note 126564 added to function.sha1

The return value is not always "sha1 hash as a string". Specially, the part about "as a string" is not guaranteed if input is malformed. Eg: php > var_dump(sha1(array())); PHP Warning: sha1() expects parameter 1 to be string, array given in php shell code on line 1 NULL ---- Server IP: 45.112.84.4 Probable Submitter: 45.112.85.242 (proxied: 129.151.46.159) ---- Manual Page -- https://php.net/manual/en/function.sha1.php Edit -- https://main.php.net/note/edit/126564 Del: integrated -- https://main.php.net/note/delete/126564/integrated Del: useless -- https://main.php.net/note/delete/126564/useless Del: bad code -- https://main.php.net/note/delete/126564/bad+code Del: spam -- https://main.php.net/note/delete/126564/spam Del: non-english -- https://main.php.net/note/delete/126564/non-english Del: in docs -- https://main.php.net/note/delete/126564/in+docs Del: other reasons-- https://main.php.net/note/delete/126564 Reject -- https://main.php.net/note/reject/126564 Search -- https://main.php.net/manage/user-notes.php