to_xml_null        53 ext/soap/php_encoding.c static xmlNodePtr to_xml_null(encodeTypePtr type, zval *data, int style, xmlNodePtr parent TSRMLS_DC);
to_xml_null       150 ext/soap/php_encoding.c 	{{IS_NULL, "nil", XSI_NAMESPACE, NULL}, to_zval_null, to_xml_null},