How to convert php timestamp to week

How to convert php timestamp to week: First create a PHP sample file; then use the "function weekday($time){...}" method to return the day of the week based on the timestamp.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

php timestamp conversion week

/**
* 根据时间戳返回周几
* @param string $time 时间戳
* @return 周几
*/
function weekday($time)
{
if(is_numeric($time))
{
$weekday = array("周日","周一","周二","周三","周四","周五","周六");
return $weekday[date("w", $time)];
}
return false;
}
var_dump(weekday($_SERVER["REQUEST_TIME"]));
?>

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