Where Is Session Data Stored
This section provides a tutorial example on how to find out where the PHP engine stores session data. The session.save_path setting specifies the directory name for session data.
Where does PHP store session data? The answer is not so obvious.
Since I am running the PHP engine in CGI mode, PHP script pages are running with individual instances of
the PHP executable program. So there is no easy to store session data in memory and share it between
different PHP script pages. If not stored in memory, session data can be stored on hard disk
and share it between PHP pages. Let's see if we can find where session data is stored
on the hard disk.
First run http://localhost/SessionPage1.php again:
I am buying 3 PHP books.
Counter = 1
Session name = PHPSESSID
Session id = mg04r204ctuloo2uegmih14ri5
Session module = files
Contents of $_GET:
Contents of $_POST:
Contents of $_COOKIE:
Then use the Windows find tool to search for file names with "mg04r204ctuloo2uegmih14ri5".
No surprise, you should get \tmp\sess_mg04r204ctuloo2uegmih14ri5. Open this file
in a text editor, you should see:
The file format is so simple, session data is stored in clear text, with ";" as delimiters.
If you want to change where session data is stored, you can modify the session.save_path setting in \php\php.ini.
session.save_path = "\herong\temp"
Table of Contents
About This Book
Introduction and Installation of PHP 7.3
PHP Script File Syntax
PHP Data Types and Data Literals
Variables, References, and Constants
Expressions, Operations and Type Conversions
Conditional Statements - "if" and "switch"
Loop Statements - "while", "for", and "do ... while"
Function Declaration, Arguments, and Return Values
Arrays - Ordered Maps
Interface with Operating System
Introduction of Class and Object
Integrating PHP with Apache Web Server
Retrieving Information from HTTP Requests
►Creating and Managing Sessions in PHP Scripts
What Is a Session
How Sessions Are Supported in PHP
SessionPage*.php - Session Test Script Pages
Running Session Test Script Pages
Managing Session IDs without Cookies
►Where Is Session Data Stored
Sending and Receiving Cookies in PHP Scripts
Controlling HTTP Response Header Lines in PHP Scripts
Managing File Upload
MySQL Server Connection and Access Functions
Functions to Manage Directories, Files and Images
SOAP Extension Function and Calling Web Services
SOAP Server Functions and Examples
Localization Overview of Web Applications
Using Non-ASCII Characters in HTML Documents
Using Non-ASCII Characters as PHP Script String Literals
Receiving Non-ASCII Characters from Input Forms
"mbstring" Extension and Non-ASCII Encoding Management
Managing Non-ASCII Character Strings with MySQL Servers
Parsing and Managing HTML Documents
Configuring and Sending out Emails
Image and Picture Processing
Managing ZIP Archive Files
Managing PHP Engine and Modules on macOS
Managing PHP Engine and Modules on CentOS
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