What best practices should be followed when handling SQL queries with multiple conditions in PHP?

When handling SQL queries with multiple conditions in PHP, it is best practice to use parameterized queries to prevent SQL injection attacks and to improve performance. This can be achieved by using prepared statements with placeholders for the conditions in the query. 

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

// Prepare the SQL query with placeholders for conditions
$stmt = $pdo->prepare("SELECT * FROM mytable WHERE column1 = :value1 AND column2 = :value2");

// Bind values to the placeholders
$stmt->bindParam(':value1', $value1);
$stmt->bindParam(':value2', $value2);

// Execute the query
$stmt->execute();

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

Keywords

SQL queries multiple conditions PHP prepared statements SQL injection

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