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 Example 56-2.
Example 56-2. Printing execution information.
zend_printf("The name of the current function is %s<br>", get_active_function_name(TSRMLS_C));
zend_printf("The file currently executed is %s<br>", zend_get_executed_filename(TSRMLS_C));
zend_printf("The current line being executed is %i<br>", zend_get_executed_lineno(TSRMLS_C));
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