<?php
$mysql_ip = 'localhost';
$mysql_user = 'root';
$mysql_password = '1234';
$db = 'registration';
$link111111111111111111 = mysql_connect($mysql_ip, $mysql_user,$mysql_password,$db);
$db_selected = mysql_select_db($db, $link111111111111111111);
mysql_query('set names utf8', $link111111111111111111);
if (!$db_selected) {
    die ('Can\'t use db : ' . mysql_error());
}
?>
------------------------------------------------------------------------

<?php
$mysql_ip = 'localhost';
$mysql_user = 'root';
$mysql_password = '1234';
$db = 'bind';
$link2222222222222222 = mysql_connect($mysql_ip, $mysql_user,$mysql_password,$db);
$db_selected = mysql_select_db($db, $link2222222222222222);
mysql_query('set names utf8',$link2222222222222222);
if (!$db_selected)
{
    die ('Can\'t use db : ' . mysql_error());
}
?>
-----------------------------------------------------------------------

include_once('connection.php');

中間省

function get_cloud_id($arr)
{
	$email = $arr->{'email'};
	$pwd = $arr->{'pwd'};
	$sql = "SELECT email FROM user WHERE email='$email' and pwd='$pwd'";
	$result = mysql_query($sql, $link????????????????????????);
	$num = mysql_num_rows($result);
	if($num >=1 )
	{
		echo '{"success":true}';
	}else{
		echo '{"success":false,"error_msg":"no ausutor_id!"}';
	}
}