Two files are below, followed by phpinfo() output:

$ cat test1.php
<?php
        ob_start('ob_gzhandler');
        session_start() ;
?>
<html>
<head>
        <title>SID=<?= SID ?></title>
</head>
<body>
        <a href="test2.php">Test2</a>
</body>
</html>
<?php
        ob_flush() ;
        session_write_close() ;
?>
$ cat test2.php
<?php
        ob_start('ob_gzhandler');
        session_start() ;
?>
<html>
<head>
        <title>SID=<?= SID ?></title>
</head>
<body>
        <a href="test1.php">Test2</a>
</body>
</html>
<?php
        ob_flush() ;
        session_write_close() ;
?>


phpinfo() is below:

PHP Logo
PHP Version 4.3.11

System 	FreeBSD www.fxpartners.com 4.11-RC1 FreeBSD 4.11-RC1 #0: Fri Dec 17 i386
Build Date 	Aug 24 2005 20:43:20
Configure Command 	'./configure' '--with-apxs=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/apache1/files/apxs' '--prefix=/usr/local/psa/apache' '--with-regex=php' '--with-config-file-path=/usr/local/psa/apache/conf' '--enable-sockets' '--enable-track-vars' '--with-mysql=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/release/dist/usr/local/psa/mysql' '--with-pgsql=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/release/dist/usr/local/psa/postgresql' '--with-iodbc=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist' '--with-imap=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist' '--with-imap-ssl' '--with-gd' '--with-jpeg-dir=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist' '--with-png-dir=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist' '--without-tiff' '--without-pdflib' '--with-gettext=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist' '--with-openssl=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/release/openssl' '--with-zlib' '--disable-debug' '--enable-pear' '--with-mhash=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist' '--with-curl=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist' '--enable-ftp' '--enable-static' '--enable-mbstring' '--enable-mbregex' '--with-expat-dir=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist' '--with-iconv-dir=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist' '--with-xml' '--with-dom=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist' '--with-iconv=/usr/local' '--with-mcrypt=/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist' '--enable-bcmath'
Server API 	Apache
Virtual Directory Support 	disabled
Configuration File (php.ini) Path 	/usr/local/psa/apache/conf/php.ini
PHP API 	20020918
PHP Extension 	20020429
Zend Extension 	20021010
Debug Build 	no
Thread Safety 	disabled
Registered PHP Streams 	php, http, ftp, https, ftps, compress.zlib

Zend logo This program makes use of the Zend Scripting Language Engine:
Zend Engine v1.3.0, Copyright (c) 1998-2004 Zend Technologies with the ionCube PHP Loader v2.5, Copyright (c) 2002-2004, by ionCube Ltd.

PHP Credits
Configuration
PHP Core
Directive	Local Value	Master Value
allow_call_time_pass_reference	On	On
allow_url_fopen	On	On
always_populate_raw_post_data	Off	Off
arg_separator.input	&	&
arg_separator.output	&	&
asp_tags	Off	Off
auto_append_file	no value	no value
auto_prepend_file	no value	no value
browscap	no value	no value
default_charset	no value	no value
default_mimetype	text/html	text/html
define_syslog_variables	Off	Off
disable_classes	no value	no value
disable_functions	no value	no value
display_errors	On	On
display_startup_errors	Off	Off
doc_root	no value	no value
docref_ext	no value	no value
docref_root	no value	no value
enable_dl	On	On
error_append_string	no value	no value
error_log	no value	no value
error_prepend_string	no value	no value
error_reporting	2039	2039
expose_php	On	On
extension_dir	/usr/local/psa/apache/libexec/php	/usr/local/psa/apache/libexec/php
file_uploads	On	On
gpc_order	GPC	GPC
highlight.bg	#FFFFFF	#FFFFFF
highlight.comment	#FF9900	#FF9900
highlight.default	#0000CC	#0000CC
highlight.html	#000000	#000000
highlight.keyword	#006600	#006600
highlight.string	#CC0000	#CC0000
html_errors	On	On
ignore_repeated_errors	Off	Off
ignore_repeated_source	Off	Off
ignore_user_abort	Off	Off
implicit_flush	Off	Off
include_path	.:/usr/local/psa/apache/lib/php	.:/usr/local/psa/apache/lib/php
log_errors	Off	Off
log_errors_max_len	1024	1024
magic_quotes_gpc	On	On
magic_quotes_runtime	Off	Off
magic_quotes_sybase	Off	Off
max_execution_time	30	30
max_input_time	-1	-1
open_basedir	/usr/local/psa/home/vhosts/fxcourse.com/httpdocs:/tmp	no value
output_buffering	no value	no value
output_handler	no value	no value
post_max_size	8M	8M
precision	14	14
register_argc_argv	On	On
register_globals	On	On
report_memleaks	On	On
safe_mode	Off	Off
safe_mode_exec_dir	/nonexec	/nonexec
safe_mode_gid	Off	Off
safe_mode_include_dir	no value	no value
sendmail_from	me@localhost.com	me@localhost.com
sendmail_path	/usr/sbin/sendmail -t -i 	/usr/sbin/sendmail -t -i
serialize_precision	100	100
short_open_tag	On	On
SMTP	localhost	localhost
smtp_port	25	25
sql.safe_mode	Off	Off
track_errors	Off	Off
unserialize_callback_func	no value	no value
upload_max_filesize	2M	2M
upload_tmp_dir	/tmp	/tmp
user_dir	no value	no value
variables_order	EGPCS	EGPCS
xmlrpc_error_number	0	0
xmlrpc_errors	Off	Off
y2k_compliance	Off	Off

apache
APACHE_INCLUDE 	no value
APACHE_TARGET 	no value
Apache Version 	Apache/1.3.33 (Unix) mod_python/2.7.10 Python/2.2.2 mod_webapp/1.2.0-dev mod_perl/1.29 mod_throttle/3.1.2 PHP/4.3.11 FrontPage/5.0.2.2635 mod_ssl/2.8.22 OpenSSL/0.9.7e
Apache Release 	10333100
Apache API Version 	19990320
Hostname:Port 	fxcourse.com:80
User/Group 	apache(2526)/2524
Max Requests 	Per Child: 100 - Keep Alive: on - Max Per Connection: 1000
Timeouts 	Connection: 300 - Keep-Alive: 15
Server Root 	/usr/local/psa/apache
Loaded Modules 	mod_python, mod_webapp, mod_perl, mod_throttle, mod_php4, mod_frontpage, mod_ssl, mod_setenvif, mod_so, mod_unique_id, mod_usertrack, mod_headers, mod_expires, mod_cern_meta, mod_proxy, mod_digest, mod_auth_dbm, mod_auth_anon, mod_auth, mod_access, mod_rewrite, mod_alias, mod_userdir, mod_speling, mod_actions, mod_imap, mod_asis, mod_cgi, mod_dir, mod_autoindex, mod_include, mod_info, mod_status, mod_negotiation, mod_mime, mod_mime_magic, mod_log_config, mod_define, mod_env, mod_vhost_alias, http_core

Directive	Local Value	Master Value
child_terminate	0	0
engine	1	1
last_modified	0	0
xbithack	0	0

Apache Environment
Variable	Value
DOCUMENT_ROOT 	/usr/local/psa/home/vhosts/fxcourse.com/httpdocs
HTTP_ACCEPT 	text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
HTTP_ACCEPT_CHARSET 	ISO-8859-1,utf-8;q=0.7,*;q=0.7
HTTP_ACCEPT_ENCODING 	gzip,deflate
HTTP_ACCEPT_LANGUAGE 	en-us,en;q=0.5
HTTP_CONNECTION 	keep-alive
HTTP_HOST 	www.fxcourse.com
HTTP_KEEP_ALIVE 	300
HTTP_USER_AGENT 	Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.7) Gecko/20060909 Firefox/1.5.0.7
PATH 	/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
REMOTE_ADDR 	64.180.109.134
REMOTE_PORT 	58721
SCRIPT_FILENAME 	/usr/local/psa/home/vhosts/fxcourse.com/httpdocs/phpinfo.php
SERVER_ADDR 	65.110.17.90
SERVER_ADMIN 	erikg@telus.net
SERVER_NAME 	www.fxcourse.com
SERVER_PORT 	80
SERVER_SIGNATURE 	<ADDRESS>Apache/1.3.33 Server at www.fxcourse.com Port 80</ADDRESS>
SERVER_SOFTWARE 	Apache/1.3.33 (Unix) mod_python/2.7.10 Python/2.2.2 mod_webapp/1.2.0-dev mod_perl/1.29 mod_throttle/3.1.2 PHP/4.3.11 FrontPage/5.0.2.2635 mod_ssl/2.8.22 OpenSSL/0.9.7e
UNIQUE_ID 	RT3o7kFuEVoAAG2uZ1M
GATEWAY_INTERFACE 	CGI/1.1
SERVER_PROTOCOL 	HTTP/1.1
REQUEST_METHOD 	GET
QUERY_STRING 	no value
REQUEST_URI 	/phpinfo.php
SCRIPT_NAME 	/phpinfo.php

HTTP Headers Information
HTTP Request Headers
HTTP Request 	GET /phpinfo.php HTTP/1.1
Accept 	text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Charset 	ISO-8859-1,utf-8;q=0.7,*;q=0.7
Accept-Encoding 	gzip,deflate
Accept-Language 	en-us,en;q=0.5
Connection 	keep-alive
Host 	www.fxcourse.com
Keep-Alive 	300
User-Agent 	Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.7) Gecko/20060909 Firefox/1.5.0.7
HTTP Response Headers
X-Powered-By 	PHP/4.3.11
Keep-Alive 	timeout=15, max=1000
Connection 	Keep-Alive
Transfer-Encoding 	chunked
Content-Type 	text/html

bcmath
BCMath support 	enabled

ctype
ctype functions 	enabled

curl
CURL support 	enabled
CURL Information 	libcurl/7.11.2 OpenSSL/0.9.7e ipv6 zlib/1.1.4

domxml
DOM/XML 	enabled
DOM/XML API Version 	20020815
libxml Version 	20609
HTML Support 	enabled
XPath Support 	enabled
XPointer Support 	enabled

ftp
FTP support 	enabled

gd
GD Support 	enabled
GD Version 	bundled (2.0.28 compatible)
GIF Read Support 	enabled
GIF Create Support 	enabled
JPG Support 	enabled
PNG Support 	enabled
WBMP Support 	enabled
XBM Support 	enabled

gettext
GetText Support 	enabled

iconv
iconv support 	enabled
iconv implementation 	libiconv
iconv library version 	1.9

Directive	Local Value	Master Value
iconv.input_encoding	ISO-8859-1	ISO-8859-1
iconv.internal_encoding	ISO-8859-1	ISO-8859-1
iconv.output_encoding	ISO-8859-1	ISO-8859-1

imap
IMAP c-Client Version 	2004
SSL Support 	enabled

mbstring
Multibyte Support 	enabled
Japanese support 	enabled
Simplified chinese support 	enabled
Traditional chinese support 	enabled
Korean support 	enabled
Russian support 	enabled
Multibyte (japanese) regex support 	enabled

mbstring extension makes use of "streamable kanji code filter and converter", which is distributed under the GNU Lesser General Public License version 2.1.

Directive	Local Value	Master Value
mbstring.detect_order	no value	no value
mbstring.encoding_translation	Off	Off
mbstring.func_overload	0	0
mbstring.http_input	pass	pass
mbstring.http_output	pass	pass
mbstring.internal_encoding	no value	no value
mbstring.language	neutral	neutral
mbstring.substitute_character	no value	no value

mcrypt
mcrypt support	enabled
version 	>= 2.4.x
Supported ciphers 	cast-128 gost rijndael-128 twofish arcfour cast-256 loki97 rijndael-192 saferplus wake blowfish-compat des rijndael-256 serpent xtea blowfish enigma rc2 tripledes
Supported modes 	cbc cfb ctr ecb ncfb nofb ofb stream

Directive	Local Value	Master Value
mcrypt.algorithms_dir	no value	no value
mcrypt.modes_dir	no value	no value

mhash
MHASH support 	Enabled
MHASH API Version 	20020524

mysql
MySQL Support	enabled
Active Persistent Links 	0
Active Links 	0
Client API version 	4.1.11
MYSQL_MODULE_TYPE 	external
MYSQL_SOCKET 	/var/lib/mysql/mysql.sock
MYSQL_INCLUDE 	-I/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/release/dist/usr/local/psa/mysql/include/mysql
MYSQL_LIBS 	-L/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/release/dist/usr/local/psa/mysql/lib/mysql -lmysqlclient

Directive	Local Value	Master Value
mysql.allow_persistent	On	On
mysql.connect_timeout	60	60
mysql.default_host	no value	no value
mysql.default_password	no value	no value
mysql.default_port	no value	no value
mysql.default_socket	no value	no value
mysql.default_user	no value	no value
mysql.max_links	Unlimited	Unlimited
mysql.max_persistent	Unlimited	Unlimited
mysql.trace_mode	Off	Off

odbc
ODBC Support	enabled
Active Persistent Links 	0
Active Links 	0
ODBC library 	iodbc
ODBC_INCLUDE 	-I/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist/include
ODBC_LFLAGS 	-L/usr/home/builder/pb_work_dir/psa_aiconfig_7.5.4/psa/lib/dist/lib
ODBC_LIBS 	-liodbc

Directive	Local Value	Master Value
odbc.allow_persistent	On	On
odbc.check_persistent	On	On
odbc.default_db	no value	no value
odbc.default_pw	no value	no value
odbc.default_user	no value	no value
odbc.defaultbinmode	return as is	return as is
odbc.defaultlrl	return up to 4096 bytes	return up to 4096 bytes
odbc.max_links	Unlimited	Unlimited
odbc.max_persistent	Unlimited	Unlimited

openssl
OpenSSL support 	enabled
OpenSSL Version 	OpenSSL 0.9.7e 25 Oct 2004

overload
User-Space Object Overloading Support 	enabled

pcre
PCRE (Perl Compatible Regular Expressions) Support 	enabled
PCRE Library Version 	4.5 01-December-2003

pgsql
PostgreSQL Support	enabled
PostgreSQL(libpq) Version 	7.4.6
Multibyte character support 	enabled
SSL support 	enabled
Active Persistent Links 	0
Active Links 	0

Directive	Local Value	Master Value
pgsql.allow_persistent	On	On
pgsql.auto_reset_persistent	Off	Off
pgsql.ignore_notice	Off	Off
pgsql.log_notice	Off	Off
pgsql.max_links	Unlimited	Unlimited
pgsql.max_persistent	Unlimited	Unlimited

posix
Revision 	$Revision: 1.51.2.3 $

session
Session Support 	enabled
Registered save handlers 	files user

Directive	Local Value	Master Value
session.auto_start	Off	Off
session.bug_compat_42	On	On
session.bug_compat_warn	On	On
session.cache_expire	180	180
session.cache_limiter	nocache	nocache
session.cookie_domain	no value	no value
session.cookie_lifetime	0	0
session.cookie_path	/	/
session.cookie_secure	Off	Off
session.entropy_file	no value	no value
session.entropy_length	0	0
session.gc_divisor	100	100
session.gc_maxlifetime	1440	1440
session.gc_probability	1	1
session.name	PHPSESSID	PHPSESSID
session.referer_check	no value	no value
session.save_handler	files	files
session.save_path	/tmp	/tmp
session.serialize_handler	php	php
session.use_cookies	On	On
session.use_only_cookies	Off	Off
session.use_trans_sid	On	On

sockets
Sockets Support 	enabled

standard
Regex Library 	Bundled library enabled
Dynamic Library Support 	enabled
Path to sendmail 	/usr/sbin/sendmail -t -i

Directive	Local Value	Master Value
assert.active	1	1
assert.bail	0	0
assert.callback	no value	no value
assert.quiet_eval	0	0
assert.warning	1	1
auto_detect_line_endings	0	0
default_socket_timeout	60	60
safe_mode_allowed_env_vars	PHP_	PHP_
safe_mode_protected_env_vars	LD_LIBRARY_PATH	LD_LIBRARY_PATH
url_rewriter.tags	a=href,area=href,frame=src,input=src,form=fakeentry	a=href,area=href,frame=src,input=src,form=fakeentry
user_agent	no value	no value

tokenizer
Tokenizer Support 	enabled

xml
XML Support 	active
XML Namespace Support 	active
EXPAT Version 	expat_1.95.5

xslt
XSLT support 	enabled
Backend 	Sablotron
Sablotron Version 	1.0.2

zlib
ZLib Support 	enabled
Compiled Version 	1.1.4
Linked Version 	1.1.4

Directive	Local Value	Master Value
zlib.output_compression	Off	Off
zlib.output_compression_level	-1	-1
zlib.output_handler	no value	no value

Additional Modules
Module Name
ionCube Loader

Environment
Variable	Value
USER 	root
LD_LIBRARY_PATH 	/lib:/usr/lib:/usr/local/lib:/usr/local/psa/lib
HOME 	/root
LOGNAME 	root
OPENSSL_CONF 	/usr/local/psa/admin/conf/openssl.cnf
PATH 	/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
PERL5LIB 	/usr/local/psa/lib/perl5/site_perl/5.005
LANG 	C
SHELL 	/bin/sh

PHP Variables
Variable	Value
PHP_SELF 	/phpinfo.php
_SERVER["DOCUMENT_ROOT"]	/usr/local/psa/home/vhosts/fxcourse.com/httpdocs
_SERVER["HTTP_ACCEPT"]	text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
_SERVER["HTTP_ACCEPT_CHARSET"]	ISO-8859-1,utf-8;q=0.7,*;q=0.7
_SERVER["HTTP_ACCEPT_ENCODING"]	gzip,deflate
_SERVER["HTTP_ACCEPT_LANGUAGE"]	en-us,en;q=0.5
_SERVER["HTTP_CONNECTION"]	keep-alive
_SERVER["HTTP_HOST"]	www.fxcourse.com
_SERVER["HTTP_KEEP_ALIVE"]	300
_SERVER["HTTP_USER_AGENT"]	Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.7) Gecko/20060909 Firefox/1.5.0.7
_SERVER["PATH"]	/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
_SERVER["REMOTE_ADDR"]	64.180.109.134
_SERVER["REMOTE_PORT"]	58721
_SERVER["SCRIPT_FILENAME"]	/usr/local/psa/home/vhosts/fxcourse.com/httpdocs/phpinfo.php
_SERVER["SERVER_ADDR"]	65.110.17.90
_SERVER["SERVER_ADMIN"]	erikg@telus.net
_SERVER["SERVER_NAME"]	www.fxcourse.com
_SERVER["SERVER_PORT"]	80
_SERVER["SERVER_SIGNATURE"]	<ADDRESS>Apache/1.3.33 Server at www.fxcourse.com Port 80</ADDRESS>
_SERVER["SERVER_SOFTWARE"]	Apache/1.3.33 (Unix) mod_python/2.7.10 Python/2.2.2 mod_webapp/1.2.0-dev mod_perl/1.29 mod_throttle/3.1.2 PHP/4.3.11 FrontPage/5.0.2.2635 mod_ssl/2.8.22 OpenSSL/0.9.7e
_SERVER["UNIQUE_ID"]	RT3o7kFuEVoAAG2uZ1M
_SERVER["GATEWAY_INTERFACE"]	CGI/1.1
_SERVER["SERVER_PROTOCOL"]	HTTP/1.1
_SERVER["REQUEST_METHOD"]	GET
_SERVER["QUERY_STRING"]	no value
_SERVER["REQUEST_URI"]	/phpinfo.php
_SERVER["SCRIPT_NAME"]	/phpinfo.php
_SERVER["PATH_TRANSLATED"]	/usr/local/psa/home/vhosts/fxcourse.com/httpdocs/phpinfo.php
_SERVER["PHP_SELF"]	/phpinfo.php
_SERVER["argv"]	

Array
(
)

_SERVER["argc"]	0
_ENV["USER"]	root
_ENV["LD_LIBRARY_PATH"]	/lib:/usr/lib:/usr/local/lib:/usr/local/psa/lib
_ENV["HOME"]	/root
_ENV["LOGNAME"]	root
_ENV["OPENSSL_CONF"]	/usr/local/psa/admin/conf/openssl.cnf
_ENV["PATH"]	/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
_ENV["PERL5LIB"]	/usr/local/psa/lib/perl5/site_perl/5.005
_ENV["LANG"]	C
_ENV["SHELL"]	/bin/sh

PHP License

This program is free software; you can redistribute it and/or modify it under the terms of the PHP License as published by the PHP Group and included in the distribution in the file: LICENSE

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

If you did not receive a copy of the PHP license, or have any questions about PHP licensing, please contact license@php.net.