Bug #1418: REQUIRE function is outputting a byte into stream.

From: rod@23net.net Operating system: UNIX PHP version: 3.0.7 PHP Bug Type: Misbehaving function Bug description: REQUIRE function is outputting a byte into stream. Compilation definitions: MYSQL_INCLUDE=-I/usr/local/mysql/include MYSQL_LFLAGS=-Wl,-rpath,/usr/local/mysql/lib -L/usr/local/mysql/lib MYSQL_LIBS=-lmysqlclient APACHE_INCLUDE=-I../apache_1.3.6/src/include -I../apache_1.3.6/src/os/unix APACHE_TARGET=../apache_1.3.6/src/modules/php3 Apache Version: Apache/1.3.6 Apache Release: 10306100 Apache API Version: 19990320 Hostname/port: 23net.net:80 User/Group: www(502)/502 Max Requests: per child: 100 keep alive: on max per connection: 100 Timeouts: connection: 300 keep-alive: 15 Server Root: /etc/httpd Loaded modules: mod_php3, mod_frontpage, mod_setenvif, mod_auth, mod_access, mod_alias, mod_userdir, mod_actions, mod_imap, mod_asis, mod_cgi, mod_dir, mod_autoindex, mod_include, mod_status, mod_negotiation, mod_mime, mod_log_config, mod_env, http_core I use a script on each page to verify sessions. It verifies the length of time since last activity and that the remote address has not changed. If either condition is not met the user must relogin. The start of the script is: <? /* header.inc */ header("Expires: Mon, 26 Jul 1998 05:00:00 GMT"); header("Last-Modified: " . gmdate("D, d M Y H;i:s") . "GMT"); header("Cache-Control: no-cache, must-revalidate"); header("Pragma: no-cache"); Require ("includes/verifylogin.inc"); Require ("includes/dbfunctions.inc"); $db="xxxxx"; $linkid=OpenCnct(); SelectDB($linkid,$db); VerifyUser($p,$db); PRINT "<HTML><HEAD><TITLE>$pagename</TITLE></HEAD>"; The problem is that the "VerifyUser" function wouldn't execute a header contained within the function. When I called the page thru Netscape it would inform me that the content length was 1. (the byte was not a visible character. In an attempt to find out where the offending byte was coming from I placed exit; in various locations in the script. An exit; at any point prior to "Require ("includes/dbfunctions.inc")" resulted in "Document contains no data." An exit; after that line gave me the 1 byte. I placed exits inside the required file and always got "Document contains no data" including an exit before the closing "?>" in the file. I changed the REQUIRE to INCLUDE and the script functioned correctly. Somehow the REQUIRE function itself was adding the byte! If you'd like to see more info on my configuration I have PHPINFO() set up at http://www.23net.net/test3.php3 I do not have access to the php3.ini file on my host. This is a copy of the dbfunctions.inc file: <? /* dbfunctions.inc */ function OpenDB($host="localhost",$name="xxx",$pw="xxx"){ $linkid=mysql_pconnect($host,$name,$pw); return $linkid; } function SelectDB($linkid,$db="xxx"){ $result=mysql_select_db($db,$linkid); } function VerifyUser($p,$db){ $result=mysql_db_query($db,"Select lastaddr,lastused from users where uid=$p"); $numrows=mysql_num_rows($result); } list($lastaddr,$lastused)=mysql_fetch_row($result); $remoteaddr=GETENV(REMOTE_ADDR); IF ($remoteaddr!=$lastaddr){ $ref=getenv(SCRIPT_NAME); header("Location: https://server9000.net/23net/signin.php3?err=4&ref=$ref"); exit; } $result=mysql_db_query($db,"Select NOW()+0"); $now=mysql_fetch_row($result); IF ($now[0]>$lastused+1000){ $ref=getenv(SCRIPT_NAME); header("Location: https://server9000.net/23net/signin.php3?err=4&ref=$ref"); exit; } $result=mysql_db_query($db,"update users set lastused=null where uid=$p"); } function GetUserName($p,$db){ $result=mysql_db_query($db,"select uname from users where uid=$p"); $user=mysql_fetch_row($result); return $user[0]; } ?> Rod Kreisler -- PHP Development Mailing List http://www.php.net/ To unsubscribe send an empty message to php-dev-unsubscribe@lists.php.net For help: php-dev-help@lists.php.net