session.configuration.html

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  <dt id="ini.session.referer-check">
   <span class="term">
    <i><tt class="parameter">session.referer_check</tt></i>

    <a href="language.types.string.html" class="type string">string</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.referer_check</i> 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.
    </span>
   </dd>

  </dt>


  <dt id="ini.session.entropy-file">
   <span class="term">
    <i><tt class="parameter">session.entropy_file</tt></i>

    <a href="language.types.string.html" class="type string">string</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.entropy_file</i> 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
     <i>/dev/random</i> or <i>/dev/urandom</i>
     which are available on many Unix systems.
    </span>
   </dd>

  </dt>


  <dt id="ini.session.entropy-length">
   <span class="term">
    <i><tt class="parameter">session.entropy_length</tt></i>

    <a href="language.types.integer.html" class="type integer">integer</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.entropy_length</i> specifies the number
     of bytes which will be read from the file specified
     above. Defaults to <i>0</i> (disabled).
    </span>
   </dd>

  </dt>


  <dt id="ini.session.use-cookies">
   <span class="term">
    <i><tt class="parameter">session.use_cookies</tt></i>

    <a href="language.types.boolean.html" class="type boolean">boolean</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.use_cookies</i> specifies whether the
     module will use cookies to store the session id on the client
     side. Defaults to <i>1</i> (enabled).
    </span>
   </dd>

  </dt>


  <dt id="ini.session.use-only-cookies">
   <span class="term">
    <i><tt class="parameter">session.use_only_cookies</tt></i>

    <a href="language.types.boolean.html" class="type boolean">boolean</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.use_only_cookies</i> specifies whether
     the module will <em class="emphasis">only</em> use
     cookies to store the session id on the client side.
     Enabling this setting prevents attacks involved passing session
     ids in URLs. This setting was added in PHP 4.3.0.
     Defaults to <i>1</i> (enabled) since PHP 6.0.
    </span>
   </dd>

  </dt>



  <dt id="ini.session.cookie-lifetime">
   <span class="term">
    <i><tt class="parameter">session.cookie_lifetime</tt></i>

    <a href="language.types.integer.html" class="type integer">integer</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.cookie_lifetime</i> specifies the lifetime of
     the cookie in seconds which is sent to the browser. The value 0
     means &quot;until the browser is closed.&quot; Defaults to
     <i>0</i>. See also
     <a href="function.session-get-cookie-params.html" class="function">session_get_cookie_params()</a> and
     <a href="function.session-set-cookie-params.html" class="function">session_set_cookie_params()</a>.
    </span>
    <blockquote><p><b class="note">Note</b>: 
     
      The expiration timestamp is set relative to the server time, which is
      not necessarily the same as the time in the client&#039;s browser.
     <br />
    </p></blockquote> 
   </dd>

  </dt>


  <dt id="ini.session.cookie-path">
   <span class="term">
    <i><tt class="parameter">session.cookie_path</tt></i>

    <a href="language.types.string.html" class="type string">string</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.cookie_path</i> specifies path to set
     in session_cookie. Defaults to <i>/</i>. See also
     <a href="function.session-get-cookie-params.html" class="function">session_get_cookie_params()</a> and
     <a href="function.session-set-cookie-params.html" class="function">session_set_cookie_params()</a>.
    </span>
   </dd>

  </dt>


  <dt id="ini.session.cookie-domain">
   <span class="term">
    <i><tt class="parameter">session.cookie_domain</tt></i>

    <a href="language.types.string.html" class="type string">string</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.cookie_domain</i> specifies the domain to
     set in session_cookie. Default is none at all meaning the host name of
     the server which generated the cookie according to cookies specification.
     See also <a href="function.session-get-cookie-params.html" class="function">session_get_cookie_params()</a> and
     <a href="function.session-set-cookie-params.html" class="function">session_set_cookie_params()</a>.
    </span>
   </dd>

  </dt>


  <dt id="ini.session.cookie-secure">
   <span class="term">
    <i><tt class="parameter">session.cookie_secure</tt></i>

    <a href="language.types.boolean.html" class="type boolean">boolean</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.cookie_secure</i> specifies whether
     cookies should only be sent over secure connections. Defaults to
     <i>off</i>.
     This setting was added in PHP 4.0.4. See also
     <a href="function.session-get-cookie-params.html" class="function">session_get_cookie_params()</a> and
     <a href="function.session-set-cookie-params.html" class="function">session_set_cookie_params()</a>.
    </span>
   </dd>

  </dt>


  <dt id="ini.session.cookie-httponly">
   <span class="term">
    <i><tt class="parameter">session.cookie_httponly</tt></i>

    <a href="language.types.boolean.html" class="type boolean">boolean</a>
   </span>

   <dd>

    <span class="simpara">
     Marks the cookie as accessible only through the HTTP protocol. This means
     that the cookie won&#039;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).
    </span>
   </dd>

  </dt>


  <dt id="ini.session.cache-limiter">
   <span class="term">
    <i><tt class="parameter">session.cache_limiter</tt></i>

    <a href="language.types.string.html" class="type string">string</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.cache_limiter</i> specifies cache
     control method to use for session pages
     (none/nocache/private/private_no_expire/public). Defaults to
     <i>nocache</i>. See also
     <a href="function.session-cache-limiter.html" class="function">session_cache_limiter()</a>.
    </span>
   </dd>

  </dt>



  <dt id="ini.session.cache-expire">
   <span class="term">
    <i><tt class="parameter">session.cache_expire</tt></i>

    <a href="language.types.integer.html" class="type integer">integer</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.cache_expire</i> specifies time-to-live
     for cached session pages in minutes, this has no effect for
     nocache limiter. Defaults to <i>180</i>. See also
     <a href="function.session-cache-expire.html" class="function">session_cache_expire()</a>.
    </span>
   </dd>

  </dt>


  <dt id="ini.session.use-trans-sid">
   <span class="term">
    <i><tt class="parameter">session.use_trans_sid</tt></i>

    <a href="language.types.boolean.html" class="type boolean">boolean</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.use_trans_sid</i> whether transparent
     sid support is enabled or not. Defaults to
     <i>0</i> (disabled).
    </span>
    <blockquote><p><b class="note">Note</b>: 
     <span class="simpara">
      For PHP 4.1.2 or less, it is enabled by compiling with 
      <a href="configure.html#configure.enable-trans-sid" class="link">
      <i>--enable-trans-sid</i></a>.
      From PHP 4.2.0, trans-sid feature is always compiled.
     </span>
     <span class="simpara">
      URL based session management has additional security risks
      compared to cookie based session management. Users may send
      a URL that contains an active session ID to their friends by
      email or users may save a URL that contains a session ID to
      their bookmarks and access your site with the same session ID
      always, for example.
     </span>
    </p></blockquote>
   </dd>

  </dt>

  
  <dt id="ini.session.bug-compat-42">
   <span class="term">
    <i><tt class="parameter">session.bug_compat_42</tt></i>

    <a href="language.types.boolean.html" class="type boolean">boolean</a>
   </span>

   <dd>

    <span class="simpara">
     PHP versions 4.2.3 and lower have an undocumented feature/bug that
     allows you to initialize a session variable in the global scope,
     albeit <a href="ini.core.html#ini.register-globals" class="link">register_globals</a>
     is disabled.  PHP 4.3.0 and later will warn you, if this feature is
     used, and if <a href="session.configuration.html#ini.session.bug-compat-warn" class="link">
     session.bug_compat_warn</a> is also enabled.  This feature/bug can be
     disabled by disabling this directive.
    </span>
   </dd>

  </dt>

  
  <dt id="ini.session.bug-compat-warn">
   <span class="term">
    <i><tt class="parameter">session.bug_compat_warn</tt></i>

    <a href="language.types.boolean.html" class="type boolean">boolean</a>
   </span>

   <dd>

    <span class="simpara">
     PHP versions 4.2.3 and lower have an undocumented feature/bug that
     allows you to initialize a session variable in the global scope,
     albeit <a href="ini.core.html#ini.register-globals" class="link">register_globals</a>
     is disabled.  PHP 4.3.0 and later will warn you, if this feature is
     used by enabling both 
     <a href="session.configuration.html#ini.session.bug-compat-42" class="link">session.bug_compat_42</a>
     and <a href="session.configuration.html#ini.session.bug-compat-warn" class="link">
     session.bug_compat_warn</a>.
    </span>
   </dd>

  </dt>


  <dt id="ini.session.hash-function">
   <span class="term">
    <i><tt class="parameter">session.hash_function</tt></i>

    <a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.hash_function</i> allows you to specify the hash
     algorithm used to generate the session IDs. &#039;0&#039; means MD5 (128 bits) and
     &#039;1&#039; means SHA-1 (160 bits).
    </span>
    <p class="para">
     Since PHP 6.0.0 it is also possible to specify any of the algorithms
     provided by the <a href="ref.hash.html" class="link">hash extension</a> (if it is
     available), like <i>sha512</i> or
     <i>whirlpool</i>. A complete list of supported algorithms can
     be obtained with the <a href="function.hash-algos.html" class="function">hash_algos()</a> function.
    </p>
    <blockquote><p><b class="note">Note</b>: 
     
      This was introduced in PHP 5.
     <br />
    </p></blockquote>
   </dd>

  </dt>


  <dt id="ini.session.hash-bits-per-character">
   <span class="term">
    <i><tt class="parameter">session.hash_bits_per_character</tt></i>

    <a href="language.types.integer.html" class="type integer">integer</a>
   </span>

   <dd>

    <span class="simpara">
     <i>session.hash_bits_per_character</i> 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 &#039;4&#039; (0-9, a-f),
     &#039;5&#039; (0-9, a-v), and &#039;6&#039; (0-9, a-z, A-Z, &quot;-&quot;, &quot;,&quot;).
    </span>
    <blockquote><p><b class="note">Note</b>: 
     
      This was introduced in PHP 5.
     <br />
    </p></blockquote>
   </dd>

  </dt>


  <dt id="ini.url-rewriter.tags">
   <span class="term">
    <i><tt class="parameter">url_rewriter.tags</tt></i>

    <a href="language.types.string.html" class="type string">string</a>
   </span>

   <dd>

    <span class="simpara">
     <i>url_rewriter.tags</i> specifies which HTML tags
     are rewritten to include session id if transparent sid support
     is enabled. Defaults to
     <i>a=href,area=href,frame=src,input=src,form=fakeentry,fieldset=</i>
    </span>
    <blockquote><p><b class="note">Note</b>: 
     <span class="simpara">
      If you want HTML/XHTML strict conformity, remove the <i>form</i> entry and
      use the &lt;fieldset&gt; tags around your form fields.
     </span>
    </p></blockquote>
   </dd>

  </dt>

 </dl>

 </p>

 <p class="para">
  The <a href="ini.core.html#ini.track-vars" class="link"><i>track_vars</i></a> and
  <a href="ini.core.html#ini.register-globals" class="link"><i>register_globals</i></a>
  configuration settings influence how the session variables get
  stored and restored.
 </p>

 <blockquote><p><b class="note">Note</b>: 
  
   As of PHP 4.0.3, <a href="ini.core.html#ini.track-vars" class="link"><i>track_vars</i></a> is
   always turned on.
  <br />
 </p></blockquote>

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