PHP Exercises: Create a new array from a given array of integers shifting all zeros to left direction

Last update on May 28 2025 13:07:07 (UTC/GMT +8 hours)

127. Shift Zeros to Left in Array

Write a PHP program to create a new array from a given array of integers shifting all zeros to left direction.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that takes an array of numbers as a parameter
function test($numbers)
{ 
    // Initialize a variable to keep track of the position of '0'
    $pos = 0;

    // Iterate through the elements of the input array using a for loop
    for ($i = 0; $i < sizeof($numbers); $i++)
    {
        // Check if the current element is equal to '0'
        if ($numbers[$i] == 0)
        {
            // Swap the positions of the current element and the element at position $pos
            $numbers[$i] = $numbers[$pos];
            $numbers[$pos++] = 0;
        }
    }

    // Return the modified array
    return $numbers;
}   

// Call the 'test' function with an example array and store the result in the variable 'result'
$result = test([1, 2, 0, 3, 5, 7, 0, 9, 11] );

// Print the result array as a string
echo "New array: " . implode(',', $result);
?>

Sample Output:

New array: 0,0,1,3,5,7,2,9,11

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to rearrange an array so that all zeros are moved to the left while preserving the order of non-zero elements.
Write a PHP function to partition an array into zeros and non-zeros, then merge them with zeros preceding.
Write a PHP program to use a custom sorting algorithm to reposition zeros to the left side of the array.
Write a PHP script to iterate over an array and rebuild it with zeros leading and the remainder following in original order.

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PHP Code Editor:

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