How to Change Timezone in SEEDMS

Understanding date_default_timezone_set()

Before we dive into the practical steps, let's understand the date_default_timezone_set() function. In PHP, this function is used to set the default timezone for all date and time functions in your application.

• date_default_timezone_set(): This function takes a single parameter, a string representing the timezone.
• Asia/Bangkok: This string represents the Bangkok, Thailand timezone.

Why Change the Timezone?

Changing the timezone is necessary when:

• Your application is used by users in different time zones: Ensuring correct time display for each user.
• You need to store time data in a database: Ensuring data is stored in the correct timezone.
• You need to perform calculations involving time: Ensuring accurate calculations.

Steps to Follow

1. Access the /inc/inc.Utils.php file:

   • Use a code editor (e.g., Sublime Text, Visual Studio Code) to open this file.

2. Add the code at the beginning of the file:

   • At the beginning of the file, right after the PHP opening tag (<?php), add the following line:
     PHP

     date_default_timezone_set('Asia/Bangkok');

3. Save the file:

   • After adding the code, save the /inc/inc.Utils.php file.

Example

Suppose your /inc/inc.Utils.php file initially contains:

PHP

<?php
// Other code in the file

After adding the timezone change code, the file will become:

PHP

<?php
date_default_timezone_set('Asia/Bangkok');

// Other code in the file

Checking the Results

To verify if the timezone change was successful, you can add another line of code to display the current time:

PHP

echo date('Y-m-d H:i:s');

After making the changes and saving the file, access any page of your website using SEEDMS. If the displayed time is correct for the Bangkok timezone, then you have successfully changed the timezone.

Important Notes

• Code placement: Placing the date_default_timezone_set() code at the beginning of the file is crucial to ensure it's executed before any other date/time functions.
• Different timezone: If you want to use a different timezone, simply replace 'Asia/Bangkok' with the corresponding timezone string. For example: 'America/New_York'.
• Timezone list: For a complete list of supported timezones, refer to the official PHP documentation.

Conclusion

Changing the timezone in SEEDMS by adding the date_default_timezone_set() code is a simple yet effective task. By doing this, you can ensure that all time-related operations in your application are performed accurately.

Note: For the most accurate results, make sure the timezone on your server is configured correctly.