Description:
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I execute a stored procedure (code listed below). The stored proc does several things, one of which is to fetch the next value in a sequence. It works fine except when the sequence value crossess 999. I tested for all cases by resetting the sequence initial value to 1, 2000, 50000.

The stored procedure works perfectly. No issues. The PHP works fine only when the output paremeter (which is the sequence value) is initialised to a value > 1000

Has anyone come across this before? The sequence has no issues as it has a max limit > 99999999999. I tried to return the sequence value as both number and varchar2, but both have the same issue.

Reproduce code:
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This works for sequence value <1000 but not >= 1000:
$seqid = "";
$sSQL   = "BEGIN sp_name(:seqid); END;"; 
$stmt = oci_parse($conn , $sSQL);
...
oci_execute($stmt, OCI_DEFAULT); -> If ret var is > 999, gives "<b>Warning</b>:  oci_execute() [<a href='function.oci-execute'>function.oci-execute</a>]: ORA-06502: PL/SQL: numeric or value error: character string buffer too small"

This works for all cases:
$seqid = "2000";
$sSQL   = "BEGIN sp_name(:seqid); END;"; 
$stmt = oci_parse($conn , $sSQL);
...
oci_execute($stmt, OCI_DEFAULT);

Expected result:
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Should work fine without needing to initialise $seqid

Actual result:
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Have to initialise $seqid to a value > 1000