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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$stmt = $pdo->prepare("SELECT ? string, ? number");
$stmt->bindValue(1, 1, PDO::PARAM_STR);
$stmt->bindValue(2, 2, PDO::PARAM_INT);
$stmt->execute();
echo json_encode($stmt->fetch(PDO::FETCH_ASSOC));