Expect appropriate parameter type in the first place

`mb_encode_numericentity()` and `mb_decode_numericentity()` accepted
arbitrary zvals as `$convmap`, but ignored anything else than arrays.
This appears to be an unresolved relict of their ZPP conversion for
PHP 5.3[1].  We now expect an array in the first place.

We also expect `count($convmap)` to be a multiple of four (else we
throw a `ValueError`), and do no longer special case empty `$convmap`.

[1] <http://git.php.net/?p=php-src.git;a=commit;h=1c77f594294aee9d60e7309279c616c01c39ba9d>

1 files changed, 2 insertions, 2 deletions

diff --git a/ext/mbstring/mbstring.stub.php b/ext/mbstring/mbstring.stub.php
index fafc4967af..ed017a3fa2 100644
--- a/ext/mbstring/mbstring.stub.php
+++ b/ext/mbstring/mbstring.stub.php
@@ -112,10 +112,10 @@ function mb_convert_kana(string $str, string $option = UNKNOWN, string $encoding
 function mb_convert_variables(string $to, $from, &$var, &...$vars) {}
 
 /** @return string|false */
-function mb_encode_numericentity(string $string, $convmap, string $encoding = UNKNOWN, bool $is_hex = false) {}
+function mb_encode_numericentity(string $string, array $convmap, string $encoding = UNKNOWN, bool $is_hex = false) {}
 
 /** @return string|false */
-function mb_decode_numericentity(string $string, $convmap, string $encoding = UNKNOWN) {}
+function mb_decode_numericentity(string $string, array $convmap, string $encoding = UNKNOWN) {}
 
 function mb_send_mail(string $to, string $subject, string $message, $additional_headers = UNKNOWN, string $additional_parameters = UNKNOWN): bool {}