EG（function_table）Structre的内容

I took a look at the source code of PHP in order to learn a bit.

I came across /PHP_5_2/Zend/zend_builtin_functions.c and saw over there the next line:

 retval = (zend_hash_find(EG(function_table), lcname, Z_STRLEN_PP(function_name)+1, (void **)&func) == SUCCESS);

I'm interested in the next part of this line:

zend_hash_find(EG(function_table), lcname,

I don't know C that well but I can guess that zend_has_find is looking for a value which its key is lcname in the EG(function_table). I know that this EG(function_table) exists in both the compiler and executor globals. Iterating through this hashtable gives you every callable function.

I can't edit my server's php source code , is there a way (or a wiki) of that EG(function_table) structre?

To be more specific , Is there a way to see the information about the functions it contains?

Thanks.