$get_active_user = get_active_login_id();
//GET ALL ACTIVE LOGIN ID
$currentdate = date("Y-m-d");
//CURRENT DATE
$Current_day = date('l');
//CURRENT DAY
$check_ph = Check_public_holiday($currentdate);
//CHECK CURRENT DATE IS IN PUBLIC HOLIDAY
$check_onduty = check_onduty($currentdate);
//CHECK CURRENT DATE IS IN ONDUTY
$get_login_id = array();
$get_login_id = get_login_id($currentdate);
//GET WHO ARE ALL ENTERED REPORT FOR CURRENT DATE
$ph_array = get_public_holiday();
// GET ALL PUBLIC HOLIDAY
$onduty_array = get_onduty();
$select_template = "SELECT * FROM EMAIL_TEMPLATE_DETAILS WHERE ET_ID=6";
$select_template_rs = mysqli_query($con, $select_template);
if ($row = mysqli_fetch_array($select_template_rs)) {
    $mail_subject = $row["ETD_EMAIL_SUBJECT"];
    $body = $row["ETD_EMAIL_BODY"];
}
$get_displayname = get_displayname();
$select_admin = "SELECT * FROM VW_ACCESS_RIGHTS_TERMINATE_LOGINID WHERE URC_DATA='ADMIN'";
$select_sadmin = "SELECT * FROM VW_ACCESS_RIGHTS_TERMINATE_LOGINID WHERE URC_DATA='SUPER ADMIN'";
$admin_rs = mysqli_query($con, $select_admin);
$sadmin_rs = mysqli_query($con, $select_sadmin);
if ($row = mysqli_fetch_array($admin_rs)) {
    $admin = $row["ULD_LOGINID"];
    //get admin
}
<?php
require_once 'google/appengine/api/mail/Message.php';
use google\appengine\api\mail\Message;
include "COMMON_FUNCTIONS.php";
include "CONNECTION.php";
date_default_timezone_set('Asia/Kolkata');
$get_active_user=array();
$get_active_user=get_active_login_id();//GET ALL ACTIVE LOGIN ID
$currentdate=date("Y-m-d");//CURRENT DATE
$Current_day=date('l');//CURRENT DAY
$check_ph=Check_public_holiday($currentdate);//CHECK CURRENT DATE IS IN PUBLIC HOLIDAY
$check_onduty=check_onduty($currentdate);//CHECK CURRENT DATE IS IN ONDUTY
$get_login_id=array();
$get_login_id=get_login_id($currentdate);//GET WHO ARE ALL ENTERED REPORT FOR CURRENT DATE
$ph_array=get_public_holiday();// GET ALL PUBLIC HOLIDAY
$onduty_array=get_onduty();//GET ALL ONDUTY
$select_template="SELECT * FROM EMAIL_TEMPLATE_DETAILS WHERE ET_ID=5";
$select_template_rs=mysqli_query($con,$select_template);
if($row=mysqli_fetch_array($select_template_rs)){
    $mail_subject=$row["ETD_EMAIL_SUBJECT"];
    $body=$row["ETD_EMAIL_BODY"];
}
$select_admin="SELECT * FROM VW_ACCESS_RIGHTS_TERMINATE_LOGINID WHERE URC_DATA='ADMIN'";
$admin_rs=mysqli_query($con,$select_admin);
if($row=mysqli_fetch_array($admin_rs)){
    $admin=$row["ULD_LOGINID"];//get admin
}

if($Current_day!='Sunday'){
    if($check_ph==0 && $check_onduty==0){
        $final_array=array_diff($get_active_user,$get_login_id);