What potential issues can arise when using the include command in PHP, especially when transitioning from older versions to newer versions like PHP 5.6?

When transitioning from older versions to newer versions like PHP 5.6, potential issues with the include command may arise due to changes in the way paths are resolved. To solve this, it's important to ensure that paths are specified correctly to avoid errors. One common issue is using relative paths that may not work as expected in newer versions. To fix this, use absolute paths or adjust the relative paths accordingly.

// Incorrect usage of include with relative path
include 'myFile.php'; 

// Correct usage of include with absolute path
include __DIR__ . '/myFile.php';