<?php
// this script will output the queries need to change all fields/tables to a different collation
// it is HIGHLY suggested you take a MySQL dump prior to running any of the generated
// this code is provided as is and without any warranty
die("Make a backup of your MySQL database then remove this line");
set_time_limit(0);
// collation you want to change:
$convert_from = 'latin1_swedish_ci';
// collation you want to change it to:
$convert_to = 'utf8_general_ci';
// character set of new collation:
$character_set= 'utf8';
$show_alter_table = true;
$show_alter_field = true;
// DB login information
$username = 'user';
$password = 'password';
$database = 'databse';
$host = 'localhost';
mysql_connect($host, $username, $password);
mysql_select_db($database);
$rs_tables = mysql_query(" SHOW TABLES ") or die(mysql_error());
print '<pre>';
while ($row_tables = mysql_fetch_row($rs_tables)) {
$table = mysql_real_escape_string($row_tables[0]);
// Alter table collation
// ALTER TABLE `account` DEFAULT CHARACTER SET utf8
if ($show_alter_table) {
echo("ALTER TABLE `$table` DEFAULT CHARACTER SET $character_set;\r\n");
}
$rs = mysql_query(" SHOW FULL FIELDS FROM `$table` ") or die(mysql_error());
while ($row=mysql_fetch_assoc($rs)) {
if ($row['Collation']!=$convert_from)
continue;
// Is the field allowed to be null?
if ($row['Null']=='YES') {
$nullable = ' NULL ';
} else {
$nullable = ' NOT NULL';
}
// Does the field default to null, a string, or nothing?
if ($row['Default']==NULL) {
$default = " DEFAULT NULL";
} else if ($row['Default']!='') {
$default = " DEFAULT '".mysql_real_escape_string($row['Default'])."'";
} else {
$default = '';
}
// Alter field collation:
// ALTER TABLE `account` CHANGE `email` `email` VARCHAR( 50 ) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL
if ($show_alter_field) {
$field = mysql_real_escape_string($row['Field']);
//echo "ALTER TABLE `$table` CHANGE `$field` `$field` $row[Type] CHARACTER SET $character_set COLLATE $convert_to $nullable $default; \r\n";
echo "ALTER TABLE `$table` CHANGE `$field` `$field` $row[Type] CHARACTER SET $character_set COLLATE $convert_to; \r\n";
}
}
}
?>