What potential issues can arise when using the time() function in PHP to calculate timestamps for user online tracking?

Using the time() function in PHP to calculate timestamps for user online tracking can lead to inaccurate results due to differences in server time settings or time zones. To ensure accurate tracking, it's recommended to use the time zone setting in PHP to standardize the timestamps. 

// Set the default time zone to ensure accurate timestamp calculations
date_default_timezone_set('UTC');

// Calculate the current timestamp using the time() function
$current_timestamp = time();

// Use the timestamp for user online tracking

Keywords

time() timestamps user online tracking potential issues PHP

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