PHP Exercises: Return all elements in a given array except for the first one

PHP: Exercise-90 with Solution

Write a PHP program to return all elements in a given array except for the first one.

Sample Solution:

PHP Code:

<?php
// Licence: https://bit.ly/2CFA5XY

// Function definition for 'tail' that takes an array of items as a parameter
function tail($items)
{
    // Use 'count' to check if the array has more than one element
    // If true, use 'array_slice' to return all elements except the first one, otherwise return the original array
    return count($items) > 1 ? array_slice($items, 1) : $items;
}

// Call 'tail' with an array and display the result using 'print_r'
print_r(tail([1, 2, 3]));

?>

Explanation:

• Function Definition:
• The function tail is defined to take one parameter:
• $items: an array of items.
• Counting Elements:
• The function uses count($items) to determine the number of elements in the array.
• Conditional Logic:
• If the array has more than one element (count($items) > 1):
• array_slice($items, 1) is called to return a new array containing all elements except the first one.
• If the array has one or no elements, the function returns the original array ($items).
• Purpose:
• The tail function effectively retrieves all elements of the array except the first, but if the array has only one or no elements, it returns the array as-is.
• Function Call:
• The tail function is called with the array [1, 2, 3].
• Displaying Results:
• The result of the tail function call is displayed using print_r, which shows the array excluding the first element. In this case, the output will be [2, 3].

Output:

Array
(
    [0] => 2
    [1] => 3
)

Flowchart:

PHP Code Editor:

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