note 60557 added to function.odbc-binmode
| From: | mizmerize at yahoo dot com | Date: | Wed, 11 Jan 2006 02:59:34 +0000 |
| Subject: | note 60557 added to function.odbc-binmode | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-101525@lists.php.net to get a copy of this message | ||
I am currently using an SQL Server 2000 used as a datasource for ODBC access, Testing PHP scripts
from an Apache 2 server running on Windows 2000.
I was trying to get an image from the database using ODBC but the output always flushes
automatically while I was just getting the result using odbc_result() function.
With this code, the picture automatically prints to the browser as soon as I hit odbc_result()
(probably a bug, but bug reports aren't that easy to do).
<?php
$connH=odbc_pconnect("ImageDB","sa","",SQL_CUR_USE_IF_NEEDED) or
die(odbc_errormsg());
$result=odbc_exec($connH, "SELECT Emp_Image FROM tblEmployeePics WHERE Emp_Id=547");
if ($result) {
odbc_longreadlen($result, 131072);
odbc_binmode($result,ODBC_BINMODE_PASSTHRU);
//upon calling this, the output flushes out to the browser... made me scratch
$m_FValue=odbc_result($result, 1);
}
?>
...after 48 hours of scratching I finally made a work around, but by using a function in the
bin2hex() function documentation...
<?php
function hex2bin($data){
$len = strlen($data);
return pack("H" . $len, $data);
}
$connH=odbc_pconnect("ImageDB","sa","",SQL_CUR_USE_IF_NEEDED) or
die(odbc_errormsg());
$result=odbc_exec($connH, "SELECT Emp_Image FROM tblEmployeePics WHERE Emp_Id=547");
if ($result) {
odbc_longreadlen($result, 131072);
odbc_binmode($result,ODBC_BINMODE_CONVERT);
$m_FValue=odbc_result($result, 1);
$out=hex2bin($m_FValue);
}
?>
The trick was to convert the output into hex by changing odbc_binmode to ODBC_BINMODE_CONVERT and
using a handy function to convert it back to binary in order to facilitate manipulation of its size,
depth etc...
----
Manual Page -- http://www.php.net/manual/en/function.odbc-binmode.php
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