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POPHP's real SESSION object
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  1. POPHP's real SESSION object
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    copied!<p><strong>EDIT:</strong> (UPDATED)</p> <p>Maybe my question was not clear enough. Ok, lets put it this way:</p> <pre><code>$arr["a"] = 10; var_dump($arr); $arr["b"] =&amp; $arr["a"]; var_dump($arr); </code></pre> <p>the first var_dump returns:</p> <pre><code>array 'a' =&gt; int 10 </code></pre> <p>While the second one returns:</p> <pre><code>array 'a' =&gt; &amp;int 10 'b' =&gt; &amp;int 10 </code></pre> <p>If I <em>unset($arr["a"])</em> it will return:</p> <pre><code>array 'b' =&gt; int 10 </code></pre> <p>The rule is, when 2 or more variables "points" to the same content var_dump will display the reference with an ampersand character (&amp;). </p> <p>In the case of $_SESSION, even with <strong>register_long_arrays = Off</strong> $_SESSION still shows a reference. So it is obvious that other variable is also pointing to the same content.</p> <p>In other words, if I unset($_SESSION) there is still other variable somewhere that can be linked to. In the above example, when I <em>unset($arr["a"])</em> I can still recover that content if I create a link, something like: <strong>$arr["z"] =&amp; $arr["b"]</strong>. </p> <p>So, my original question was, does anyone know WHICH is that other variable? It is very probable that such variable do not exists... but I was wondering why inside PHP shows that reference.</p> <p>Thank you</p> <hr> <p>(Original question:)</p> <p>When you create a session in PHP, for example:</p> <pre><code>session_start(); $_SESSION["name"] = "my name"; </code></pre> <p>and dump the GLOBAL variables with:</p> <pre><code>var_dump($GLOBALS); </code></pre> <p>you will see something like:</p> <pre><code> 'HTTP_SESSION_VARS' =&gt; &amp; array 'name' =&gt; string 'my name' (length=7) '_SESSION' =&gt; &amp; array 'name' =&gt; string 'my name' (length=7) 'HTTP_SERVER_VARS' =&gt; array ... </code></pre> <p>As you can see, both variables $GLOBAL[HTTP_SESSION_VARS] and $_SESSION are references to other object's content... Do anyone knows which is that object?</p> <p>In theory, if I unset both variables, somehow It must be possible to access that content... any clue?</p> <p>Thank you!</p>
 

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