What best practices should be followed when updating multiple records in a database using PHP scripts, especially in terms of error handling and data validation?

When updating multiple records in a database using PHP scripts, it is important to implement error handling and data validation to ensure the process is executed smoothly and securely. This can be achieved by using try-catch blocks to catch any potential errors that may occur during the update process, as well as validating the data before executing the update queries to prevent any malicious input. 

try {
    // Perform data validation before updating records
    // Connect to the database
    $conn = new PDO("mysql:host=localhost;dbname=myDB", $username, $password);
    
    // Prepare the update query
    $stmt = $conn->prepare("UPDATE myTable SET column1 = :value1 WHERE id = :id");
    
    // Loop through the records to be updated
    foreach($records as $record) {
        $stmt->bindParam(':value1', $record['value1']);
        $stmt->bindParam(':id', $record['id']);
        $stmt->execute();
    }
    
    echo "Records updated successfully";
} catch(PDOException $e) {
    echo "Error updating records: " . $e->getMessage();
}

Keywords

SQL injection PDO prepared statements try-catch data sanitization

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