php multidimensional associative array

1$singleArray = []; 
2foreach ($parentArray as $childArray) 
3{ 
4    foreach ($childArray as $value) 
5    { 
6    $singleArray[] = $value; 
7    } 
8}
9

1Array
2(
3    [klaussen] => Array
4        (
5            [physics] => 85
6            [maths] => 78
7            [chemistry] => 89
8        )
9
10    [morkel] => Array
11        (
12            [physics] => 68
13            [maths] => 73
14            [chemistry] => 79
15        )
16
17    [styen] => Array
18        (
19            [physics] => 62
20            [maths] => 67
21            [chemistry] => 92
22        )
23
24)
25

1$cars = array
2  (
3  array("Volvo",22,18),
4  array("BMW",15,13),
5  array("Saab",5,2),
6  array("Land Rover",17,15)
7  );

1<?php 
2/* 
3There are 3 Types of array in php  
41. Indexed arrays - Arrays with a numeric index
52. Associative arrays - Arrays with named keys
63. Multidimensional arrays - Arrays containing one or more arrays
7
8This is the third one - Multidimensional arrays
9*/
10
11$carsModel = array
12  (
13  array("Maruti",21,28),
14  array("BMW",05,75),
15  array("Tata",25,12),
16  array("Land Rover",11,20)
17  );
18?>