shared.make_timestamp.php

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<?php
function smarty_make_timestamp($string)
{
    if (empty($string)) {
        // use "now":
        return time();
    } elseif ($string instanceof DateTime) {
        return $string->getTimestamp();
    } elseif (strlen($string) == 14 && ctype_digit($string)) {
        // it is mysql timestamp format of YYYYMMDDHHMMSS?
        return mktime(substr($string, 8, 2),substr($string, 10, 2),substr($string, 12, 2),
                       substr($string, 4, 2),substr($string, 6, 2),substr($string, 0, 4));
    } elseif (is_numeric($string)) {
        // it is a numeric string, we handle it as timestamp
        return (int) $string;
    } else {
        // strtotime should handle it
        $time = strtotime($string);
        if ($time == -1 || $time === false) {
            // strtotime() was not able to parse $string, use "now":
            return time();
        }
        return $time;
    }
}

?>