PHP Singleton implementation example

SingletonPattern.php

<?php
class SingletonPattern
{
    private static $instance;
    
    private function __construct()
    {
        
    }
    
    public function getInstance()
    {
        if (!static::$instance instanceof SingletonPattern) {
            echo "Create Instance \n";
            static::$instance = new self();
        }
        echo "Returning instance \n";
        return static::$instance;
    }
}

SingletonPattern::getInstance();
SingletonPattern::getInstance();
SingletonPattern::getInstance();

/*
Output:
 Create Instance 
 Returning instance 
 Returning instance 
 Returning instance 
*/