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Return value of mb_get_info can be NULL

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This has been the case at least since PHP 5.4. Thanks to Girgias for
pointing it out.

It appears that there are several global variables internal to mbstring
which can be queried via mb_get_info() and which could be NULL, but
at the very least, we know that "mbstring.http_input" is one of them.
This commit is contained in:
Alex Dowad 2023-11-26 17:17:28 +02:00
parent b12c85293d
commit d8ef868b92
4 changed files with 15 additions and 5 deletions
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2
Zend/Optimizer/zend_func_infos.h
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@ -235,7 +235,7 @@ static const func_info_t func_infos[] = {
F1("mb_convert_variables", MAY_BE_STRING|MAY_BE_FALSE),
F1("mb_encode_numericentity", MAY_BE_STRING),
F1("mb_decode_numericentity", MAY_BE_STRING),
F1("mb_get_info", MAY_BE_ARRAY|MAY_BE_ARRAY_KEY_LONG|MAY_BE_ARRAY_KEY_STRING|MAY_BE_ARRAY_OF_LONG|MAY_BE_ARRAY_OF_STRING|MAY_BE_ARRAY_OF_ARRAY|MAY_BE_STRING|MAY_BE_LONG|MAY_BE_FALSE),
F1("mb_get_info", MAY_BE_ARRAY|MAY_BE_ARRAY_KEY_LONG|MAY_BE_ARRAY_KEY_STRING|MAY_BE_ARRAY_OF_LONG|MAY_BE_ARRAY_OF_STRING|MAY_BE_ARRAY_OF_ARRAY|MAY_BE_STRING|MAY_BE_LONG|MAY_BE_FALSE|MAY_BE_NULL),
#if defined(HAVE_MBREGEX)
F1("mb_regex_encoding", MAY_BE_STRING|MAY_BE_BOOL),
#endif

4
ext/mbstring/mbstring.stub.php
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@ -171,10 +171,10 @@ function mb_decode_numericentity(string $string, array $map, ?string $encoding =
function mb_send_mail(string $to, string $subject, string $message, array|string $additional_headers = [], ?string $additional_params = null): bool {}
/**
* @return array<int|string, int|string|array>|string|int|false
* @return array<int|string, int|string|array>|string|int|false|null
* @refcount 1
*/
function mb_get_info(string $type = "all"): array|string|int|false {}
function mb_get_info(string $type = "all"): array|string|int|false|null {}
function mb_check_encoding(array|string|null $value = null, ?string $encoding = null): bool {}

4
ext/mbstring/mbstring_arginfo.h generated
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@ -1,5 +1,5 @@
/* This is a generated file, edit the .stub.php file instead.
* Stub hash: 0c9ac8888b8332557f7098cfb9d259757af8b3c6 */
* Stub hash: 131af756402aecb88d2265f2a3d25aa5c66a7185 */
ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_mb_language, 0, 0, MAY_BE_STRING|MAY_BE_BOOL)
ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, language, IS_STRING, 1, "null")
@ -177,7 +177,7 @@ ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_mb_send_mail, 0, 3, _IS_BOOL, 0)
ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, additional_params, IS_STRING, 1, "null")
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_mb_get_info, 0, 0, MAY_BE_ARRAY|MAY_BE_STRING|MAY_BE_LONG|MAY_BE_FALSE)
ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_mb_get_info, 0, 0, MAY_BE_ARRAY|MAY_BE_STRING|MAY_BE_LONG|MAY_BE_FALSE|MAY_BE_NULL)
ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, type, IS_STRING, 0, "\"all\"")
ZEND_END_ARG_INFO()

10
ext/mbstring/tests/mb_get_info_http_input.phpt Normal file
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@ -0,0 +1,10 @@
--TEST--
mb_get_info("http_input") can return null
--EXTENSIONS--
mbstring
--FILE--
<?php
var_dump(mb_get_info("http_input"));
?>
--EXPECT--
NULL