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@ 2014-05-29T17:41:04Z

<?php

abstract class Singleton
{
    public static function getInstance()
    {
        static $instance = null;
        if (null === $instance) {
            $instance = new static();
        }

        return $instance;
    }
    abstract protected function __construct();  // prevent new instances using "new"
    final private function __clone(){}        // prevent cloning
    final private function __wakeup(){}       // prevent unserializing
}

class odb extends Singleton
{

    /*** Credentials ***/
    private $sPDOHost =        'localhost';
    private $sPDOUser =        'username';
    private $sPDOPass =        'password';
    private $sPDODB   =        'database';
	
    /*** Main Constructor ***/
    protected function __construct()
    {
        /*try
        {
            $this->oPDO = new PDO('mysql:host=' . $this->sPDOHost . ';' .
                            'dbname=' . $this->sPDODB, 
                            $this->sPDOUser, 
                            $this->sPDOPass);
        }
        catch (PDOException $oEx) 
        {
            die('MySQL/PDO Connection failed: <br /><pre>' . $oEx->getMessage() . "</pre>");
            return false; 
        }*/
		
		echo "hi";
		
    }
    

}


$Test = odb::getInstance();


?>

Output for git.master, git.master_jit, rfc.property-hooks: Warning: Private methods cannot be final as they are never overridden by other classes in /in/DXoqm on line 15 Warning: Private methods cannot be final as they are never overridden by other classes in /in/DXoqm on line 16 Warning: The magic method Singleton::__wakeup() must have public visibility in /in/DXoqm on line 16 hi

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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