Change Charset via PHP

<?php
// your connection
mysql_connect("localhost","DB_USER","DB_PASSWORD");
mysql_select_db("DB_NAME");

// convert code
$res = mysql_query("SHOW TABLES ");
while ($row = mysql_fetch_array($res))
{
foreach ($row as $key => $table)
{
mysql_query("ALTER TABLE " . $table . " CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci");
echo $key . " =&gt; " . $table . " CONVERTED<br />";
}
}
?>