Fix arg/func info

 * mysqli_get_server_info() cannot return null. The underlying API
   is infallible.
 * mysqli_select_db() func info is redundant.
 * mb_detect_order() can only return array|true, not array|false.

Also make the func_info.phpt test that is supposed to catch these
kinds of issues actually work.

Author: nikic

ext/mysqli/mysqli.stub.php

@@ -609,7 +609,7 @@ function mysqli_get_host_info(mysqli $mysqli_link): string {}
 
 function mysqli_get_proto_info(mysqli $mysqli_link): int {}
 
-function mysqli_get_server_info(mysqli $mysqli_link): ?string {}
+function mysqli_get_server_info(mysqli $mysqli_link): string {}
 
 function mysqli_get_server_version(mysqli $mysqli_link): int {}
 

ext/mysqli/mysqli_api.c

@@ -1403,17 +1403,13 @@ PHP_FUNCTION(mysqli_get_server_info)
 {
 	MY_MYSQL	*mysql;
 	zval		*mysql_link = NULL;
-	const char	*info;
 
 	if (zend_parse_method_parameters(ZEND_NUM_ARGS(), getThis(), "O", &mysql_link, mysqli_link_class_entry) == FAILURE) {
 		RETURN_THROWS();
 	}
 	MYSQLI_FETCH_RESOURCE_CONN(mysql, mysql_link, MYSQLI_STATUS_VALID);
 
-	info = mysql_get_server_info(mysql->mysql);
-	if (info) {
-		RETURN_STRING(info);
-	}
+	RETURN_STRING(mysql_get_server_info(mysql->mysql));
 }
 /* }}} */
 

ext/mysqli/mysqli_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 49567a0e831c0a484aaf2c2d213ad24109f2639b */
+ * Stub hash: cde1bbb449c6adae7a99c7df3e9d290d501e18be */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_mysqli_affected_rows, 0, 1, MAY_BE_LONG|MAY_BE_STRING)
 	ZEND_ARG_OBJ_INFO(0, mysql_link, mysqli, 0)
@@ -162,9 +162,7 @@ ZEND_END_ARG_INFO()
 
 #define arginfo_mysqli_get_proto_info arginfo_mysqli_field_count
 
-ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_mysqli_get_server_info, 0, 1, IS_STRING, 1)
-	ZEND_ARG_OBJ_INFO(0, mysqli_link, mysqli, 0)
-ZEND_END_ARG_INFO()
+#define arginfo_mysqli_get_server_info arginfo_mysqli_get_host_info
 
 #define arginfo_mysqli_get_server_version arginfo_mysqli_field_count
 
@@ -175,7 +173,9 @@ ZEND_END_ARG_INFO()
 ZEND_BEGIN_ARG_WITH_RETURN_OBJ_TYPE_MASK_EX(arginfo_mysqli_init, 0, 0, mysqli, MAY_BE_FALSE)
 ZEND_END_ARG_INFO()
 
-#define arginfo_mysqli_info arginfo_mysqli_get_server_info
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_mysqli_info, 0, 1, IS_STRING, 1)
+	ZEND_ARG_OBJ_INFO(0, mysqli_link, mysqli, 0)
+ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_mysqli_insert_id, 0, 1, MAY_BE_LONG|MAY_BE_STRING)
 	ZEND_ARG_OBJ_INFO(0, mysqli_link, mysqli, 0)
@@ -377,7 +377,7 @@ ZEND_END_ARG_INFO()
 
 #define arginfo_mysqli_stmt_sqlstate arginfo_mysqli_stmt_error
 
-#define arginfo_mysqli_sqlstate arginfo_mysqli_get_server_info
+#define arginfo_mysqli_sqlstate arginfo_mysqli_info
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_mysqli_ssl_set, 0, 6, _IS_BOOL, 0)
 	ZEND_ARG_OBJ_INFO(0, mysql_link, mysqli, 0)

ext/opcache/Optimizer/zend_func_info.c

@@ -489,7 +489,6 @@ static const func_info_t func_infos[] = {
 	F0("mysqli_stmt_data_seek",					MAY_BE_NULL | MAY_BE_FALSE),
 	F1("mysqli_stmt_insert_id",					MAY_BE_LONG | MAY_BE_STRING),
 	F1("mysqli_stmt_num_rows",					MAY_BE_LONG | MAY_BE_STRING),
-	F0("mysqli_select_db",						MAY_BE_FALSE | MAY_BE_TRUE),
 	F1("mysqli_sqlstate",						MAY_BE_NULL | MAY_BE_STRING),
 	F0("mysqli_ssl_set",						MAY_BE_TRUE),
 	F1("mysqli_stat",							MAY_BE_FALSE | MAY_BE_STRING),
@@ -523,7 +522,7 @@ static const func_info_t func_infos[] = {
 	F1("mb_internal_encoding",                  MAY_BE_FALSE | MAY_BE_TRUE | MAY_BE_STRING),
 	F1("mb_http_input",                         MAY_BE_FALSE | MAY_BE_STRING| MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_LONG | MAY_BE_ARRAY_OF_STRING),
 	F1("mb_http_output",                        MAY_BE_FALSE | MAY_BE_TRUE | MAY_BE_STRING),
-	F1("mb_detect_order",                       MAY_BE_FALSE | MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_LONG | MAY_BE_ARRAY_OF_STRING),
+	F1("mb_detect_order",                       MAY_BE_TRUE | MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_LONG | MAY_BE_ARRAY_OF_STRING),
 	F1("mb_substitute_character",               MAY_BE_FALSE | MAY_BE_TRUE | MAY_BE_LONG | MAY_BE_STRING),
 	F1("mb_output_handler",                     MAY_BE_STRING),
 	F1("mb_preferred_mime_name",                MAY_BE_FALSE | MAY_BE_STRING),

ext/opcache/tests/func_info.phpt

@@ -13,7 +13,10 @@ $contents = "<?php\n";
 
 $contents .= "function test() {\n";
 foreach (get_defined_functions()["internal"] as $function) {
-    $contents .= "    {$function}();\n";
+    if (in_array($function, ["extract", "compact", "get_defined_vars"])) {
+        continue;
+    }
+    $contents .= "    \$result = {$function}();\n";
 }
 $contents .= "}\n";