What potential pitfalls should be considered when using strtotime() function to calculate dates in PHP?

One potential pitfall when using the strtotime() function in PHP is that it relies on the server's timezone setting, which can lead to unexpected results if not set correctly. To avoid this issue, it's recommended to explicitly set the timezone before using strtotime() to ensure consistent date calculations. 

// Set the timezone to avoid unexpected results
date_default_timezone_set('America/New_York');

// Calculate a date using strtotime()
$nextWeek = strtotime('+1 week');
echo date('Y-m-d', $nextWeek);

Keywords

strtotime date calculation time zone daylight saving time edge cases

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