What are the common pitfalls to avoid when dealing with database connections and configurations in PHP functions?

One common pitfall to avoid when dealing with database connections and configurations in PHP functions is not properly closing the connection after its use. This can lead to resource leaks and potential performance issues. To solve this, always remember to close the database connection after executing your queries. 

// Incorrect way - not closing the database connection
$connection = mysqli_connect("localhost", "username", "password", "database");

// Perform database operations

// Correct way - closing the database connection
$connection = mysqli_connect("localhost", "username", "password", "database");

// Perform database operations

mysqli_close($connection);

Keywords

MySQL PDO connection pooling SQL injection error handling

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