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[2003-01-15 14:52 UTC] sniper@php.net
[2003-01-15 14:52 UTC] sniper@php.net
[2003-01-16 02:19 UTC] achirizzi at softeam-tsa dot it
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Last updated: Thu Jul 17 14:04:04 2025 UTC |
Take the code that follows and save it in a file called test.php. If you now call the file via a web browser PHP will write a strange string. This is due to the session registering done in the case 0 of the switch. It should print "test_variable=". The strange this happens when you register a variable which has been assigned with an unset other one. And the thing happens only the first time the browser hits the page. At a refresh everything works. <?php function MakeHref($hr) { return($hr); } function NormalFunction($parms, $size, $status) { echo "<HTML>\n"; echo "<BODY>\n"; echo "parms='".$parms."'\n"; echo "</BODY>\n"; echo "</HTML>\n"; } session_start(); switch ($status) { case 0: $f_caller = isset($funcname) ? $funcname:""; //$f_test_variable = isset($test_variable) ? $test_variable:""; $f_test_variable = $test_variable; // comment this and uncomment the line above to make it work // since $test_variable is not set, it seems that memory gets upset session_register("f_test_variable"); session_register("f_caller"); NormalFunction("test_variable=$test_variable", 120, 10); break; } ?> This is my php.ini: [PHP] ; Enable the PHP scripting language engine under Apache. engine = On ; Allow the <? tag. Otherwise, only <?php and <script> tags are recognized. short_open_tag = On ; Allow ASP-style <% %> tags. asp_tags = Off ; The number of significant digits displayed in floating point numbers. precision = 14 ; Enforce year 2000 compliance (will cause problems with non-compliant browsers) y2k_compliance = Off output_buffering = 4096 output_handler = zlib.output_compression = Off implicit_flush = Off allow_call_time_pass_reference = Off safe_mode = Off safe_mode_gid = Off safe_mode_include_dir = safe_mode_exec_dir = safe_mode_allowed_env_vars = PHP_ safe_mode_protected_env_vars = LD_LIBRARY_PATH disable_functions = highlight.string = #CC0000 highlight.comment = #FF9900 highlight.keyword = #006600 highlight.bg = #FFFFFF highlight.default = #0000CC highlight.html = #000000 expose_php = On max_execution_time = 30 ; Maximum execution time of each script, in seconds memory_limit = 8M ; Maximum amount of memory a script may consume (8MB) error_reporting = E_ALL & ~E_NOTICE display_errors = On display_startup_errors = On log_errors = On track_errors = Off variables_order = "GPCS" register_globals = On register_argc_argv = Off post_max_size = 8M gpc_order = "GPC" magic_quotes_gpc = On magic_quotes_runtime = Off magic_quotes_sybase = Off auto_prepend_file = auto_append_file = default_mimetype = "text/html" user_dir = extension_dir = ./extensions enable_dl = On file_uploads = On upload_max_filesize = 2M allow_url_fopen = On extension=php_gd2.dll extension=php_oracle.dll [Syslog] define_syslog_variables = Off [mail function] SMTP = localhost sendmail_from = me@localhost.com [Java] [SQL] sql.safe_mode = Off [ODBC] odbc.allow_persistent = On odbc.check_persistent = On odbc.max_persistent = -1 odbc.max_links = -1 odbc.defaultlrl = 4096 odbc.defaultbinmode = 1 [MySQL] mysql.allow_persistent = On mysql.max_persistent = -1 mysql.max_links = -1 mysql.default_port = mysql.default_socket = mysql.default_host = mysql.default_user = mysql.default_password = [mSQL] msql.allow_persistent = On msql.max_persistent = -1 msql.max_links = -1 [PostgresSQL] pgsql.allow_persistent = On pgsql.auto_reset_persistent = Off pgsql.max_persistent = -1 pgsql.max_links = -1 [Sybase] sybase.allow_persistent = On sybase.max_persistent = -1 sybase.max_links = -1 sybase.min_error_severity = 10 sybase.min_message_severity = 10 sybase.compatability_mode = Off [Sybase-CT] sybct.allow_persistent = On ; Maximum number of persistent links. -1 means no limit. sybct.max_persistent = -1 ; Maximum number of links (persistent + non-persistent). -1 means no limit. sybct.max_links = -1 ; Minimum server message severity to display. sybct.min_server_severity = 10 ; Minimum client message severity to display. sybct.min_client_severity = 10 [bcmath] ; Number of decimal digits for all bcmath functions. bcmath.scale = 0 [browscap] ;browscap = extra/browscap.ini [Informix] ; Default host for ifx_connect() (doesn't apply in safe mode). ifx.default_host = ; Default user for ifx_connect() (doesn't apply in safe mode). ifx.default_user = ; Default password for ifx_connect() (doesn't apply in safe mode). ifx.default_password = ; Allow or prevent persistent links. ifx.allow_persistent = On ; Maximum number of persistent links. -1 means no limit. ifx.max_persistent = -1 ; Maximum number of links (persistent + non-persistent). -1 means no limit. ifx.max_links = -1 ; If on, select statements return the contents of a text blob instead of its id. ifx.textasvarchar = 0 ; If on, select statements return the contents of a byte blob instead of its id. ifx.byteasvarchar = 0 ; Trailing blanks are stripped from fixed-length char columns. May help the ; life of Informix SE users. ifx.charasvarchar = 0 ; If on, the contents of text and byte blobs are dumped to a file instead of ; keeping them in memory. ifx.blobinfile = 0 ; NULL's are returned as empty strings, unless this is set to 1. In that case, ; NULL's are returned as string 'NULL'. ifx.nullformat = 0 [Session] ; Handler used to store/retrieve data. session.save_handler = files ; Argument passed to save_handler. In the case of files, this is the path ; where data files are stored. Note: Windows users have to change this ; variable in order to use PHP's session functions. session.save_path = d:/PHP/sessiondata ; Whether to use cookies. session.use_cookies = 1 ; Name of the session (used as cookie name). session.name = PHPSESSID ; Initialize session on request startup. session.auto_start = 0 ; Lifetime in seconds of cookie or, if 0, until browser is restarted. session.cookie_lifetime = 0 ; The path for which the cookie is valid. session.cookie_path = / ; The domain for which the cookie is valid. session.cookie_domain = ; Handler used to serialize data. php is the standard serializer of PHP. session.serialize_handler = php ; Percentual probability that the 'garbage collection' process is started ; on every session initialization. session.gc_probability = 1 ; After this number of seconds, stored data will be seen as 'garbage' and ; cleaned up by the garbage collection process. session.gc_maxlifetime = 1440 ; Check HTTP Referer to invalidate externally stored URLs containing ids. ; HTTP_REFERER has to contain this substring for the session to be ; considered as valid. session.referer_check = ; How many bytes to read from the file. session.entropy_length = 0 ; Specified here to create the session id. session.entropy_file = ;session.entropy_length = 16 ;session.entropy_file = /dev/urandom ; Set to {nocache,private,public} to determine HTTP caching aspects. session.cache_limiter = nxcache ; Document expires after n minutes. session.cache_expire = 180 session.use_trans_sid = 0 url_rewriter.tags = "a=href,area=href,frame=src,input=src,form=fakeentry" [MSSQL] ; Allow or prevent persistent links. mssql.allow_persistent = On ; Maximum number of persistent links. -1 means no limit. mssql.max_persistent = -1 ; Maximum number of links (persistent+non persistent). -1 means no limit. mssql.max_links = -1 ; Minimum error severity to display. mssql.min_error_severity = 10 ; Minimum message severity to display. mssql.min_message_severity = 10 ; Compatability mode with old versions of PHP 3.0. mssql.compatability_mode = Off ; Valid range 0 - 2147483647. Default = 4096. ;mssql.textlimit = 4096 ; Valid range 0 - 2147483647. Default = 4096. ;mssql.textsize = 4096 ; Limits the number of records in each batch. 0 = all records in one batch. ;mssql.batchsize = 0 [Assertion] [Ingres II] ; Allow or prevent persistent links. ingres.allow_persistent = On ; Maximum number of persistent links. -1 means no limit. ingres.max_persistent = -1 ; Maximum number of links, including persistents. -1 means no limit. ingres.max_links = -1 ; Default database (format: [node_id::]dbname[/srv_class]). ingres.default_database = ; Default user. ingres.default_user = ; Default password. ingres.default_password = [Verisign Payflow Pro] ; Default Payflow Pro server. pfpro.defaulthost = "test-payflow.verisign.com" ; Default port to connect to. pfpro.defaultport = 443 ; Default timeout in seconds. pfpro.defaulttimeout = 30 ; Default proxy IP address (if required). ;pfpro.proxyaddress = ; Default proxy port. ;pfpro.proxyport = ; Default proxy logon. ;pfpro.proxylogon = ; Default proxy password. ;pfpro.proxypassword = [Sockets] ; Use the system read() function instead of the php_read() wrapper. sockets.use_system_read = On [com] ; path to a file containing GUIDs, IIDs or filenames of files with TypeLibs ;com.typelib_file = ; allow Distributed-COM calls com.allow_dcom = true allow_dcom = true