What are the potential pitfalls to avoid when updating multiple records in a MySQL database using PHP?

When updating multiple records in a MySQL database using PHP, one potential pitfall to avoid is not properly sanitizing user input, which can lead to SQL injection attacks. To mitigate this risk, always use parameterized queries or prepared statements to securely pass user input to the database. Additionally, avoid using dynamic SQL queries with concatenated user input. 

// Connect to MySQL database
$mysqli = new mysqli("localhost", "username", "password", "database");

// Check connection
if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
}

// Prepare a parameterized query to update records
$stmt = $mysqli->prepare("UPDATE table_name SET column1 = ? WHERE id = ?");

// Bind parameters
$stmt->bind_param("si", $value1, $id);

// Loop through multiple records to update
foreach($records as $record) {
    $value1 = $record['value1'];
    $id = $record['id'];
    $stmt->execute();
}

// Close statement and connection
$stmt->close();
$mysqli->close();

Keywords

MySQL PHP database update records

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