How can I calculate the difference between two dates in PHP? Example code:

Listen

$date1 = "2022-03-05";
$date2 = "2022-03-10";

$diff = abs(strtotime($date2) - strtotime($date1));
$days = floor($diff / (60 * 60 * 24));

echo "The difference between the two dates is " . $days . " days";

How can I use the htmlentities function to convert special characters to HTML entities in PHP? Example code:

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How to send SMS using PHP program (full code sample included)