Question

how do the include_once and require_once functions differ? a there is no difference between these functions. b the include_once function does not return a fatal error if the file include c the require_once function does not return a fatal error if the file include d only include_once is valid in web applications.

Explanation:

In PHP, the require_once function will generate a fatal error if the file - inclusion fails, while the include_once function will generate a warning but not a fatal error and will continue script execution.

Answer:

B. The include_once function does not return a fatal error if the file include fails.