PHP Exercises: Shift an element in left direction and return a new array

Last update on May 28 2025 13:04:38 (UTC/GMT +8 hours)

124. Shift Array Elements Left

Write a PHP program to shift an element in left direction and return a new array.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that takes an array of numbers as a parameter
function test($numbers)
{ 
    // Calculate the size of the input array
    $size = sizeof($numbers);

    // Initialize an array to store the shifted numbers
    $shiftNums = [$size];

    // Iterate through the elements of the input array using a for loop
    for ($i = 0; $i < $size; $i++)
    {
        // Shift the numbers to the left by one position, considering the circular nature of the shift
        $shiftNums[$i] = $numbers[($i + 1) % $size];
    }

    // Return the array of shifted numbers
    return $shiftNums;
}   

// Call the 'test' function with an example array and store the result in the variable 'result'
$result = test([10, 20, -30, -40, 50] );

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

Sample Output:

New array: 20,-30,-40,50,10

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to create a new array by shifting all elements one position to the left, moving the first element to the end.
Write a PHP function to perform a left rotation on an array and return the resulting array.
Write a PHP program to simulate cyclic left rotation of an array using a temporary variable.
Write a PHP script to implement a left-shift algorithm that moves the head element to the tail of the array.

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