how to count common values ina array - php

Question

Array (
[attendance_id] => 18
[attendance] => 1
[student_id] => 1
[date] => 2015-01-19
[in_time] => 00:00:00
[out_time] => 00:00:00
[fee_amount] => 15000 )
Array (
[attendance_id] => 19
[attendance] => 1
[student_id] => 2
[date] => 2015-01-19
[in_time] => 00:00:00
[out_time] => 00:00:00
[fee_amount] => 2000 )
Array (
[attendance_id] => 20
[attendance] => 0
[student_id] => 1
[date] => 2014-01-15
[in_time] => 00:00:00
[out_time] => 00:00:00
[fee_amount] => 0
)
I want to count the common values in these Arrays. Please guide how to do this.
As result I want to get this:
date [2014-01-15 ] => 2
attendance [1] => 2
This is actually for a small institute where single student details for a day may entered into the system as above. So I just want to make a report day end saying how many students has come to the class on specific day and how many didn't.

Answer 1

Try this..
<?php
$array = array(array('18','2015-01-19','15000'),array('2015-01-19','18','22'),array('20','11','22'));
$newcountarray = array();
foreach ($array as $key=>$value) {
foreach ($value as $newvalue) {
if ($foundKey = array_key_exists($newvalue,$newcountarray)) {
$newcountarray[$newvalue] += 1;
}
else{
$newcountarray[$newvalue] = 1;
}
}}
print_r($newcountarray);
?>
Output
Array ( [18] => 2 [2015-01-19] => 2 [15000] => 1 [22] => 2 [20] => 1 [11] => 1 )

Answer 2

Yes Deena Let's say
$array = array(array('18',<==row id no
'2015-01-19',<=date
'1',<=student id>
'2'<=present(1),absent(2))),
array(array('19',<==row id no
'2015-01-19',<=date
'2',<=student id>
'1'<=present(1),absent(2))),
its like for the day 2015-01-19 i want to get all 2 stuudent and among them 1 Student is present and 1 is absent