PHP method to determine session failure

php method to determine session failure: 1. Open the "php.ini" configuration file and find "upload_tmp_dir"; 2. Create a tp directory; 3. Restart apache; 4. Log in again.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

php method to determine session invalidation

php method to verify session invalidation

1. Problem

Today I struggled for a long time when configuring the apache php environment. Later, I succeeded but found that the verification code image could be generated. During the login verification, I found that the session was empty and had no value.

2. Solution

Environment: apache php

The program code is as follows:

The code is as follows:

<input name="username" type="text" class="input" id="username">
<input name="password" type="password" class="input" id="password">
<input name="ver" type="text" class="input1" id="ver" size="5">
<img  src="/static/imghwm/default1.png"  data-src="../inc/ver.php"  class="lazy"   onclick="this.src=&#39;../inc/ver.php&#39;;" / alt="PHP method to determine session failure" >

Process the file after submission The code of this post.php file

is as follows:

if($_SESSION['ssioner']!=$ssever){
echo("<script>alert(&#39;验证码必须由4位数字组成!&#39;);history.back();</script>");exit; 
}

It turns out that it keeps prompting that the verification code must consist of 4 digits, and then prints out the session:

The code is as follows:

echo $_SESSION['ssioner'];
exit;

has always been empty, so I thought of a session file directory in the php environment configuration. Now we find the php.ini configuration file and find

upload_tmp_dir

and find that this directory is

upload_tmp_dir="D:\www.phpstudy.net\tp"

I checked my D drive and found that there was only the www.phpstudy.net file but no tp directory. The problem was found. Then I created a tp directory, restarted apache and found that there was the sess_i40gl0p4hfep5r69j67o1k26d01 file in the tp directory. Then I tried again. The login was found to be successful.

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