Question about Apache Modules

Hi !

I have a question about Apache Modules.

Apache module functions are "static" function. Why?

If you will help, I thank you in advance!


/* Example of a handler */
static int ex_auth_checker(request_rec *r) {
....
return OK;
} /* Registration of handlers */
static void example_register_hooks(apr_pool_t *p) {
ap_hook_auth_checker(ex_auth_checker, NULL, NULL, APR_MIDDLE);
....
}
/* command table */
static const command_rec example_cmds[ ] = {
AP_INIT_NO_ARGS("Example", cmd_example, NULL, OR_OPTIONS, "Example
directive - no arguments"), {NULL}
);