How can prepared statements be used to improve the efficiency and security of updating multiple rows in a database using PHP?

When updating multiple rows in a database using PHP, it is important to use prepared statements to improve efficiency and security. Prepared statements allow you to separate SQL logic from data input, reducing the risk of SQL injection attacks. Additionally, prepared statements can be reused with different sets of data, improving performance when updating multiple rows. 

// Establish a database connection
$pdo = new PDO('mysql:host=localhost;dbname=mydatabase', 'username', 'password');

// Prepare a SQL statement with placeholders
$stmt = $pdo->prepare("UPDATE mytable SET column1 = :value1 WHERE id = :id");

// Iterate through the rows to be updated
foreach ($rowsToUpdate as $row) {
    // Bind parameters and execute the statement
    $stmt->execute(array(':value1' => $row['value1'], ':id' => $row['id']));
}

Keywords

prepared statements efficiency security updating multiple rows database

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