What are the potential pitfalls of using the 'r' format specifier for date conversion in PHP?

Using the 'r' format specifier for date conversion in PHP can lead to incorrect results as it represents the RFC 2822 formatted date which may not match the input date format. To avoid this issue, it's recommended to use the 'Y-m-d H:i:s' format specifier for date conversion in PHP. 

$date = "2022-01-15 14:30:00";
$timestamp = strtotime($date);
$formatted_date = date('Y-m-d H:i:s', $timestamp);

echo $formatted_date;

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PHP date conversion 'r' format specifier potential pitfalls

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