References - Chatbot - Chatbot sessions

The chatbot uses a txt file to store sessions. Each time the chatbot is used, a new text file with the IP and the date will be created. This file will store all the session of the user. Text session improve the chatbot performance because they allow the user to keep track of the session for longer time. If the user decide to delete his browser cache the text session won't be cleared. This means the captcha will be written 1 time. This also means it will remember the last word written. When owning a copy of the chatbot make sure to delete the session folder text file from time to time to avoid using too much space. Also make sure to give the correct permissions to the session directory. It will need the writing file permissions to allow the file creation. To save a session add this line of code:

write_session('session_name', 'session_value');

Replace the session_ string with the correct name and value. To retrieve the session later on, use this line of code:

use_session('session_name');

This method will return the session value if it exist or null if it doesn't find it. This means to use it with an IF condition

if(!use_session('session_name')){
	echo 'found the session !';
}

Working with session array is a little longer. The session value will have to be retrieve first, then add an array index and save the session

$old_values = use_session('session_name');
$accepted = array('other', 'nom', 'ver', 'adj');
foreach($accepted as $key => $value) {
	$old_values[$value] = array();
}
write_session('session_name', $old_values);

Source : learningbot

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