How can developers ensure the security of their PHP code against SQL injections while using mysqli_real_escape_string()?

Developers can ensure the security of their PHP code against SQL injections by using mysqli_real_escape_string() to escape special characters in user input before executing SQL queries. This function helps prevent malicious SQL code from being injected into the query, protecting the database from potential attacks. 

// Establish a connection to the database
$connection = mysqli_connect("localhost", "username", "password", "database");

// Escape user input before using it in a SQL query
$username = mysqli_real_escape_string($connection, $_POST['username']);
$password = mysqli_real_escape_string($connection, $_POST['password']);

// Execute a secure SQL query using the escaped user input
$query = "SELECT * FROM users WHERE username='$username' AND password='$password'";
$result = mysqli_query($connection, $query);

// Process the query result
// ...

Keywords

PHP SQL injection mysqli_real_escape_string() security code

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