You can also print execution information, such as the
current file being executed. The name of the function
currently being executed can be retrieved using the function
get_active_function_name(). This
function returns a pointer to the function name and doesn't
accept any arguments. To retrieve the name of the file
currently being executed, use
zend_get_executed_filename(). This function accesses the
executor globals, which are passed to it using the TSRMLS_C macro. The executor globals are
automatically available to every function that's called
directly by Zend (they're part of the
INTERNAL_FUNCTION_PARAMETERS described earlier in this
chapter). If you want to access the executor globals in
another function that doesn't have them available
automatically, call the macro
TSRMLS_FETCH() once in that function; this will
introduce them to your local scope.
Finally, the line number currently being executed can be
retrieved using the function
zend_get_executed_lineno(). This function also requires
the executor globals as arguments. For examples of these
functions, see 範例
36-2.