[PHP-NOTES] note 130592 added to function.strtotime

This is useful for relative date calc. Like:

<?php
    echo date('Y-m-d', strtotime('first day of this month'));
?>

2025-12-01
----
Server IP: 206.189.2.9
Probable Submitter: 2600:4041:5627:c00:35db:b4fc:4688:3b4c
----
Manual Page -- https://php.net/manual/en/function.strtotime.php
Edit        -- https://main.php.net/note/edit/130592
Del: integrated  -- https://main.php.net/note/delete/130592/integrated
Del: useless     -- https://main.php.net/note/delete/130592/useless
Del: bad code    -- https://main.php.net/note/delete/130592/bad+code
Del: spam        -- https://main.php.net/note/delete/130592/spam
Del: non-english -- https://main.php.net/note/delete/130592/non-english
Del: in docs     -- https://main.php.net/note/delete/130592/in+docs
Del: other reasons-- https://main.php.net/note/delete/130592
Reject      -- https://main.php.net/note/reject/130592
Search      -- https://main.php.net/manage/user-notes.php