php code to check current date and insert current timestamp into mySQL

Question

<?php

if($_SERVER['REQUEST_METHOD']=='POST'){
 $staffID = $_POST['staffID'];

date_default_timezone_set("Asia/Singapore");

$checkInTime = $_SERVER['REQUEST_TIME'];
 $today = date('Y-m-d');

require_once('dbconnect.php');

$sqlcheck = "SELECT * FROM StaffAttendacne WHERE StaffID = '$staffID' AND Date ='$today'";

$sql = "INSERT INTO StaffAttendance (StaffID,Date,CheckInTime) VALUES ('$staffID','$today','$checkInTime')";

$result = mysqli_query($con,$sqlcheck);
 $check = mysqli_fetch_array($result);

if (isset($check)){
 echo "You have already checked in";
 }else {
 echo"$checkInTime";
 mysqli_query($con,$sql);
 }

how to write php insert check in time (insert time stamp) into SQL database. Time is when app launch . I have written this block of code but did not work

Answer 1

you are using if (isset($check)){ which will always be true because you ahve defined $check just above it therefore your mysqli_query($con,$sql); is not running.

You should instead use if(count($check) > 0)