一个连接两个不同MYSQL数据库的PHP程序

echo "Connecting as mysql
n";

$connection1 = mysql_connect('localhost', 'mysql', '') or die($php_errormsg);

echo "connection1 is $connection1
n";

echo "Selecting test for mysql user
n";

mysql_select_db('test', $connection1) or @die("Error " . $php_errormsg . mysql_error());

echo "Connection as joyce
n";

$connection2 = mysql_connect('localhost', 'joyce', '') or die($php_errormsg);

echo "connection2 is $connection2
n";

echo "Selecting books for joyce user
n";

$db2 = mysql_select_db('techbizbookguide', $connection2) or die(mysql_error());

$query1 = "select foo from test";

$query2 = "select title, authorFirst, authorLast from bookinfo";

echo "Querying test
n";

$users = mysql_query($query1, $connection1) or die(mysql_error());

echo "Querying books
n";

$books = mysql_query($query2, $connection2) or die(mysql_error());

echo "Foos from test
n";

while (list($foo) = mysql_fetch_row($users)){

echo $foo, "
n";

}

echo "Books in techbizbookguide
n";

while (list($title, $authorFirst, $authorLast) = mysql_fetch_row($books)){

//Use trim in case we have a book by "Madonna" or "Prince" or...

echo $title, ' by ', trim($authorFirst . ' ' . $authorLast), "
n";

}

?>