The PHP maximum execution time is typically set in the server configuration file `php.ini`. However, if you don't have access to modify the `php.ini` file, you can try setting it in the `.htaccess` file using the `php_value` directive.
Here's an example of how to set the PHP maximum execution time in an `.htaccess` file:
1. Open your `.htaccess` file for editing. If you don't have one, you can create a new file and name it `.htaccess`.
2. Add the following line to set the maximum execution time:
```apache
php_value max_execution_time 120
```
This sets the maximum execution time to 120 seconds (2 minutes). You can adjust the value according to your needs.
3. Save the `.htaccess` file.
Please note that modifying PHP settings through `.htaccess` might not work on all server configurations. Additionally, some hosting providers may restrict the usage of certain directives in `.htaccess` files for security reasons. If the above method doesn't work for you, you may need to contact your hosting provider or system administrator to adjust the PHP maximum execution time in the server configuration.