PHP Challenges: Push all zeros to the end of an array

PHP Challenges - 1: Exercise-22 with Solution

Write a PHP program to push all zeros to the end of an array.

Input : (0,2,3,4,6,7,10)

Explanation :

Sample Solution :

PHP Code :

<?php
// Function to move all zeroes to the end of an array while maintaining the order of non-zero elements
function move_zero($arr)
{
    // Initialize a counter to track the position where non-zero elements will be placed
    $count = 0;
    
    // Get the size of the array
    $n = sizeof($arr);
    
    // Iterate through the array
    for ($i = 0; $i < $n; $i++)
    {
        // If the current element is non-zero
        if ($arr[$i] != 0)
        {
            // Move the non-zero element to the position tracked by $count and increment $count
            $arr[$count++] = $arr[$i];
        }
    }
    
    // Fill the remaining positions in the array with zeroes
    while ($count < $n)
    {
        $arr[$count++] = 0;
    }
    
    // Return the modified array
    return $arr;
}

// Test arrays
$num_list1 = array(0, 2, 3, 4, 6, 7, 10);
$num_list2 = array(10, 0, 11, 12, 0, 14, 17);

// Test the move_zero function with the test arrays and print the results
print_r(move_zero($num_list1));
print_r(move_zero($num_list2));
?>

Explanation:

Here is a brief explanation of the above PHP code:

• Function definition (move_zero):
• The function "move_zero()" takes an array '$arr' as input.
• It initializes a counter '$count' to keep track of the position where non-zero elements will be placed.
• Inside the function:
• It iterates through the array '$arr'.
• For each element in the array, if it is non-zero, it moves that element to the position tracked by '$count' and increments '$count'.
• After iterating through the array, it fills the remaining positions in the array with zeroes.
• Function Call & Testing:
• The "move_zero()" function is tested with two different arrays ($num_list1 and $num_list2).
• Finally, the "print_r()" function prints the modified arrays after moving zeroes to the end.

Sample Output:

Array                                                       
(                                                           
    [0] => 2                                                
    [1] => 3                                                
    [2] => 4                                                
    [3] => 6                                                
    [4] => 7                                                
    [5] => 10                                               
    [6] => 0                                                
)                                                           
Array                                                       
(                                                           
    [0] => 10                                               
    [1] => 11                                               
    [2] => 12                                               
    [3] => 14                                               
    [4] => 17                                               
    [5] => 0                                                
    [6] => 0                                                
)           

Flowchart:

PHP Code Editor:

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