soap: Get decompression function directly from function table and call it

The code is already looking up the entry in the function table anyway,
so might as well use it directly.
This simplifies the code and avoids a redundant lookup.

Author: ndossche

ext/soap/php_http.c

@@ -1294,20 +1294,18 @@ int make_http_soap_request(zval        *this_ptr,
 	/* Decompress response */
 	content_encoding = get_http_header_value(ZSTR_VAL(http_headers), "Content-Encoding:");
 	if (content_encoding) {
-		zval func;
 		zval retval;
 		zval params[1];
+		zend_function *decompression_fn;
 
 		/* Warning: the zlib function names are chosen in an unfortunate manner.
 		 * Check zlib.c to see how a function corresponds with a particular format. */
 		if ((strcmp(content_encoding,"gzip") == 0 ||
 		     strcmp(content_encoding,"x-gzip") == 0) &&
-		     zend_hash_str_exists(EG(function_table), "gzdecode", sizeof("gzdecode")-1)) {
-			ZVAL_STRING(&func, "gzdecode");
+		     (decompression_fn = zend_hash_str_find_ptr(EG(function_table), "gzdecode", sizeof("gzdecode")-1))) {
 			ZVAL_STR_COPY(&params[0], http_body);
 		} else if (strcmp(content_encoding,"deflate") == 0 &&
-		           zend_hash_str_exists(EG(function_table), "gzuncompress", sizeof("gzuncompress")-1)) {
-			ZVAL_STRING(&func, "gzuncompress");
+		           (decompression_fn = zend_hash_str_find_ptr(EG(function_table), "gzuncompress", sizeof("gzuncompress")-1))) {
 			ZVAL_STR_COPY(&params[0], http_body);
 		} else {
 			efree(content_encoding);
@@ -1319,15 +1317,13 @@ int make_http_soap_request(zval        *this_ptr,
 			add_soap_fault(this_ptr, "HTTP", "Unknown Content-Encoding", NULL, NULL, SOAP_GLOBAL(lang_en));
 			return FALSE;
 		}
-		if (call_user_function(CG(function_table), (zval*)NULL, &func, &retval, 1, params) == SUCCESS &&
-		    Z_TYPE(retval) == IS_STRING) {
+		zend_call_known_function(decompression_fn, NULL, NULL, &retval, 1, params, NULL);
+		if (Z_TYPE(retval) == IS_STRING) {
 			zval_ptr_dtor(&params[0]);
-			zval_ptr_dtor(&func);
 			zend_string_release_ex(http_body, 0);
 			ZVAL_COPY_VALUE(return_value, &retval);
 		} else {
 			zval_ptr_dtor(&params[0]);
-			zval_ptr_dtor(&func);
 			zval_ptr_dtor(&retval);
 			efree(content_encoding);
 			zend_string_release_ex(http_headers, 0);