how can I get the members of the zval's hashtable

Thank you for view my mail. I have a problem in my development of php mod extention,that:

    I write a php extention function used by the php script, in the function implementation in the extension module, i accept an array parameter from the php script by the "zval",and when i want to get the members in the array ,i encounter just one function suppled by zend macro "Z_LVAL_P(zval)",this macro just return the hashtable in the zval containing the members of the array, i have read through the php_manual, but haven't found the macro or function which i really  need, so please give me a hand , how can i get the members of zval's hashtable , macros or functioins OK.  
                                                         
                                                                  Thanks a lot.

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