This document discusses sessions and cookies in PHP. It explains that sessions allow information to be stored and accessed across multiple pages while cookies store data in the user's browser. It provides code examples for setting and retrieving session and cookie data, including using session_start(), session_register(), setcookie(), and output buffering functions like ob_start(). It creates PHP files to demonstrate session and cookie usage.

1. Mr.Warawut Khangkhan
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2. Mr.Warawut Khangkhan Chapter 16 Session & Cookie 2

3. Session
PHP F version 4.0
F F F F
Session F F PHP F
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4. F session
session_start( )
F F F F (initialize) session
: session_start( )
session_register( )
F F F session ( F>1 )
: session_register( [, …])
: F F session_register( ) F F $
F F session F
single quote double quote
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5. New document: PHP
Save: session_register1.php
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6. New document: PHP
Save: session_register2.php
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7. F session
session_unregister( )
F F session
: session_unregister( )
session_destroy( )
F F F session
: session_destroy( )
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8. F F Session
F session_file1.php F F F F F
F username F
F session_file2.php F $username F
session F F $username
(Global Variable) PHP F F
PHP F F F username F
session_file1.php F ( F F
PHP <form> HTML F session)
F session_file3.php F $username
F $username F F F
F
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9. New document: PHP
Save: session_file1.php
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10. New document: PHP
Save: session_file2.php
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11. New document: PHP
Save: session_file3.php
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13. Cookie
F F F F F F
F F F F cookie F F F F
cookie F (expire) F F F PHP
F PHP F cookie F F cookie
F F PHP PHP F F
F F
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14. F F F Session & Cookie
Cookie Session
F F F
F F F F
F F F
session
F F F F F F
F F F F F F F
F
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15. F F Cookie
cookie web server web browser F F F
header HTTP Protocol
F F F setcookie( ) F PHP FF F
browser
F :
F F F output buffering F F F F
F F (buffer) F F F F F F
browser F
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16. New document: PHP
Save: cookie_create.php
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17. New document: PHP
Save: cookie_test.php
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18. F Output Buffering
ob_start( )
F F output buffering F F
F F F
ob_end_flush( )
F FF F F F F output
buffering F F F
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