PHP class for file operations

Last update on May 29 2025 13:10:23 (UTC/GMT +8 hours)

15. File Class with Total Size Calculation

Write a PHP class called 'File' with properties like 'name' and 'size'. Implement a static method to calculate the total size of multiple files.

Sample Solution:

PHP Code :

<?php
class File {
    public $name;
    public $size;

    public function __construct($name, $size) {
        $this->name = $name;
        $this->size = $size;
    }

    public static function calculateTotalSize($files) {
        $totalSize = 0;

        foreach ($files as $file) {
            if ($file instanceof File) {
                $totalSize += $file->size;
            }
        }

        return $totalSize;
    }
}

$file1 = new File("file1.txt", 1000);
$file2 = new File("file2.txt", 2000);
$file3 = new File("file3.txt", 1500);

$files = [$file1, $file2, $file3];
$totalSize = File::calculateTotalSize($files);

echo "Total size of files: " . $totalSize . " bytes";

?>

Sample Output:

Total size of files: 4500 bytes

Explanation:

In the above exercise -

The "File" class has two public properties: $name and $size, which represent the name and size of a file, respectively.
The constructor method __construct() is used to initialize the values of the properties when creating a new instance of the File class.
The calculateTotalSize() method is a static method that accepts an array of files as a parameter. It iterates through each file in the array, checks if it is an instance of the File class, and adds up the files' sizes.
The method returns the total size.

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP class File that stores file properties and implements a static method to calculate the combined size of multiple File instances.
Write a PHP script to create several File objects and use the static method to compute their total size.
Write a PHP function that reads file metadata into File objects and then outputs the total size via a static method.
Write a PHP program to simulate file management by using the File class's static method to generate a summary report of file sizes.

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