Check validation if date is < 3 months - php

Question

i want to get a validation from this case. If the entry date is less than now. So it would result an alert and redirect to the homepage. I wrote this one but it didn't work.
$dateEntry = array($current_employee->emp_dtentry);
if ($dateEntry < strtotime('+3 months')) {
echo "<script>alert('you don't have the right to access this menu')</script>";
redirect('new_leave','refresh');
}
Will appreciate any help, thanks before!

Answer 1

You are putting your date into an array and then comparing it to a timestamp. Why are you doing that?
Assuming $current_employee->emp_dtentry is a Unix timestamp:
if ($current_employee->emp_dtentry < strtotime('+3 months')) {
If it is not a Unix timestamp and is a valid date format you can do:
if (strtotime($current_employee->emp_dtentry) < strtotime('+3 months')) {
If it is not a valid date format you would need to use DateTime::createFromFormat() to parse the date and then do your comparison. That is easier to do with DateTime objects throughout.
// see manual format options
$empdtEntry = DateTime::createFromFormat('<format goes here>', ($current_employee->emp_dtentry);
$current_employee->emp_dtentry);
$threeMonthsFromNow = new DateTime(+3 months);
if ($empdtEntry < $threeMonthsFromNow ) {

Answer 2

As you are redirecting, your echo won't work. Either flash your javascript or use javascript there to redirect too.
Using flash:
$dateEntry = $current_employee->emp_dtentry;
if ($dateEntry < strtotime('+3 months')) {
$this->session->set_flashdata("javascript", "<script>alert('you don't have the right to access this menu')</script>");
redirect('new_leave');
}
Then within the new_leave view check it if exists and echo it:
if($this->session->flashdata('javascript')){
echo $this->session->flashdata('javascript');
}
Or using javascript do it as below:
$dateEntry = $current_employee->emp_dtentry;
if ($dateEntry < strtotime('+3 months')) {
echo "<script>alert('you don't have the right to access this menu'); window.location.href='new_leave';</script>";
}