/**
* Determines the system's upload limit. This limit is determined by
* the maximum upload filesize (PHP), the maximum POST request size (PHP)
* and the maximum database packet size.
*
* @return An array containing three elements: the overall system's maximum
* upload size, the maximum as imposed by PHP and the maximum as
* imposed by the database.
*/
function phorum_get_system_max_upload()
{
global $PHORUM;
// Determine limit as imposed by PHP.
$pms = phorum_phpcfgsize2bytes(ini_get('post_max_size'));
$umf = phorum_phpcfgsize2bytes(ini_get('upload_max_filesize'));
$php_limit = $umf > $pms ? $pms : $umf;
// Determines the database server's limit for file uploads. This limit
// is determined by the maximum packet size that the database can handle.
// We asume that there's a 40% overhead in the packet, so that 60% of
// the packet can be used for sending an uploaded file to the database.
$db_limit = phorum_db_maxpacketsize();
if ($db_limit != NULL) {
$db_limit = $db_limit * 0.6;
}
$limit = $php_limit;
if ($db_limit && $db_limit < $php_limit) {
$limit = $db_limit;
}
$data = array($limit, $php_limit, $db_limit);
/*
* [hook]
* system_max_upload
*
* [description]
* This hook allows a module to control the maximum file size for
* a file upload. Most notable would be file system storage. It
* could ignore the db_limit.
*
* [category]
* File storage
*
* [when]
* In
* <filename>include/upload_functions.php</filename>,
* in the function phorum_get_system_max_upload.
*
* [input]
* An array containing the default limit, the data layer limit and
* the PHP limit
*
* [output]
* A 3 part array with the limits adjusted as you wish. The first
* element in the array would be the most important.
*
* [example]
* <hookcode>
* function phorum_mod_foo_system_max_upload($data)
* {
* // ignore the db_limit
* $data[0] = $data[2];
* return $data;
* }
* </hookcode>
*/
if (isset($PHORUM["hooks"]["system_max_upload"])) {
$data = phorum_hook("system_max_upload", $data);
}
return $data;
}
/**
* Determines the system's upload limit. This limit is determined by
* the maximum upload filesize (PHP), the maximum POST request size (PHP)
* and the maximum database packet size.
*
* @return An array containing three elements: the overall system's maximum
* upload size, the maximum as imposed by PHP and the maximum as
* imposed by the database.
*/
function phorum_get_system_max_upload()
{
// Determine limit as imposed by PHP.
$pms = phorum_phpcfgsize2bytes(ini_get('post_max_size'));
$umf = phorum_phpcfgsize2bytes(ini_get('upload_max_filesize'));
$php_limit = $umf > $pms ? $pms : $umf;
// Determines the database server's limit for file uploads. This limit
// is determined by the maximum packet size that the database can handle.
// We asume that there's a 40% overhead in the packet, so that 60% of
// the packet can be used for sending an uploaded file to the database.
$db_limit = phorum_db_maxpacketsize();
if ($db_limit != NULL) {
$db_limit = $db_limit * 0.6;
}
$limit = $php_limit;
if ($db_limit && $db_limit < $php_limit) {
$limit = $db_limit;
}
return array($limit, $php_limit, $db_limit);
}
foreach ($_FILES as $file)
{
// Not too many attachments?
if ($attach_count >= $PHORUM["max_attachments"]) break;
// Check if the tempfile is an uploaded file?
if(! is_uploaded_file($file["tmp_name"])) continue;
// Some problems in uploading result in files which are
// zero in size. We asume that people who upload zero byte
// files will almost always have problems uploading.
if ($file["size"] == 0) continue;
// check with PHP and MySQL on attachment size
$php_limit = ini_get('upload_max_filesize')*1024;
$max_packetsize = phorum_db_maxpacketsize();
if ($max_packetsize == NULL) {
$db_limit = $php_limit;
} else {
$db_limit = $max_packetsize/1024*.6;
}
if($PHORUM["max_attachment_size"]==0){
$PHORUM["max_attachment_size"] = min($php_limit, $db_limit);
} else {
$PHORUM["max_attachment_size"] = min($PHORUM["max_attachment_size"], $php_limit, $db_limit);
}
// Isn't the attachment too large?
if ($PHORUM["max_attachment_size"] > 0 &&
$file["size"] > $PHORUM["max_attachment_size"]*1024) {
$PHORUM["DATA"]["ERROR"] = str_replace(
function phorum_check_upload_limits() {
$PHORUM = $GLOBALS["PHORUM"];
// Keep track if uploads are used.
$upload_used = false;
// Get the maximum file upload size for PHP.
$php_max_upload = phorum_php_max_upload();
// Get the maximum packet size for the database.
// For determining the maximum allowed upload size,
// we have to take packet overhead into account.
$max_packetsize = phorum_db_maxpacketsize();
if ($max_packetsize == NULL) {
$db_max_upload = $php_max_upload;
} else {
$db_max_upload = phorum_db_maxpacketsize() * 0.6;
}
// Check limits for file uploading in personal profile.
if ($PHORUM["file_uploads"] && $PHORUM["max_file_size"]) {
$upload_used = true;
$res = phorum_single_check_upload_limits(
$PHORUM["max_file_size"]*1024,
"the Max File Size option for user file uploads " .
"(in their profile)",
$php_max_upload, $db_max_upload
);
if ($res != NULL) return $res;
}
// Check limits for attachment uploading in forums.
$forums = phorum_db_get_forums();
foreach ($forums as $id => $forum) {
if ($forum["max_attachments"] > 0 && $forum["max_attachment_size"]) {
$upload_used = true;
$res = phorum_single_check_upload_limits(
$forum["max_attachment_size"]*1024,
"the Max File Size option for uploading attachments
in the forum \"{$forum['name']}\"",
$php_max_upload, $db_max_upload
);
}
}
// No upload functionality found so far? Then we're done.
if (! $upload_used) return array(PHORUM_SANITY_OK, NULL);
// Check if the upload temp directory can be written.
$tmpdir = get_cfg_var('upload_tmp_dir');
if (!empty($tmpdir)) {
$fp = @fopen("$tmpdir/sanity_checks_dummy_uploadtmpfile", "w");
if (! $fp) return array(
PHORUM_SANITY_CRIT,
"The system is unable to write files
to PHP's upload tmpdir \"".htmlspecialchars($tmpdir)."\".
The system error was:<br/><br/>".
htmlspecialchars($php_errormsg).".",
"Change the upload_tmp_dir setting in your php.ini file
or give your webserver more permissions for the current
upload directory."
);
}
fclose($fp);
unlink("$tmpdir/sanity_checks_dummy_uploadtmpfile");
return array(PHORUM_SANITY_OK, NULL);
}
