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Home/ Questions/Q 8391897
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Editorial Team
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Editorial Team
Asked: June 9, 20262026-06-09T19:22:40+00:00 2026-06-09T19:22:40+00:00

//this is my connection.php <?php $pdo = new PDO(‘mysql:host=localhost;dbname=test;’, ‘root’); $pdo->exec(SET CHARACTER SET utf8);

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//this is my connection.php
<?php
$pdo = new PDO('mysql:host=localhost;dbname=test;', 'root');
$pdo->exec("SET CHARACTER SET utf8");
?>


//this is my class.php
<?php
include 'connection.php';
$stmt = $pdo->prepare(query here); //wrong part
?>

problem: Error undefined $pdo, what is the right way in doing this? But when i transfer the code from the connection.php to class.php it works fine.

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  1. Editorial Team
    Editorial Team
    2026-06-09T19:22:42+00:00Added an answer on June 9, 2026 at 7:22 pm

    Declare the $pdo as global in the above file connection.php.

    Check Passing a variable from one php include file to another: global vs. not and Passing variables in PHP from one file to another

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