Output current week number within month PHP

Question

I have a PHP script to identify the current month and current week within that month.

For today, it should output 501 (i.e. 5th week of the 1st month), however right now it outputs 101.

Can someone explain why this is the case and how I can resolve? I feel I'm missing something obvious.

<?php 
date_default_timezone_set("Europe/London");

function weekOfMonthFunction($date) {
    $firstOfMonth = date("Y-m-01", strtotime($date));
    return intval(date("W", strtotime($date))) - intval(date("W", strtotime($firstOfMonth)));
}

$week = weekOfMonthFunction($date2);
$week = $week + 1;
$month = date("m");
$week_month = $week.$month;

echo $week_month;

question from:https://stackoverflow.com/questions/65886220/output-current-week-number-within-month-php

Answer 1

<?php
date_default_timezone_set("Europe/London");

function weekOfMonth() {
    $now = time();
    $week = date('W', $now);
    $firstWeekOfMonth = date('W', strtotime(date('Y-m-01', $now)));
    return 1 + ($week < $firstWeekOfMonth ? $week : $week - $firstWeekOfMonth);
}

$week = weekOfMonth();
$week_month = $week . date("m");

echo $week_month;

501

Try it online!