PHP cookies and sessions: Exercises, Practice, Solutions

PHP Cookies and Sessions: Exercises Practice Solution [ 16 exercises with solution ]

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The following exercises cover various aspects of working with cookies and sessions in PHP. These include setting and retrieving values, session management, session security, and common usage scenarios.

1. Write a PHP script to set a cookie named "username" with the value "Gulnara Serik" and an expiration time of one hour.
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2. Write a PHP script to retrieve and display the value of the cookie named "username".
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3. Write a PHP script to delete a cookie named "username".
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4. Write a PHP script to set a session variable named "userid" with the value 10020.
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5. Write a PHP script to retrieve and display the value of the session variable "userid".
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6. Write a PHP script to destroy a session and unset all session variables.
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7. Write a PHP script to set a secure cookie that can only be transmitted over an encrypted connection.
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8. Write a PHP script to check if a cookie named "visited" exists. If it does, display a welcome message; otherwise, display a default message.
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9. Write a PHP script to store an array of user preferences in a session variable.
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10. Write a PHP script to retrieve and display user preferences stored in the session variable.
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11. Write a PHP script to set a session timeout after 30 minutes of inactivity.
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12. Write a PHP script to display the number of active sessions on the server.
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13. Write a PHP script to limit the maximum number of concurrent sessions for a user to 3.
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14. Write a PHP script to regenerate the session ID to prevent session fixation attacks.
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15. Write a PHP script to display the last time the session was accessed by the user.
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16. Write a PHP script to set a cookie and a session variable with the same name. Display their values to compare.
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