dbqueries = 0; $PERF->logwrites = 0; if (function_exists('microtime')) { $PERF->starttime = microtime(); } if (function_exists('memory_get_usage')) { $PERF->startmemory = memory_get_usage(); } if (function_exists('posix_times')) { $PERF->startposixtimes = posix_times(); } if (function_exists('apd_set_pprof_trace')) { // APD profiling if ($USER->id > 0 && $CFG->perfdebug >= 15) { $tempdir = $CFG->dataroot . '/temp/profile/' . $USER->id; mkdir($tempdir); apd_set_pprof_trace($tempdir); $PERF->profiling = true; } } } /** * Function to raise the memory limit to a new value. * Will respect the memory limit if it is higher, thus allowing * settings in php.ini, apache conf or command line switches * to override it * * The memory limit should be expressed with a string (eg:'64M') * * @param string $newlimit the new memory limit * @return bool */ function raise_memory_limit ($newlimit) { if (empty($newlimit)) { return false; } $cur = @ini_get('memory_limit'); if (empty($cur)) { // if php is compiled without --enable-memory-limits // apparently memory_limit is set to '' $cur=0; } else { if ($cur == -1){ return true; // unlimited mem! } $cur = get_real_size($cur); } $new = get_real_size($newlimit); if ($new > $cur) { ini_set('memory_limit', $newlimit); return true; } return false; } /** * Function to reduce the memory limit to a new value. * Will respect the memory limit if it is lower, thus allowing * settings in php.ini, apache conf or command line switches * to override it * * The memory limit should be expressed with a string (eg:'64M') * * @param string $newlimit the new memory limit * @return bool */ function reduce_memory_limit ($newlimit) { if (empty($newlimit)) { return false; } $cur = @ini_get('memory_limit'); if (empty($cur)) { // if php is compiled without --enable-memory-limits // apparently memory_limit is set to '' $cur=0; } else { if ($cur == -1){ return true; // unlimited mem! } $cur = get_real_size($cur); } $new = get_real_size($newlimit); // -1 is smaller, but it means unlimited if ($new < $cur && $new != -1) { ini_set('memory_limit', $newlimit); return true; } return false; } /** * Converts numbers like 10M into bytes. * * @param mixed $size The size to be converted * @return mixed */ function get_real_size($size=0) { if (!$size) { return 0; } $scan['MB'] = 1048576; $scan['Mb'] = 1048576; $scan['M'] = 1048576; $scan['m'] = 1048576; $scan['KB'] = 1024; $scan['Kb'] = 1024; $scan['K'] = 1024; $scan['k'] = 1024; while (list($key) = each($scan)) { if ((strlen($size)>strlen($key))&&(substr($size, strlen($size) - strlen($key))==$key)) { $size = substr($size, 0, strlen($size) - strlen($key)) * $scan[$key]; break; } } return $size; } /** * Create a directory. * * @uses $CFG * @param string $directory a string of directory names under $CFG->dataroot eg stuff/assignment/1 * param bool $shownotices If true then notification messages will be printed out on error. * @return string|false Returns full path to directory if successful, false if not */ function make_upload_directory($directory, $shownotices=true) { global $CFG; $currdir = $CFG->dataroot; umask(0000); if (!file_exists($currdir)) { if (! mkdir($currdir, $CFG->directorypermissions)) { if ($shownotices) { echo '
ERROR: You need to create the directory '. $currdir .' with web server write access
'."
\n"; } return false; } } // Make sure a .htaccess file is here, JUST IN CASE the files area is in the open if (!file_exists($currdir.'/.htaccess')) { if ($handle = fopen($currdir.'/.htaccess', 'w')) { // For safety @fwrite($handle, "deny from all\r\nAllowOverride None\r\nNote: this file is broken intentionally, we do not want anybody to undo it in subdirectory!\r\n"); @fclose($handle); } } $dirarray = explode('/', $directory); foreach ($dirarray as $dir) { $currdir = $currdir .'/'. $dir; if (! file_exists($currdir)) { if (! mkdir($currdir, $CFG->directorypermissions)) { if ($shownotices) { echo '
ERROR: Could not find or create a directory ('. $currdir .')
'."
\n"; } return false; } //@chmod($currdir, $CFG->directorypermissions); // Just in case mkdir didn't do it } } return $currdir; } /** * This function will introspect inside DB to detect it it's a UTF-8 DB or no * Used from setup.php to set correctly "set names" when the installation * process is performed without the initial and beautiful installer */ function setup_is_unicodedb() { global $CFG, $db, $INSTALL; $unicodedb = false; // Calculate $CFG->dbfamily $dbfamily = set_dbfamily(); switch ($dbfamily) { case 'mysql': $rs = $db->Execute("SHOW LOCAL VARIABLES LIKE 'character_set_database'"); if ($rs && !$rs->EOF) { // rs_EOF() not available yet $records = $rs->GetAssoc(true); $encoding = $records['character_set_database']['Value']; if (strtoupper($encoding) == 'UTF8') { $unicodedb = true; } } break; case 'postgres': /// Get PostgreSQL server_encoding value $rs = $db->Execute("SHOW server_encoding"); if ($rs && !$rs->EOF) { // rs_EOF() not available yet $encoding = $rs->fields['server_encoding']; if (strtoupper($encoding) == 'UNICODE' || strtoupper($encoding) == 'UTF8') { $unicodedb = true; } } break; case 'mssql': /// MSSQL only runs under UTF8 + the proper ODBTP driver (both for Unix and Win32) $unicodedb = true; break; case 'oracle': /// Get Oracle DB character set value $rs = $db->Execute("SELECT parameter, value FROM nls_database_parameters where parameter = 'NLS_CHARACTERSET'"); if ($rs && !$rs->EOF) { // rs_EOF() not available yet $encoding = $rs->fields['value']; if (strtoupper($encoding) == 'AL32UTF8') { $unicodedb = true; } } break; } return $unicodedb; } /** * This internal function sets and returns the proper value for $CFG->dbfamily based on $CFG->dbtype * It's called by preconfigure_dbconnection() and at install time. Shouldn't be used * in other places. Code should rely on dbfamily to perform conditional execution * instead of using dbtype directly. This allows quicker adoption of different * drivers going against the same DB backend. * * This function must contain the init code needed for each dbtype supported. * * return string dbfamily value (mysql, postgres, oracle, mssql) */ function set_dbfamily() { global $CFG, $INSTALL; // Since this function is also used during installation process, i.e. during install.php before $CFG->dbtype is set. // we need to get dbtype from the right variable if (!empty($INSTALL['dbtype'])) { $dbtype = $INSTALL['dbtype']; } else { $dbtype = $CFG->dbtype; } switch ($dbtype) { case 'mysql': case 'mysqli': $CFG->dbfamily='mysql'; break; case 'postgres7': $CFG->dbfamily='postgres'; break; case 'mssql': case 'mssql_n': case 'odbc_mssql': $CFG->dbfamily='mssql'; break; case 'oci8po': $CFG->dbfamily='oracle'; break; } return $CFG->dbfamily; } /** * This internal function, called from setup.php BEFORE stabilishing the DB * connection, defines the $CFG->dbfamily global -by calling set_dbfamily()- * and predefines some constants needed by ADOdb to switch some default * behaviours. * * This function must contain all the pre-connection code needed for each * dbtype supported. */ function preconfigure_dbconnection() { global $CFG; /// Define dbfamily set_dbfamily(); /// Based on $CFG->dbfamily, set some ADOdb settings switch ($CFG->dbfamily) { /// list here family types where we know /// the fieldnames will come in lowercase /// so we can avoid expensive tolower() case 'postgres': case 'mysql': case 'mssql': define ('ADODB_ASSOC_CASE', 2); break; case 'oracle': define ('ADODB_ASSOC_CASE', 0); /// Use lowercase fieldnames for ADODB_FETCH_ASSOC /// (only meaningful for oci8po, it's the default /// for other DB drivers so this won't affect them) /// Row prefetching uses a bit of memory but saves a ton /// of network latency. With current AdoDB and PHP, only /// Oracle uses this setting. define ('ADODB_PREFETCH_ROWS', 1000); break; default: /// if we have to lowercase it, set to 0 /// - note that the lowercasing is very expensive define ('ADODB_ASSOC_CASE', 0); //Use lowercase fieldnames for ADODB_FETCH_ASSOC } } function init_memcached() { global $CFG, $MCACHE; include_once($CFG->libdir . '/memcached.class.php'); $MCACHE = new memcached; if ($MCACHE->status()) { return true; } unset($MCACHE); return false; } function init_eaccelerator() { global $CFG, $MCACHE; include_once($CFG->libdir . '/eaccelerator.class.php'); $MCACHE = new eaccelerator; if ($MCACHE->status()) { return true; } unset($MCACHE); return false; } ?>