Generating an automatic student registration number using php - php

Question

I want to generate an automatic student registration number composed of "ID N0.","INTAKE"
and the current year, each time a student is recorded.
EX: KIAC 0013/INTAKE 4/2019.
But the problem is that the intake value which is 4 only increments once and i want it to increment each time a new intake starts.
I wasn't able to increment the intake value
as a new intake starts,in march and in september. so this means that students
for the september intake will be having "KIAC 0013/INTAKE 4/2019" as registration number
and those of march 2020 "KIAC 0013/INTAKE 5/2020" again
september 2020 "KIAC 0013/INTAKE 6/2020" and so on... but the intake value would still be 5 for september 2020 also.. this means it increments no more, the code below is a sample code and it doesn't insert into the database i was just testing for the result..
<?php
$k = "KIAC";
$id = "0013/INTAKE";
$month = date("m");
$year = date("Y");
if($month == '3'){
$intake = 3;
$intake++;
echo $k . " " . $id . " " . $intake. "/". $year;
}
else if($month == '9'){
$intake = 3;
$intake++;
echo $k . " " . $id . " " . $intake. "/". $year;
}
else{
$intake = 3;
echo $k . " " . $id . " " . $intake. "/". $year;
}
?>
I expected the output to be "KIAC 0013/INTAKE 4/2019." and the intake value
would change as a new intake starts.

Answer 1

I'm not sure if i understod your question, but maybe you could do something like this:
$k = "KIAC";
$id = "0013/INTAKE";
$month = date("m");
$year = date("Y");
$base_year = 2019; // Set a base when the intakes started
$intake = intval($year) - $base_year; // This will increase for every year
$increase_with = $intake++;
if($month == '3'){
$intake += $increase_with;
echo $k . " " . $id . " " . $intake. "/". $year;
}
else if($month == '9'){
$increase_with++;
$intake += $increase_with;
echo $k . " " . $id . " " . $intake. "/". $year;
}
Edited to make intake number unique.

Answer 2

You have to write condition in IF so between march to august it will increase 1 and after September intake it will increase with 2.
<?php
$k = "KIAC";
$id = "0013/INTAKE";
$month = date("m");
$year = date("Y");
$base_year = 2016;
$intake = intval($year) - $base_year;
if ($month == 3) {
$intake += 1;
echo $k . " " . $id . " " . $intake . "/" . $year;
} else if($month == 9) {
$intake += 2;
echo $k . "enter code here " . $id . " " . $intake . "/" . $year;
}else{
echo $k . " " . $id . " " . $intake. "/". $year;
}
?>