PHP Class Exercises : Sort an ordered integer array with the help of sort() function

PHP class: Exercise-4 with Solution

Write a PHP class that sorts an ordered integer array with the help of sort() function.

Sample array : array(11, -2, 4, 35, 0, 8, -9)

Sample Solution:

PHP Code:

<?php
// Define a class named array_sort
class array_sort
{
    // Declare a protected property named $_asort to store the array
    protected $_asort;
    
    // Define the constructor method which accepts an array $asort
    public function __construct(array $asort)
    {
        // Assign the provided array to the protected property $_asort
        $this->_asort = $asort;
    }
    
    // Define a method named alhsort to sort the array in ascending order
    public function alhsort()
    {
        // Create a copy of the original array
        $sorted = $this->_asort;
        // Sort the copied array in ascending order
        sort($sorted);
        // Return the sorted array
        return $sorted;
    }
}

// Create an instance of the array_sort class with an array argument
$sortarray = new array_sort(array(11, -2, 4, 35, 0, 8, -9));

// Call the alhsort method of the $sortarray object and print the sorted array
print_r($sortarray->alhsort())."\n";
?>

Output:

Array                                                       
(                                                           
    [0] => -9                                               
    [1] => -2                                               
    [2] => 0                                                
    [3] => 4                                                
    [4] => 8                                                
    [5] => 11                                               
    [6] => 35                                               
) 

Explanation:

In the exercise above,

• class array_sort {: This line defines a class named "array_sort".
• protected $_asort;: This line declares a protected property named '$_asort' to store the array.
• public function __construct(array $asort) {: This line defines the constructor method of the class which accepts an array '$asort' as a parameter.
• $this->_asort = $asort;: This line assigns the provided array '$asort' to the protected property '$_asort'.
• public function alhsort() {: This line defines a public method named "alhsort()" which sorts the array stored in '$_asort' in ascending order.
• $sorted = $this->_asort;: This line creates a copy of the original array stored in '$_asort'.
• sort($sorted);: This line sorts the copied array '$sorted' in ascending order using the sort function.
• return $sorted;: This line returns the sorted array.
• $sortarray = new array_sort(array(11, -2, 4, 35, 0, 8, -9));: This line creates a new instance of the array_sort class with the provided array as an argument.
• print_r($sortarray->alhsort())."\n";: This line calls the "alhsort()" method of the "$sortarray" object to sort the array and prints the sorted array using "print_r".

Flowchart :

PHP Code Editor:

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