PHP Validation Session Invalid problem solving method

Source: Internet
Author: User
Tags exit php file

Environment, I'm using the apache+php environment.

If my 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" >

Processing files After submitting this post.php file

if ($_session[' Ssioner ']!= $ssever) {
Echo (' <script>alert (' captcha must consist of 4 digits! '); History.back ();</script> "); exit;

It turns out that the verification code must be 4 digits, and I'll print out the session

echo $_session[' Ssioner '];exit;

has been empty, when I thought of the PHP environment configuration of a session file directory, now we find the php.ini configuration file to find


Found this directory is

Upload_tmp_dir= "D:www.111cn.nettp"

I check my d disk found only file and no TP directory, so the problem is found, when I create a TP directory, restart Apache found in the TP directory has sess_i40gl0p4hfep5r69j67o1k26d01 files, The login was successful again.

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