Description:
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The documented behavior of oci_fetch_all() says it will return FALSE on failure.  However, it appears to return NULL instead.  This NULL behavior actually matches the failure behavior of other oci_fetch_*() methods, although those methods do not have a failure return value documented at all.

Presumably you want to either correct the documented behavior of oci_fetch_all(), or perhaps remove "failure behavior" from the its doc completely.

Test script:
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$ret = 'before call';
$ret = oci_fetch_all(null);
var_dump($ret);

Expected result:
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Warning: oci_fetch_all() expects at least 2 parameters, 1 given in /home/cburgess/test.php on line 4

Call Stack:
    0.0002     221104   1. {main}() /home/cburgess/test.php:0
    0.0002     221896   2. oci_fetch_all() /home/cburgess/test.php:4

FALSE

Actual result:
--------------
Warning: oci_fetch_all() expects at least 2 parameters, 1 given in /home/cburgess/test.php on line 4

Call Stack:
    0.0002     221104   1. {main}() /home/cburgess/test.php:0
    0.0002     221896   2. oci_fetch_all() /home/cburgess/test.php:4

NULL