Posted by Duncan on 02/19/06 09:11

Putting ini_set('session.use_cookies',false); to image script solved the
problem. Thanks to arborint from DevNetwork.com for solving the problem.

I wonder why I should put it to image script. Isn't putting it to only the
main script enough? It is strange that the old code worked perfectly fine
without that line in PHP 4, but didn't work in PHP 5.


"Duncan" <aaa@ne.com> wrote in message
news:FaGdnT8DSNL-mmXenZ2dnUVZ_tSdnZ2d@giganews.com...
>I have a strange problem with sessions in PHP 5. I have a simple script
>that prints a random number both as a string and a picture on the screen.
>When I run the script for the first time, it works perfectly. However, when
>I refresh the page, new updated random number does not propagate to the
>image displayer script through sessions. The image displayer script
>continues showing the old number instead of the new random number. I
>checked the script on PHP 4.4.2 on Linux with Apache, and the script worked
>without any problems. However, when I tried it on my computer using PHP
>5.1.2 on Windows with Apache 2, I got this problem. I used the same
>computer with IE6 for browsing in both cases.
>
> I did some debugging and saw that the problem is solved when I delete the
> ini_set('session.use_cookies',false); line. However, I need this line
> because I do not want to use cookies.
>
>
> These are the scripts:
>
> The main script printing the numbers. When you run the script, the two
> numbers written as text and image must be the same. When you first run the
> script, they are the same. However, when you refresh the page, image still
> shows the old number when PHP 5 is used.
>
> Code:
>
>
> <?php
>
> ini_set('session.use_cookies',false);
> session_start();
>
> $IMGVER_TS = (rand()%10);
>
> $_SESSION["IMGVER_RT"] = $IMGVER_TS;
>
> ?>
>
> <p align="center"> <?php echo $IMGVER_TS ?> <img src="deneimg.php?<?php
> echo SID ?>"> </p>
>
>
>
>
>
>
>
>
> This is the script for showing the image. The name of the script file is
> deneimg.php
>
> Code:
>
>
> <?php
>
> session_start();
>
>
> $IMGVER_IMAGE = imagecreate(50,20);
> $IMGVER_COLOR_BLACK = imagecolorallocate ($IMGVER_IMAGE, 110,110, 110);
> $IMGVER_COLOR_WHITE = imagecolorallocate ($IMGVER_IMAGE, 205, 205, 205);
> imagefill($IMGVER_IMAGE, 0, 0, $IMGVER_COLOR_BLACK);
>
> $IMGVER_RanText = $_SESSION["IMGVER_RT"];
>
> imagechar($IMGVER_IMAGE, 3, 20, 0, $IMGVER_RanText ,$IMGVER_COLOR_WHITE);
>
>
> header("Content-type: image/jpeg");
> imagejpeg($IMGVER_IMAGE);
> ?>
>
>
>
> Could you please check it?
>
>
>
> I checked the temp directory for sessions. Session files are created
> properly, so it is not the source of the problem.
>
> Also, I think it is not a cache problem. I did refresh by pressing ctrl +
> f5 and it didn't solve the problem. Strange thing is that the same code is
> working on when server is PHP 4.4.2 on Linux with Apache, but not working
> when server is PHP 5.1.2 on Windows XP with Apache 2.0.55 connected to PHP
> via ISAPI.
>
> Session id's are being passed around the URL. Sessions are working when I
> first load the page. When I do refresh, a new session id is injected to
> the image displayer script, but the image displayer script is still
> showing the data of previous session.
>
> I tried the code by setting session.use_trans_sid to both on and off, but
> it didn't solve the problem. The code is working perfectly fine on a
> server is PHP 4.4.2 that has session.use_trans_sid set to off.
>
> The session parameters of my server causing the problem are as follows:
>
> session.auto_start Off Off
> session.bug_compat_42 Off Off
> 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 1000 1000
> session.gc_maxlifetime 1440 1440
> session.gc_probability 1 1
> session.hash_bits_per_character 5 5
> session.hash_function 0 0
> session.name PHPSESSID PHPSESSID
> session.referer_check no value no value
> session.save_handler files files
> session.save_path c:\Temp c:\Temp
> session.serialize_handler php php
> session.use_cookies On On
> session.use_only_cookies Off Off
> session.use_trans_sid 0 0
>
>
>
> PHP core parameters are as follows:
>
> allow_call_time_pass_reference Off Off
> 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_globals_jit On On
> 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 On On
> 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 c:\php\error.txt c:\php\error.txt
> error_prepend_string no value no value
> error_reporting 2039 2039
> expose_php On On
> extension_dir c:\php\ c:\php\
> file_uploads On On
> highlight.bg #FFFFFF #FFFFFF
> highlight.comment #FF8000 #FF8000
> highlight.default #0000BB #0000BB
> highlight.html #000000 #000000
> highlight.keyword #007700 #007700
> highlight.string #DD0000 #DD0000
> 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 .;C:\php5\pear .;C:\php5\pear
> log_errors On On
> log_errors_max_len 1024 1024
> magic_quotes_gpc On On
> magic_quotes_runtime Off Off
> magic_quotes_sybase Off Off
> mail.force_extra_parameters no value no value
> max_execution_time 30 30
> max_input_time 60 60
> open_basedir no value no value
> output_buffering 4096 4096
> output_handler no value no value
> post_max_size 8M 8M
> precision 14 14
> realpath_cache_size 16K 16K
> realpath_cache_ttl 120 120
> register_argc_argv Off Off
> register_globals Off Off
> register_long_arrays Off Off
> report_memleaks On On
> report_zend_debug On On
> safe_mode On On
> safe_mode_exec_dir no value no value
> safe_mode_gid Off Off
> safe_mode_include_dir no value no value
> sendmail_from no value no value
> sendmail_path no value no value
> serialize_precision 100 100
> short_open_tag Off Off
> 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 no value no value
> user_dir no value no value
> variables_order GPCS GPCS
> xmlrpc_error_number 0 0
> xmlrpc_errors Off Off
> y2k_compliance On On
> zend.ze1_compatibility_mode Off Off
>

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