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Bug #62367 OCI8 statement not fully freed if bind data contains references
Submitted: 2012-06-19 22:53 UTC Modified: 2012-06-19 22:56 UTC
Avg. Score:3.0 ± 0.0
Reproduced:0 of 1 (0.0%)
From: galaxy dot mipt at gmail dot com Assigned:
Status: Open Package: OCI8 related
PHP Version: 5.4.4 OS: Linux
Private report: No CVE-ID: None
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 [2012-06-19 22:53 UTC] galaxy dot mipt at gmail dot com
Probably I miss some point here but anyway - in the test script below bind data is passed to the query() function as an array from pre-created collection.
On each call memory consumption grows by pretty huge value (~65kB) even though oci_free_statement() is called.
The important conditions to reproduce:
  1. Bind array contains references. Without those I get

  2. PL/SQL script actually writes to one of bound variables. With the second (currently commented out) version I get

Test script:
function query($data) {
    global $conn;
    $stid = oci_parse($conn, 'begin select :a + :b into :b from dual; end;');
    //$stid = oci_parse($conn, 'declare j number; begin select :a + :b into j from dual; end;');

    oci_bind_by_name($stid, ':a', $data['a'], 100);
    oci_bind_by_name($stid, ':b', $data['b'], 100);


$conn = oci_connect('user', 'pass', 'dbref');
if (!$conn) {
    $e = oci_error();

$data = array();
for($i = 0; $i < 1000; $i++) {
    $data[] = array(
        "a"   => 1,
        "b"   => 2

print memory_get_usage() . "\n";
for($i = 0; $i < 100; $i++) {
            "a" => &$data[$i]["a"],
            "b" => &$data[$i]["b"]
print memory_get_usage() . "\n";


Expected result:

Actual result:
639520 or nor far from this


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 [2012-06-19 22:56 UTC] galaxy dot mipt at gmail dot com
Oh, I swapped actual and expected results by mistake
 [2020-06-16 09:53 UTC] arajgure at sevenmentor dot com
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 [2020-07-21 13:35 UTC] hrriyasen4 at gmail dot com
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 [2020-08-03 19:22 UTC] bluemap dot training at gmail dot com
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