Description:
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---
From manual page: http://www.php.net/function.rewind
---
quote: The file pointer must be valid, and must point to a file successfully opened by fopen().

rewind also works fine on files opened by tmpfile(), so at the very least, the docs should say "opened by fopen() or tmpfile()", if there isn't more. (PS: there is a similar problem with the docs for "ftell")

Test script:
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<?php
$h=tmpfile();
var_dump(ftell($h));
fwrite($h,'PHP');
var_dump(ftell($h));
rewind($h);
var_dump(ftell($h));


Expected result:
----------------
int(0)
int(3)
int(3)

Actual result:
--------------
int(0)
int(3)
int(0)