What are common pitfalls when mixing DateTime objects with strtotime in PHP?

When mixing DateTime objects with strtotime in PHP, a common pitfall is that strtotime expects a string input, not a DateTime object. To avoid this issue, you can convert the DateTime object to a string using the format method before passing it to strtotime. 

$datetime = new DateTime('2022-01-01');
$dateString = $datetime->format('Y-m-d');
$newTimestamp = strtotime($dateString);
echo $newTimestamp;

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DateTime strtotime PHP pitfalls mixing

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