- debug_backtrace – It generate a generates a backtrace
- debug_print_backtrace – It prints a backtrace
- error_get_last – It returns the last error occurred
- error_log – It sends an error to the server error-log
- error_reporting – It specifies which errors are occurred.
- restore_error_handler – It restores the previous error handler
- restore_exception_handler – It r restores the previous exception handler
- set_error_handler – It sets a user-defined function to handle errors
- set_exception_handler – It sets a user-defined function to handle exception
- trigger_error – It can be used to create a custom error message .
- user_error – Its an alias of trigger_error()