How to convert php timestamp to day of the week

How to convert timestamp to week in php: First create a PHP sample file; then define a weekday method; finally, use functions such as "is_numeric" and "date" to convert timestamp into weekday.

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer.

PHP returns the day of the week based on the timestamp

<?php
/**
 * 根据时间戳返回星期几
 * @param string $time 时间戳
 * @return 星期几
 */
function weekday($time)
{
if(is_numeric($time))
{
$weekday = array(&#39;星期日&#39;,&#39;星期一&#39;,&#39;星期二&#39;,&#39;星期三&#39;,&#39;星期四&#39;,&#39;星期五&#39;,&#39;星期六&#39;);
return $weekday[date(&#39;w&#39;, $time)];
}
return false;
}
var_dump(weekday($_SERVER[&#39;REQUEST_TIME&#39;]));
?>

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