Hi Again,
Following the suggestions I received from a earlier post, I've closed
the statement
while ($stmt->fetch(PDO::FETCH_BOUND))
before $stmt = NULL;
I don't get an error anymore, but still retrieve only one record.
To check that the array was being filled correctly, I inserted in several places
$ncand = count($_SESSION['numberCand']);
$ndocid = count($_SESSION['DOCIDs']);
and the count is always 0 for $ndocid and 1 for $ncand.
Now I believe that the array is not being filled, and that's why only the last record gets processed.
Can anybody see what I'm doing wrong in the for each statement? The updated code is below.
Thank you for your help.
Catherine
Earlier message:
I'm really in need of help. I'm not a PHP programmer, but I've been
given the privilege of customizing a script written by somebody else and
can't get it to work right. I have to query 2 different tables in 2
different Oracle 10G DBs, one's mine (my_schema.my_table), the other
(otherdb.other_table) belongs to another department. In my_table, I
have the doc_id and the app_id for a record. In other_table there's the
doc_id and pdf to retrieve. The goal is to make a PDF file from each
BLOB in other_table and store them in the right directory under
hash(app_id). PDO has been installed and working, and I can connect to
both DBs without a problem. If my query limits the retrieval to one
record, the script works, but if I try to run it for all records, one
pdf file is correctly created in the right directory then I get the
following error: PHP Fatal error: Call to a member function fetch() on
a non-object in /my_location/my_script.php on line 154. It the "while
($stmt->fetch(PDO::FETCH_BOUND))" line. I've pasted my script below. I
thought my problem was that maybe I was in the wrong directory after
creation of the first pdf, but several tries changing the directory
didn't make a difference. Right now, I'm running the script at the
command line. Soon I'm going to have a few hundred records to deal with
and cannot do it one by one! Any help would be very much appreciated.
Thank you!
<?php
/* First Oracle DB connection info removed */
try
{
$dbh1 = new PDO("oci:dbname=".$tns1,$db1_username,$db1_password);
}
catch(PDOException $e)
{
echo ($e->getMessage());
exit;
}
if (empty($_SESSION['docIDs']))
{
$_SESSION['DOCIDs'] = array();
$_SESSION['msgs'] = array();
$sql = "SELECT COUNT(*) all_rec FROM myschema.mytable
where academic_year = 2010";
$_SESSION['numberCand'] = 0; /* initialize ctr for stack popping */
$_SESSION['PHPulled'] = 0; /* number new personal histories pulled */
if ($res = $dbh1->query($sql))
{
/* Check the number of rows that match the SELECT statement */
if ($res->fetchColumn() > 0)
{
/* Issue the real SELECT statement and work with the results */
$sql = "select doc_id, app_id
from myschema.mytable
where academic_year = 2010";
foreach ($dbh1->query($sql) as $row)
{
$cand = array();
$cand['DOC_ID']= $row['DOC_ID'];
$cand['APP_ID'] = $row['APP_ID'];
$_SESSION['DOC_IDS'][] = $cand;
}
}
$ncand = count($_SESSION['numberCand']);
$ndocid = count($_SESSION['DOCIDs']);
print "Cand Number: " . $ncand . "\n";
print "DOCid Number: " . $ndocid . "\n";
}
}
if (!empty($_SESSION['DOC_IDS']) and $_SESSION['numberCand'] < count($_SESSION['DOC_IDS']))
{
$ncand = count($_SESSION['numberCand']);
$ndocid = count($_SESSION['DOCIDs']);
print "Cand Number: " . $ncand . "\n";
print "DOCid Number: " . $ndocid . "\n";
/* if have doc_IDs, pick next one off array */
$cand = $_SESSION['DOC_IDS'][$_SESSION['numberCand']];
if ($cand['DOC_ID'] == 0)
{ /* redirect to self to get next candidate with updated numberCand */
$_SESSION['numberCand'] = $_SESSION['numberCand'] + 1;
exit;
}
$dirname = md5($cand['APP_ID']);
$curdir = '/my_location/'.$dirname;
print "App_id/Dir: " . $row['APP_ID'] . $curdir . "\n";
if (!(is_dir($curdir)))
{
if (!mkdir($curdir,0775))
print "error: " . $curdir . "\n";
exit;
}
/* Second Oracle DB connection info removed */
try
{
$dbh2 = new PDO("oci:dbname=".$tns2,$db2_username,$db2_password);
}
catch(PDOException $e)
{
echo ($e->getMessage());
exit;
}
$stmt = $dbh2->prepare('select PERSONAL_HIST_PDF_CONTENT from otherdb.other_table
where DOC_ID = :id');
$stmt->bindParam(':id', $cand['DOC_ID'], PDO::PARAM_INT);
$stmt->bindColumn(1, $PDF, PDO::PARAM_LOB);
$stmt->execute();
if (!(chdir($curdir)))
{
$_SESSION['msgs'][] = 'Could not change to '.$curdir;
continue;
}
$cnt = 0;
while ($stmt->fetch(PDO::FETCH_BOUND))
{
$filename = 'phs-'.$cnt.'.pdf';
if (!file_exists($filename))
{ /* if file not already there, write file with BLOB contents */
$fh = fopen($filename, 'w');
fwrite($fh, stream_get_contents($PDF));
fclose($fh);
/* add to $_SESSION['PHPulled'] for each new file saved */
$_SESSION['PHPulled'] = $_SESSION['PHPulled'] + 1;
}
}
/* increment stack counter */
$_SESSION['numberCand'] = $_SESSION['numberCand'] + 1;
$stmt = NULL; /* release the connection */
/*if not done with stack, redirect to self to get next*/
if (!empty($_SESSION['DOCIDs']) and
$_SESSION['numberCand'] < count($_SESSION['DOCIDs']))
{
exit;
}
}
/* once done, go back to display search page after clearing stack*/
if(isset($_SESSION['DOCIDs']))
unset($_SESSION['DOCIDs'] );
$_SESSION['msgs'][] = 'For '.$_SESSION['numberCand'].' candidate(s), '.
$_SESSION['PHPulled'].' personal histories were loaded.';
exit;
$res = null;
$dbh1 = null;
?>
--
Catherine Madsen
Programmer Analyst
College of Chemistry
Berkeley, CA 94720-1460
TEL: 510-643-1706
FAX: 510-643-6178
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