PHP patterns - Singleton live example

Explore a live example of the Singleton Pattern in PHP. Creating a single instance of a class with real-time code demonstrations. Ideal for understanding Singleton applications in database connections and logging systems in PHP development.

PHP Code Editor

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<?php
namespace RefactoringGuru\Singleton\Conceptual;
/**
 * The Singleton class defines the `GetInstance` method that serves as an
 * alternative to constructor and lets clients access the same instance of this
 * class over and over.
 */
class Singleton
{
    /**
     * The Singleton's instance is stored in a static field. This field is an
     * array, because we'll allow our Singleton to have subclasses. Each item in
     * this array will be an instance of a specific Singleton's subclass. You'll
     * see how this works in a moment.
     */
    private static $instances = [];
    /**
     * The Singleton's constructor should always be private to prevent direct
     * construction calls with the `new` operator.
     */
    protected function __construct() { }
 
 
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