在BlueMix的同一php文件中连接另一个db2实例

Question

I connect to a db using this code

//parse VCAP_SERVICES Environment variable

$vcap_services = $_ENV["VCAP_SERVICES"];
$services_json = json_decode($vcap_services,true);
$sqldb = $services_json["sqldb"];
if (empty($sqldb)) {
    echo "No sqldb service instance is bound. Please bind a sqldb service instance";
    return;
}

//Get Credentials object (db,host,port,username,password)
$sqldb_config = $services_json["sqldb"][0]["credentials"];

$conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=".
   $sqldb_config["db"].
   ";HOSTNAME=".
   $sqldb_config["host"].
   ";PORT=".
   $sqldb_config["port"].
   ";PROTOCOL=TCPIP;UID=".
   $sqldb_config["username"].
   ";PWD=".
   $sqldb_config["password"].
   ";";

then I do "my thing" and close the connection with

db2_close($conn);

then when I try to connect to another instance of the db2 db by using the same connection code but changing the middle argument in this line:

$sqldb_config = $services_json["sqldb"][0]["credentials"];

the connection does not work. The two parts of code work just fine separately. It's when I put the code in the same file in that order that it causes this error.

Answer 1

Once you've closed a connection you have to open a new one (using the code you're already using) in order to access to the DB again. It is correct to close the connection after each 'logic' group of queries.