How can understanding string interpolation in PHP help resolve issues with variable recognition in database queries?

When writing database queries in PHP, using string interpolation can help resolve issues with variable recognition by properly inserting variables into the query string. This ensures that the variables are interpreted correctly by the database engine and prevents syntax errors. By using string interpolation, variables are directly embedded within the query string, making it easier to read and maintain the code.

// Example of using string interpolation in a database query
$user_id = 123;
$query = "SELECT * FROM users WHERE id = $user_id";
$result = mysqli_query($connection, $query);