Regarding the problem that php cannot obtain the session value

The solution to the problem that php cannot obtain the session value: first create a folder named "session_temp"; then set its permissions to "writable"; and finally restart apache.

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I wrote a piece of code today and tested the session , but found that the written session value could not be obtained. After checking for a while, I finally found the problem:
My environment is windows7 apache2.22 php5.2.17
Specific session value code

page1.php
<?php
echo "what are you doing now?";
session_start();
$_SESSION[&#39;a&#39;] = &#39;wangzhong&#39;;
$_SESSION[&#39;b&#39;] = &#39;liyu&#39;;
?>
page2.php
<?php
echo "I am testing";
session_start();
echo $_SESSION[&#39;who&#39;].&#39;<br/>&#39;;
echo$_SESSION[&#39;hiswife&#39;],&#39;<br/>;
?>

The pages read by these two test sessions found that page2.php could not obtain the value saved in page1.php. What is the specific reason?
I checked the session configuration in apache, the details are as follows:

session

Session Support	enabled
Registered save handlers	files user
Registered serializer handlers	php php_binary wddx

##DirectiveLocal ValueMaster Valuesession.auto_startOffOff##session.bug_compat_42session.bug_compat_warn##session.cache_expire180180session.cache_limiternocachenocachesession.cookie_domainOffOffsession.cookie_lifetime00session.cookie_path //session.cookie_secureOffOffsession.entropy_fileno value00session.gc_pisor10001000session.gc_maxlifetime1440144015##session.hash_function00no valueno valuefilessession.save_pathD:/php/session_tempD:/php/session_temp session.serialize_handlerphpphp##session.use_cookiessession.use_only_cookiessession .use_trans_sidThen I found that the sessions were all open. I checked the save path of the session and the result was The session_temp directory was not found in the php directory. It may be a problem here. I tried to create a folder with the same name and set it to be writable. Then I restarted apache and tested it again. This time I found that the session value could be read. arrive.

Off	Off
On	On
no value	##no value	##session.cookie_httponly
	no value	session. entropy_length
	##session.gc_probability	1
	session.hash_bits_per_character	5
##session.name	PHPSESSID	PHPSESSID
session.referer_check
	##session.save_handler	files
On	On
Off	Off
0	0
	Really, this simple little problem also needs to be carefully investigated. I find that I have been a little impetuous recently.	There is no problem if there is htmldom before the session_start() method, and it will not affect the reading of the session value. Similarly, if there is an echo output statement before the session_start() method, it will not affect the reading of the session value.

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