What potential pitfalls should be considered when using strtotime() in PHP for date calculations?

When using strtotime() in PHP for date calculations, one potential pitfall to consider is that it relies on the server's timezone setting, which may not always be what you expect. To avoid this issue, you can explicitly set the timezone using date_default_timezone_set() before calling strtotime(). This ensures that the date calculations are done in the correct timezone. 

// Set the timezone to UTC before using strtotime()
date_default_timezone_set('UTC');

// Use strtotime() for date calculations
$timestamp = strtotime('next week');
echo date('Y-m-d', $timestamp);

Keywords

strtotime date calculations PHP timezones daylight saving time

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