These are important errors. Example: When we try to include () file which is not available. These errors are showed to the user by default but they will not result in ending the script. These errors are non-critical and trivial errors that come across while executing the script in PHP. Example: trying to gain access the variable which is not defined. These errors are not showed to the users by default even if the default behavior is changed. Whiteboard Videos are a great way to engage your customers and generate new revenue website to increase user engagement. These are critical errors. Example: instantiating an object of a class which does not exist or a non-existent function is called. These errors results in termination of the script immediately and default behavior of PHP is shown to them when they take place. Twelve different error types are used to represent these variations internally.