What potential pitfalls should be considered when calculating the beginning and end of a week using Unix timestamps in PHP?

When calculating the beginning and end of a week using Unix timestamps in PHP, one potential pitfall to consider is the timezone difference. Unix timestamps are based on UTC time, so if your server or application is set to a different timezone, it can affect the accuracy of the calculations. To solve this issue, you can set the timezone to UTC before performing any calculations on Unix timestamps. 

// Set the timezone to UTC
date_default_timezone_set('UTC');

// Calculate the beginning of the current week
$beginningOfWeek = strtotime('last monday', strtotime('midnight'));

// Calculate the end of the current week
$endOfWeek = strtotime('next sunday 23:59:59', $beginningOfWeek);

echo "Beginning of the week: " . date('Y-m-d H:i:s', $beginningOfWeek) . "\n";
echo "End of the week: " . date('Y-m-d H:i:s', $endOfWeek);

Keywords

Unix timestamps PHP date functions week calculation timezone conversion DST adjustments

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