What are some common challenges when querying data from a database using PHP?

One common challenge when querying data from a database using PHP is handling errors that may occur during the query execution. To solve this, you can use try-catch blocks to catch any exceptions thrown by the database query. 

try {
    // Connect to the database
    $pdo = new PDO("mysql:host=localhost;dbname=mydatabase", "username", "password");
    
    // Prepare and execute the query
    $stmt = $pdo->prepare("SELECT * FROM mytable");
    $stmt->execute();
    
    // Fetch the results
    $results = $stmt->fetchAll(PDO::FETCH_ASSOC);
    
    // Process the results
    foreach ($results as $row) {
        // Do something with each row
    }
} catch (PDOException $e) {
    echo "Error: " . $e->getMessage();
}

Keywords

SQL injection PDO prepared statements database connection error handling

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