What are the advantages of using prepared statements over functions like mysqli_real_escape_string() for database queries in PHP?

Using prepared statements over functions like mysqli_real_escape_string() for database queries in PHP provides several advantages. Prepared statements separate SQL code from data, which prevents SQL injection attacks. They also improve performance by allowing the database to optimize query execution. Additionally, prepared statements are more readable and maintainable as they separate the logic of the query from the data being passed into it. 

// Using prepared statements to execute a query safely

// Establish a database connection
$mysqli = new mysqli("localhost", "username", "password", "database");

// Prepare a SQL statement with a placeholder for the data
$stmt = $mysqli->prepare("SELECT * FROM users WHERE username = ?");

// Bind parameters to the placeholders
$stmt->bind_param("s", $username);

// Set the parameter values
$username = "example_username";

// Execute the prepared statement
$stmt->execute();

// Fetch the results
$result = $stmt->get_result();

// Process the results
while ($row = $result->fetch_assoc()) {
    // Do something with the data
}

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

Keywords

prepared statements mysqli_real_escape_string database queries PHP advantages

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