How to get the current week of the year in php

In PHP, you can use the date() function with the "W" character to get the week of the year for the current date. The syntax "date('W')" will return a number representing the year. The number of the week.

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

In PHP, you can use date () function to get the week number of the year for the current date.

date() function can format a local time or date. The syntax of this function is as follows:

date($format [,$timestamp])

The parameter description is as follows:

• $format: Indicates the formatted time format, which can contain some characters with special meanings.

• $timestamp: Indicates the timestamp to be formatted. It is an optional parameter and defaults to the current time (when $timestamp is omitted). It can also be understood that the default value of $timestamp is time().

When the $formatc parameter value of the date() function is set to "W", and the $timestamp parameter is omitted or is time(), the year of the current date can be obtained of weeks.

• W: Will use numbers to represent the week of the year according to the ISO-8601 standard format, and each week starts on Monday, (PHP New in 4.1.0). For example: 42 (the 42nd week of the year).

Example:

<?php
header("Content-Type: text/html;charset=utf-8");  //可不要，在这里只是为了让确定字符格式，防止乱码。
$week = date(&#39;W&#39;);
echo &#39;今天是一年中的第&#39;.$week.&#39;周&#39;;
?>

Let’s see if it is:

I counted on the calendar and it was indeed the 8th week.

Extended knowledge: Parameter $format Special characters that can be recognized in the format string

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