fatal error

Fatal error is an error that causes a program/script to abort. When a fatal error occurs, you may lose whatever data was currently processing. The fatal error will occur when you call the undefined function in your website script file. It stops the execution of the script.

Two types of Fatal Errors:

•  Computer. A condition that halts processing due to faulty hardware, program bugs, read errors or other anomalies. If you get a fatal error, you generally cannot recover from it, because the operating system has encountered a condition it cannot resolve. Typically, buggy applications cause fatal errors (fatal exception errors), and the computer locks up. In most cases, all data that you have changed that has not yet been saved to disk is lost:

  

• Programming, operating system. Any error which causes abrupt termination of the program. The program may be terminated either by itself or by the operating system (a "fatal exception"). In the former instance, the program contains code which catches the error and, as a result, returns to the operating system or calls an operating system service to terminate the program: