How to determine the day of the week based on timestamp in php

青灯夜游
Release: 2023-03-13 06:26:02
Original
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In PHP, you can use the date() function to determine the day of the week based on the timestamp. This function can format the timestamp into a readable date and time string; the syntax format is "date("w ",timestamp);", "w" specifies that the timestamp be formatted as a number representing the day of the week, 0 represents Sunday, 6 represents Saturday.

How to determine the day of the week based on timestamp in php

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

In PHP, you can date( ) function to determine the day of the week based on the timestamp.

date() function formats the local date and time and returns the formatted date string.

Syntax:

date(format,timestamp);
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When format is set to "w", you can specify that the timestamp is formatted as a number representing the day of the week, (0 represents Sunday [Sunday], 6 represents Saturday [Saturday] ]).

<?php
header("Content-type:text/html;charset=utf-8");
$time=strtotime("2021-09-25");
$week = date("w",$time);
echo $week;
?>
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Output:

6
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Let’s optimize the code:

<?php
header("Content-type:text/html;charset=utf-8");
$weekarray = array("日","一", "二", "三", "四", "五", "六");
$time=strtotime("2021-09-26");
$week = $weekarray[date("w",$time)];
echo "周".$week."<br>";

$time=strtotime("2021-09-25");
$week = $weekarray[date("w",$time)];
echo "周".$week;
?>
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Output:

How to determine the day of the week based on timestamp in php

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