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@ 2019-06-03T02:07:40Z

<?php

class Database
{
    protected static $instance;
    protected $pdo;
    
    protected function __construct()
    {
        $this->pdo = new PDO('sqlite::memory:');
    }
    
    public static function instance()
    {
        if (null === self::$instance) {
            self::$instance = new self;
        }

        return self::$instance;
    }
    
    /**
     * @return PDOStatement|false
     */
    public function run($sql, $args = [])
    {
        if (!$args) {
            return $this->query($sql);
        }
        if ($stmt = $this->prepare($sql)) {
            if ($stmt->execute($args)) {
                return $stmt;
            }
        }
       
        return false;
    }
    
    public function __call($method, $args)
    {
        if (is_callable([$this->pdo, $method])) {
            //php 5.6+ variadic optimization (aka splat operator)
            return $this->pdo->$method(...$args);
            //PHP <= 5.5
            //return call_user_func_array(array($this->pdo, $method), $args);
        }
        throw new \BadMethodCallException(sprintf('Unknown method PDO::%s called!', $method));
    }
}


//RunTime code
$db = Database::instance();
var_dump($db->run('SELECT ?', ['foo', 'bar'])); //false

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 25 column index out of range in /in/OnDdn:31 Stack trace: #0 /in/OnDdn(31): PDOStatement->execute(Array) #1 /in/OnDdn(54): Database->run('SELECT ?', Array) #2 {main} thrown in /in/OnDdn on line 31
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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