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The Liskov Substitution Principle PHP code example · GitHub

Created May 23, 2023 09:48

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The Liskov Substitution Principle PHP code example

This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters <?php abstract class Product { private string $filePath; public function __construct(string $filePath) { $this->filePath = $filePath; } public function download() { // Set headers for downloading file header('Content-Type', 'application/octet-stream'); header('Content-Disposition: attachment; filename="' . basename($this->filePath) . '"'); // Read the file stream and output it to the response readfile($this->filePath); exit; } } class Audio extends Product {} class Video extends Product {} class Chocolate extends Product {} function download(Product $product): void { $product->download(); } download(new Audio('./dummy.pdf')); // download(new Chocolate('What do I pass???'));

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