This array consecutively contains all functions that are to be made available externally, with the function 's name as it should appear in PHP and its name as defined in the C source.
Now that you have declared the functions to be exported, you also have to introduce them to Zend. Introducing the list of functions is done by using an array of zend_function_entry. This array consecutively contains all functions that are to be made available externally, with the function's name as it should appear in PHP and its name as defined in the C source. Internally, zend_function_entry is defined as shown in 예 31-1.