Php Program to Find maximum element of each row in a matrix

Given a matrix, the task is to find the maximum element of each row.
Examples:

Input :  [1, 2, 3]
         [1, 4, 9]
         [76, 34, 21]

Output :
3
9
76

Input : [1, 2, 3, 21]
        [12, 1, 65, 9]
        [1, 56, 34, 2]
Output :
21
65
56

Approach : Approach is very simple. The idea is to run the loop for no_of_rows. Check each element inside the row and find for the maximum element. Finally, print the element. 
Below is the implementation : 

PHP

<?php
// PHP program to find maximum
// element of each row in a matrix
$N = 4;


// Print array element
function printArray($result, $no_of_rows)
{
    for ($i = 0; $i < $no_of_rows; $i++)
    {
        echo $result[$i]."
";
    }

}

// Function to get max element
function maxelement($no_of_rows, $arr)
{
    global $N;
    $i = 0;

    // Initialize max to 0 at beginning
    // of finding max element of each row
    $max = 0;
    $result=array_fill(0,$no_of_rows,0);
    while ($i < $no_of_rows)
    {
        for ($j = 0; $j < $N; $j++)
        {
            if ($arr[$i][$j] > $max)
            {
                $max = $arr[$i][$j];
            }
        }
        $result[$i] = $max;
        $max = 0;
        $i++;

    }
    printArray($result,$no_of_rows);

}

// Driver code
$arr = array(array(3, 4, 1, 8),
                array(1, 4, 9, 11),
                array(76, 34, 21, 1),
                array(2, 1, 4, 5));
// Calling the function
maxelement(4, $arr);

// This code is contributed by mits
?>

Output :

8
11
76
5

Time Complexity: O(N * M) where N is the number of rows and M is the number of columns in the given matrix.

Space Complexity: O(N) where N is the number of rows in the given matrix.

Please refer complete article on Find maximum element of each row in a matrix for more details!