How to calculate what day of the year today is in php

Method: 1. Use the "time()" function to obtain the timestamp of the current time; 2. Use the date() function and the z character to format the obtained timestamp into the day of the year, syntax It is "date("z", timestamp)"; 3. Use the echo statement to output the number of days obtained.

The operating environment of this tutorial: windows10 system, PHP7.1 version, DELL G3 computer

How does php calculate the day of the year today

The time() function returns the number of seconds since the Unix epoch (January 1 1970 00:00:00 GMT).

The syntax is:

time();

PHP date() function is used to format time/date.

PHP date() function can format the timestamp into a more readable date and time.

The syntax is:

string date ( string $format [, int $timestamp ] )

The first required parameter format of the date() function specifies how to format the date/time.

z represents the day of the year

The example is as follows:

<?php
$a=time();
$b=date("z",$a);
echo "今天是本年的第".$b."天";
?>

Output result:

Summary:

1. Obtain the timestamp of the current time through the time() function.

2. Then use the date() function and use the z character to calculate the day of the year that the current time is.

3. Use echo to output the obtained results.

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