Problem with 2 simultaneous connection with PDO/Mysql - php

Question

Here is my simplified code:
$connexion = new PDO(SQL_DSN,SQL_USERNAME,SQL_PASSWORD);
$connexion2 = new PDO(SQL_DSN2,SQL_USERNAME2,SQL_PASSWORD2);
[...]
$sqlIndex = "SELECT index_key,index_platforms_code
FROM index
WHERE index_missions_id = :mission";
$initFiches = $connexion->prepare($sqlIndex);
$initFiches->bindParam(":mission" , $_GET['mission']);
$initFiches->execute();
try
{
while ($fiche = $initFiches->fetch(PDO::FETCH_ASSOC))
{
print_r($fiche);
foreach ($structure['champs'] as $masterChamp)
{
//$stmt = $connexion2->prepare($masterChamp['sql']);
}
}
}
catch (exception $e)
{
echo "error".$e->getMessage();
}
My output:
Array
(
[index_key] => 1
[index_platforms_code] => 1
)
Array
(
[index_key] => 2
[index_platforms_code] => 2
)
Array
(
[index_key] => 3
[index_platforms_code] => 3
)
Array
(
[index_key] => 4
[index_platforms_code] => 4
)
All Right, but if I uncomment this line
$stmt = $connexion2->prepare($masterChamp['sql']);
in the foreach, this line broke the while above and here is the new output:
Array
(
[index_key] => 1
[index_platforms_code] => 1
)
Someone have an idea?

Answer 1

Here's a solution that doesn't involve 2 connections and that's more optimized.
$connexion = new PDO(SQL_DSN,SQL_USERNAME,SQL_PASSWORD);
$sqlIndex = "SELECT index_key,index_platforms_code
FROM index
WHERE index_missions_id = :mission";
$initFiches = $connexion->prepare($sqlIndex);
$initFiches->bindParam(":mission" , $_GET['mission'], PDO::PARAM_STR);
$initFiches->execute();
$data = $stmt->fetchAll(PDO::FETCH_ASSOC);
$stmt = $connexion->prepare("SELECT ...."); // Prepare outside of the loop, you don't have to prepare it X times, once is enough.
if(sizeof($data))
{
foreach($data as $row)
{
// Do your statement binding / executing.
}
}
Alternatively, it seems you might be able to do this with table joining rather than issuing a query for each row you get from the 1st table. Since you haven't posted the structure, I guess there's no much helping it at the moment.