What are E_ERROR,E_PARSE,E_WARNING,E_NOTICE?

Question

What is use of those error constants?

Answer 1

E_CORE_ERROR:

This is a fatal error when you start PHP. It is an error in a configuration or PHP isn't able to operate.

E_CORE_WARNING:

This can happen if something went wrong in your configuration that does not complete terminate your Execution System.

E_STRICT:

These are notifications which makes suggestions of how you can make your program code better.

E_ALL:

This is, a constant of all errors supported except E_STRICT.

Answer 2

Those messages are representing the different error levels:

E_ERROR:

If this is thrown while parsing the PHP-Code the PHP Script will shut down.

E_WARNING:

This is a critical error that does not terminate the execution of your script. But It is needed to be fixed 'cause of undefined behavior.

E_PARSE:

If this is thrown, you have syntactically errors in your code. This will terminate the execution.

E_NOTICE:

This is only a little error that notifies you. For example if you had declared a variable that is not assigned you will get a notice.

I hope this would help you.

Answer 3

S-Coder thank you for such perfect explaination

Can you explain me about E_CORE_ERROR, E_CORE_WARNING, E_ALL,E_STRICT?

if you know