Revert "Revert "Update system/core/Common.php""

This reverts commit 3de57eaea8510ea9cfd70f063565c24904669c4c.
Revert "Update system/core/Log.php"

This reverts commit bbc6ab4736a896be83e3e3d5f8856374ffa2984c.
Revert "Update system/core/Common.php"

This reverts commit 8af05ac97513764cc539919e179794df87352c30.