March 8, 2022 There are some best ways to
increase session timeout in PHP, we will discuss the easy way to do it. First, we will see about the session in PHP for better understanding. What is Session In PHP?The session stores temporary information about a user on the server for later use.
Starting a sessionThere is a function in PHP called session_start(). We use it to start a session in our PHP script after starting it we can proceed more in sessions. If the session is already started so it will give a notice error. Creating a Session VariableWe create session variables to store our data in it and we can use them anywhere in the application till the session is destroyed. Assigning value to session variable:
Destroying a sessionWhenever we log out or close the browser so two functions usually run for destroying the session
Difference Between Session unset vs Session destroySession destroy is used for destroying all data of the current session while session unset is used to truncate the data but the session exists. Increase Session Timeout In PHPThe default session timeout in PHP is 24 minutes (1440 seconds). Now here is the easiest way of increasing session timeout.
Put these line in the index.php file of your application or another file that run first in your application. Basically, these lines are increasing PHP server timeout which is defined in php.ini(server configuration file). we managed it simply from our code. ConclusionIn this article, we explained to you how to increase the session timeout in PHP. PHP sessions are the most important part of our application nowadays so it’s good to have knowledge about increasing timeout for controlling big and complex applications. The behaviour of these functions is affected by settings in php.ini. Session configuration options
For further details and definitions of the PHP_INI_* modes, see the Where a configuration setting may be set. The session management system supports a number of configuration options which you can place in your php.ini file. We will give a short overview. session.save_handler string session.save_handler
defines the name of the handler which is used for storing and retrieving data associated with a session. Defaults to files . Note that individual extensions may register their own save_handler s; registered handlers can be obtained on a per-installation basis by referring to phpinfo(). See also
session_set_save_handler(). session.save_path string session.save_path defines the argument which is passed to the save handler. If you choose the default files handler, this is the path where the files are created. See also
session_save_path(). There is an optional The file storage module creates files using
mode 600 by default. This default can be changed with the optional Warning If this is set to a world-readable directory, such as /tmp (the default), other users on the server may be able to hijack sessions by getting the list of files in that directory. Caution When using
the optional directory level argument Only use session.name
string session.name specifies the name of the session which is used as cookie name. It should only contain alphanumeric characters. Defaults to PHPSESSID . See also session_name(). session.auto_start bool session.auto_start specifies whether the session module starts a session automatically on request startup. Defaults to
0 (disabled). session.serialize_handler string session.serialize_handler defines the name of the handler which is used to serialize/deserialize data. PHP serialize format (name php_serialize ), PHP internal formats (name php and php_binary ) and WDDX are supported (name wddx ). WDDX is only available, if PHP is compiled with WDDX support. php_serialize uses plain
serialize/unserialize function internally and does not have limitations that php and php_binary have. Older serialize handlers cannot store numeric index nor string index contains special characters (| and ! ) in $_SESSION. Use php_serialize to avoid numeric index or special character errors at script shutdown. Defaults to php . session.gc_probability int session.gc_probability in conjunction with session.gc_divisor is used to manage
probability that the gc (garbage collection) routine is started. Defaults to 1 . See session.gc_divisor for details. session.gc_divisor int session.gc_divisor coupled with session.gc_probability defines the probability that the gc (garbage collection) process is started on every session initialization. The probability is calculated by using
gc_probability/gc_divisor, e.g. 1/100 means there is a 1% chance that the GC process starts on each request. session.gc_divisor defaults to 100 . session.gc_maxlifetime int session.gc_maxlifetime specifies the number of seconds after which data will be seen as 'garbage' and potentially cleaned up. Garbage collection may occur during session start (depending on
session.gc_probability and session.gc_divisor). Defaults to 1440 (24 minutes).
session.referer_check string session.referer_check contains the substring you want to check each HTTP Referer for. If the Referer was sent by the client and the substring was not found, the embedded session id will be marked
as invalid. Defaults to the empty string. session.entropy_file string session.entropy_file gives a path to an external resource (file) which will be used as an additional entropy source in the session id creation process. Examples are /dev/random or /dev/urandom which are available on many Unix systems. This feature is supported on Windows. Setting session.entropy_length to a non zero value will make PHP use the Windows Random API as entropy source.
session.entropy_length int session.entropy_length specifies the number of bytes which will be read from the file specified above. Defaults to 32 . Removed in PHP 7.1.0. session.use_strict_mode bool
session.use_strict_mode specifies whether the module will use strict session id mode. If this mode is enabled, the module does not accept uninitialized session IDs. If an uninitialized session ID is sent from the browser, a new session ID is sent to the browser. Applications are protected from session fixation via session adoption with strict mode. Defaults to 0 (disabled).
session.use_cookies bool session.use_cookies specifies whether the module will use cookies to store the session id on the client side. Defaults to 1 (enabled). session.use_only_cookies bool
session.use_only_cookies specifies whether the module will only use cookies to store the session id on the client side. Enabling this setting prevents attacks involved passing session ids in URLs. Defaults to 1 (enabled). session.cookie_lifetime int session.cookie_lifetime specifies the lifetime of the cookie in seconds which is sent to the browser. The value 0 means "until the browser is closed." Defaults to 0 . See also
session_get_cookie_params() and session_set_cookie_params().
session.cookie_path string session.cookie_path specifies path to set in the session cookie. Defaults to / . See also session_get_cookie_params() and session_set_cookie_params().
session.cookie_domain string session.cookie_domain specifies the domain to set in the session cookie. Default is none at all meaning the host name of the server which generated the cookie according to cookies specification. See also session_get_cookie_params() and
session_set_cookie_params(). session.cookie_secure bool session.cookie_secure specifies whether cookies should only be sent over secure connections. Defaults to off . See also session_get_cookie_params() and
session_set_cookie_params(). session.cookie_httponly bool Marks the cookie as accessible only through the HTTP protocol. This means that the cookie won't be accessible by scripting languages, such as JavaScript. This setting can effectively help to reduce identity theft through XSS attacks (although it is not supported by
all browsers). session.cookie_samesite string Allows servers to assert that a cookie ought not to be sent along with cross-site requests. This assertion allows user agents to mitigate the risk of cross-origin information leakage, and provides some protection against cross-site request forgery attacks. Note that this is not supported by all browsers. An empty value means that no SameSite cookie attribute will be set. Lax and
Strict mean that the cookie will not be sent cross-domain for POST requests; Lax will sent the cookie for cross-domain GET requests, while Strict will not. session.cache_limiter string session.cache_limiter specifies the cache control method used for session pages. It may be one of the following values: nocache , private , private_no_expire , or public . Defaults to nocache . See also the
session_cache_limiter() documentation for information about what these values mean. session.cache_expire int session.cache_expire specifies time-to-live for cached session pages in minutes, this has no effect for nocache limiter. Defaults to 180 . See also
session_cache_expire(). session.use_trans_sid bool session.use_trans_sid whether transparent sid support is enabled or not. Defaults to 0 (disabled).
session.trans_sid_tags string session.trans_sid_tags specifies which HTML tags are rewritten to include session id when transparent sid support is enabled. Defaults to a=href,area=href,frame=src,input=src,form= form is special tag. <input hidden="session_id" name="session_name"> is added as form variable.
session.trans_sid_hosts string session.trans_sid_hosts specifies which hosts are rewritten to include session id when transparent sid support is enabled. Defaults to $_SERVER['HTTP_HOST'] Multiple
hosts can be specified by ",", no space is allowed between hosts. e.g. php.net,wiki.php.net,bugs.php.net session.sid_length int session.sid_length allows you to specify the length of session ID string. Session ID length can be between 22 to 256. The default is 32. If you need compatibility you may specify 32, 40, etc. Longer session ID is harder to guess. At least 32 chars are recommended. Tip Compatibility Note:
Use 32 instead of
session.sid_bits_per_character int session.sid_bits_per_character allows you to specify the number of bits in encoded session ID character. The possible values are '4' (0-9, a-f), '5' (0-9, a-v), and '6' (0-9, a-z, A-Z, "-", ","). The default is 4. The more bits results in stronger session ID. 5 is recommended value for most environments.
session.hash_function mixed session.hash_function allows you to specify the hash algorithm used to generate the session IDs. '0' means MD5 (128 bits) and '1' means SHA-1 (160 bits). It is also possible to specify any of the algorithms provided by the
hash extension (if it is available), like
session.hash_bits_per_character int
session.hash_bits_per_character allows you to define how many bits are stored in each character when converting the binary hash data to something readable. The possible values are '4' (0-9, a-f), '5' (0-9, a-v), and '6' (0-9, a-z, A-Z, "-", ",").
session.upload_progress.enabled bool Enables upload progress tracking, populating the
$_SESSION variable. Defaults to 1, enabled. session.upload_progress.cleanup bool Cleanup the progress information as soon as all POST data has been read (i.e. upload completed). Defaults to 1, enabled.
session.upload_progress.prefix string A prefix used for the upload progress key in the $_SESSION. This key will be concatenated with the value of $_POST[ini_get("session.upload_progress.name")] to provide a unique index. Defaults to "upload_progress_". session.upload_progress.name string The name of
the key to be used in $_SESSION storing the progress information. See also session.upload_progress.prefix. If $_POST[ini_get("session.upload_progress.name")] is not passed or available, upload progressing will not be recorded. Defaults to "PHP_SESSION_UPLOAD_PROGRESS". session.upload_progress.freq mixed Defines how often the upload progress information should be updated. This can be defined in bytes (i.e. "update progress information after every 100 bytes"), or in percentages (i.e. "update progress information after receiving every 1% of the whole filesize"). Defaults to
"1%". session.upload_progress.min_freq int The minimum delay between updates, in seconds. Defaults to "1" (one second). session.lazy_write bool session.lazy_write , when set to 1, means that session data is only rewritten if it changes. Defaults to 1, enabled. Upload progress will not be registered unless session.upload_progress.enabled is enabled, and the $_POST[ini_get("session.upload_progress.name")] variable is set. See Session Upload Progress for more details on this functionality. Christopher Kramer ¶ 7 years ago
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How can I limit session time in php?The timeout limit of the session can be set by setting the value of two directives in the php. ini file or using the ini_set() function in the PHP script. The directives are given below. It is used to set the time limit in seconds to store the session information in the server for a long time.
How do I expire a php session after 30 minutes?if you want to expire the session after 30 minutes of activity instead of after 30 minutes since start, you'll also need to use setcookie with an expire of time()+60*30 to keep the session cookie active.
How do I keep a php session alive?Using ajax you can call a php script that refreshes your session every 10 minutes. :) This is as far as i can go to "exact". <? php session_start(); // store session data if (isset($_SESSION['id'])) $_SESSION['id'] = $_SESSION['id']; // or if you have any algo. ?>
What is php default session timeout?1440 seconds is the default which is actually 24 minutes.
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