Question

I'm trying to create a php script that I can direct to in Windows Task scheduler because I need this job to run every 15 mintues and insert in a database table.

My issue currently is that I have a working query in MySQL Workbench, but for privilege reasons I now need to select data from a table on a read only database and insert it into a table in our production database (different host IP).

Basically, right now I'm selecting from readTable on host 1 and inserting to writeTable on host 1. However, I need to select/join from readTable on host 1 and insert on writeTable on host 2, if that makes sense.

The problem: I don't know how to use multiple db connections like that in a php file, and I couldn't even find a way to do it in workbench.

Here's the php code with query:

        <?php 

    $servername = "localhost";
    $username = "username";
    $password = "password";

    $servername2 = "localhost";
    $username2 = "username";
    $password2 = "password";

    // Create connection
    $conn = new mysqli($servername, $username, $password);
    $conn2 = new mysqli($servername2, $username2, $password2);

    // Check connection
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    }
    echo "Connected successfully";

    // Check connection2
    if ($conn2->connect_error) {
        die("Connection failed: " . $conn2->connect_error);
    }
    echo "Connected successfully";

    $data = mysqli_query($conn, "SELECT 
                         c.extension as Extension
                        ,RESPONSIBLEUSEREXTENSIONID as ExtID
                        , sum(Duration) as Total_Talk_Time_seconds
                        , round(sum(Duration) / 60,2) as Total_Talk_Time_minutes
                        , sum(if(LEGTYPE1 = 1,1,0)) as Total_Outbound
                        , sum(if(LEGTYPE1 = 2,1,0)) as Total_Inbound
                        , sum(if(Answered = 1,0,1)) as Missed_Calls
                        , count(DISTINCT b.NOTABLECALLID) as Total_Calls
                      --  , NOW()
                          FROM cdrdb.session a
                          LEFT JOIN cdrdb.callsummary b
                           ON a.NOTABLECALLID = b.NOTABLECALLID
                             LEFT join cdrdb.mxuser c
                              ON a.RESPONSIBLEUSEREXTENSIONID = c.EXTENSIONID
                               WHERE b.ts >= curdate()
                               AND c.extension IN (7295,7306,7218,7247,7330,7000,7358)
                          group by c.extension");

    foreach ($data as $d) {

    mysqli_query($conn2, "Insert into test.ambition_test(Extension, ExtID, Total_Talk_Time_seconds,Total_Talk_Time_minutes,Total_Outbound, Total_Inbound, Missed_Calls, Total_Calls, Time_of_report )   
                            ON duplicate key update Total_Talk_Time_seconds = values(Total_Talk_Time_seconds), Total_Talk_Time_minutes = values(Total_Talk_Time_minutes), Total_Outbound = values(Total_Outbound), Total_Inbound = values(Total_Inbound)
                  , Missed_calls = values(Missed_Calls), Total_Calls = values(Total_Calls), Time_of_report = values(NOW())");
    }

     ?>

Is it possible to create multiple connections and dictate which ones to use in each part of that query?

Answer 1

Make a connection to your first server:

$conn = new mysqli($servername, $username, $password);

Make a connection to your second server - defined in a separate variable:

$conn2 = new mysqli($servername2, $username2, $password2);

You can get data (SELECT) from the first server, e.g.

$data = mysqli_query($conn, "SELECT ...");

Then use that data - held in $data - to write (INSERT) into the database on the second server, e.g.

mysqli_query($conn2, "INSERT ...");

You will of course need a loop to cycle through $data and bind the appropriate values in the query. In pseudo-code....

foreach ($data as $d) {
    // $d is an array of rows from the query done on the first server. 
    // Because you're in a loop you can deal with this data 1 row at a time and do whatever you want with it
    // e.g. write it to the second server's database...
    mysqli_query($conn2, "INSERT INTO some_table(v1, v2) VALUES('".$d['v1']."', '".$d['v2']."') ");
}

I use PDO and am unfamiliar with the mysqli_query syntax. You may need to bind the parameters (as you do in PDO) rather than reference them in the query. But the principle of what I've written is the same - you loop through the data obtained from the first server, and write it to the second server inside a loop. This lets you deal with each row of data coming from the query on the first server.

Answer 2

Sure is that possible, but you have to bind it. If you want to use selfmade connections (not over a framework) then you have to build multiple connections like ....

$servername = "localhost";
$username = "username";
$password = "password";

// Create connection
$conn = new mysqli($servername, $username, $password);

// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
} 
echo "Connected successfully";

$servername2 = "localhost";
$username2 = "username";
$password2 = "password";

// Create connection
$conn2 = new mysqli($servername, $username, $password);

// Check connection
if ($conn2->connect_error) {
die("Connection failed: " . $conn2->connect_error);
} 
echo "Connected successfully";

Then you can use each connection with accessing the right $conn or $conn2 variable.

Answer 3

$conn = new mysqli($host, $username, $password); // connection 1
$conn2 = new mysqli($host, $username, $password); // connection 2

根据您的目的，

用户$ conn1和$ conn2 ......

PHP script to handle multiple connections

3 个答案: