How can you avoid the deprecated warning when passing null values to strtotime in PHP 8.1?

When passing null values to the strtotime function in PHP 8.1, you can avoid the deprecated warning by explicitly checking if the value is null before calling strtotime. This can be done using a conditional statement to ensure that strtotime is only called when a non-null value is provided. 

$date = null;

if ($date !== null) {
    $timestamp = strtotime($date);
    echo date('Y-m-d', $timestamp);
} else {
    echo "Date is null.";
}

Keywords

PHP 8.1 strtotime null values deprecated warning error handling

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