PHP date functions

https://daveismyname.com/show-working-days-of-a-month-excluding-weekends-with-php-bp

http://www.calendar-12.com/working_days/2016


<?php 
echo date("d")." "; 
echo date("m")." "; 
echo date("Y")." "; 
echo date("h:i:s A"); 

ECHO ' <br/>'; 
echo jddayofweek ( cal_to_jd(CAL_GREGORIAN, date("m"),date("d"), date("Y")) , 1 ); 

$day_of_week = date('N', strtotime('Monday'));

$tm = localtime($timestamp, TRUE);
$dow = $tm['tm_wday'];

$daynum = date("w", strtotime("wednesday"));

$daynum = date("N", strtotime("wednesday"));


$days = [
  1 => 'Sunday',
  2 => 'Monday',
  3 => 'Tuesday',
  4 => 'Wednesday',
  5 => 'Thursday',
  6 => 'Friday',
  7 => 'Saturday'
];

echo $days[date('N')];

$year = 2015;
$feb = (($year%100)and !($year%4)or !($year%400))+28;
echo $feb;



//Day in year should like this :

$month= array(0,31,$feb,31,30,31,30,31,31,30,31,30,31);

0=0, 1=January,2=February,....


$dayOfWeek = array("Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday");
echo $dayOfWeek[2]."<br />";
echo $dayOfWeek[8%7];
echo $dayOfWeek[date('N')];

//-------
$dayofweek = date('w', strtotime($date));
$result    = date('Y-m-d', strtotime(($day - $dayofweek).' day', strtotime($date)));

//-------------

function getWeekday($date) {
    return date('w', strtotime($date));
}

echo getWeekday('2012-10-11'); // returns 4

//-------------

echo 'Belgrade Date/Time: '._date("Y-m-d | h:i:sa", false, 'Europe/Belgrade').'<br>';

//-------
function getWeekForDate($date, $weekStartSunday = false){

    $timestamp = strtotime($date);

    // Week starts on Sunday
    if($weekStartSunday){
        $start = (date("D", $timestamp) == 'Sun') ? date('Y-m-d', $timestamp) : date('Y-m-d', strtotime('Last Sunday', $timestamp));
        $end = (date("D", $timestamp) == 'Sat') ? date('Y-m-d', $timestamp) : date('Y-m-d', strtotime('Next Saturday', $timestamp));
    } else { // Week starts on Monday
        $start = (date("D", $timestamp) == 'Mon') ? date('Y-m-d', $timestamp) : date('Y-m-d', strtotime('Last Monday', $timestamp));
        $end = (date("D", $timestamp) == 'Sun') ? date('Y-m-d', $timestamp) : date('Y-m-d', strtotime('Next Sunday', $timestamp));
    }

    return array('start' => $start, 'end' => $end);
}

//-----

public function getWeek($date){
    $date_stamp = strtotime(date('Y-m-d', strtotime($date)));

     //check date is sunday or monday
    $stamp = date('l', $date_stamp);      
    $timestamp = strtotime($date);
    //start week
    if(date('D', $timestamp) == 'Mon'){            
        $week_start = $date;
    }else{
        $week_start = date('Y-m-d', strtotime('Last Monday', $date_stamp));
    }
    //end week
    if($stamp == 'Sunday'){
        $week_end = $date;
    }else{
        $week_end = date('Y-m-d', strtotime('Next Sunday', $date_stamp));
    }        
    return array($week_start, $week_end);
}


//-----------




?>