that aren't of the destination collation
$cols = sqlObjs($infoDB,
"SELECT *
FROM COLUMNS
WHERE TABLE_SCHEMA = '$dbName'
AND TABLE_Name = '$tableName'
");
$intermediateChanges = array();
$finalChanges = array();
foreach ($cols as $col) {
// If this column doesn't use one of the collations we want to handle, skip it
if (in_array($col->COLLATION_NAME, $collationMap)) {
//echo "<pre>";print_r($col->COLUMN_NAME);exit;
sqlExec($targetDB,"UPDATE $dbName.$tableName SET $col->COLUMN_NAME = CONVERT(CAST(CONVERT($col->COLUMN_NAME USING latin1) AS BINARY) USING utf8)") ;
}
}
}
/**
* Executes the specified SQL
*
* @param object $db Target SQL connection
* @param string $sql SQL to execute
* @param boolean $pretend Pretend mode -- if set to true, don't execute query
*
* @return SQL result
*/
function sqlExec($db, $sql, $pretend = false)
{
echo "$sql;\n";
if ($pretend === false) {
$res = mysql_query($sql, $db);
//echo "<pre>";print_r($res);exit;
$error = mysql_error($db);
if ($error !== '') {
print "!!! ERROR: $error\n";
}
return $res;
}
return false;
}
/**
* Gets the SQL back as objects
*
* @param object $db Target SQL connection
* @param string $sql SQL to execute
*
* @return SQL objects
*/
function sqlObjs($db, $sql)
{
$res = sqlExec($db, $sql);
$a = array();
if ($res !== false) {
while ($obj = mysql_fetch_object($res)) {
$a[] = $obj;
}
}
return $a;
}
?>
