substr_count returns non-negative integer

resources/functionMap.php

@@ -6364,7 +6364,7 @@
 'mb_strwidth' => ['int', 'str'=>'string', 'encoding='=>'string'],
 'mb_substitute_character' => ['mixed', 'substchar='=>'mixed'],
 'mb_substr' => ['string', 'str'=>'string', 'start'=>'int', 'length='=>'?int', 'encoding='=>'string'],
-'mb_substr_count' => ['int', 'haystack'=>'string', 'needle'=>'string', 'encoding='=>'string'],
+'mb_substr_count' => ['0|positive-int', 'haystack'=>'string', 'needle'=>'string', 'encoding='=>'string'],
 'mcrypt_cbc' => ['string', 'cipher'=>'string', 'key'=>'string', 'data'=>'string', 'mode'=>'int', 'iv='=>'string'],
 'mcrypt_cfb' => ['string', 'cipher'=>'string', 'key'=>'string', 'data'=>'string', 'mode'=>'int', 'iv='=>'string'],
 'mcrypt_create_iv' => ['string', 'size'=>'int', 'source='=>'int'],
@@ -11805,7 +11805,7 @@
 'strval' => ['string', 'var'=>'mixed'],
 'substr' => ['string', 'string'=>'string', 'start'=>'int', 'length='=>'int'],
 'substr_compare' => ['int|false', 'main_str'=>'string', 'str'=>'string', 'offset'=>'int', 'length='=>'int', 'case_sensitivity='=>'bool'],
-'substr_count' => ['int', 'haystack'=>'string', 'needle'=>'string', 'offset='=>'int', 'length='=>'int'],
+'substr_count' => ['0|positive-int', 'haystack'=>'string', 'needle'=>'string', 'offset='=>'int', 'length='=>'int'],
 'substr_replace' => ['string|array', 'str'=>'string|array', 'repl'=>'mixed', 'start'=>'mixed', 'length='=>'mixed'],
 'suhosin_encrypt_cookie' => ['string', 'name'=>'string', 'value'=>'string'],
 'suhosin_get_raw_cookies' => ['array'],