my script "redirect.php":
<?php
fclose(STDOUT);
?>

Results:
% phpdbg -e redirect.php
phpdbg> r
[Attempting compilation of some_path/redirect.php]
[Success]
[PHP Warning: fclose() expects parameter 1 to be resource, string given in some_path/redirect.php on line 2]

N.B. The script Works fine wtih PHP 5.1.6 and PHP 5.6.0-beta1

with php alone, the same error occurs when replacing "STDOUT" with "stdout": fclose(stdout)
the phpdbg compiler generates the error when translating the function arguments to lowercase.