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@ 2015-12-01T18:57:17Z

<?php
function converTo($date, $format = 'Y-m-d', $default = null, callable $funcExc = null )
    {
        if (empty($date)) {
            return $default;
        }
        if (!is_string($format)) {
            throw new \InvalidArgumentException("Неверный формат");
        }
        try {
            if (!($date instanceof \DateTime)) {
                if (is_numeric($date) && ( strlen($timestamp) == 13 || strlen($timestamp) == 10 )) {
                    $date = new \DateTime("@" . $date);
                } elseif (strtotime($date) !== false) {
                    $date = new \DateTime("@" . strtotime($date));
                } else {
                    $date = new \DateTime($date);
                }
            }
            if(!($date = $date->format($format))) {
                throw new \InvalidArgumentException("Произошла ошибка при приведению к заданному формату: " . $format);
            }
        } catch (\Exception $e) {
            if ($funcExc !== null) {
                call_user_func($funcExc, $date);
            }
            throw $e;
        }
        
        return $date;
    }
var_dump(converTo(['asda']));
die;

abstract class T
{
    static public $instanses;
    
    final private function __construct(){
        
    }
    
    public static function getInstance()
    {
        if (!(static::$instanses instanceof static)) {
            static::$instanses = new static;
        }
        
        return static::$instanses;
    }
}

class A extends T
{
    static public $instanses;
}

class B extends A
{
    static public $instanses;
}

$t = A::getInstance();
var_dump($t);

$t1 = B::getInstance();
var_dump($t1);

new B();

?>

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught TypeError: strtotime(): Argument #1 ($datetime) must be of type string, array given in /in/mjNV8:14 Stack trace: #0 /in/mjNV8(14): strtotime(Array) #1 /in/mjNV8(32): converTo(Array) #2 {main} thrown in /in/mjNV8 on line 14
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Warning: strtotime() expects parameter 1 to be string, array given in /in/mjNV8 on line 14 Fatal error: Uncaught TypeError: DateTime::__construct() expects parameter 1 to be string, array given in /in/mjNV8:17 Stack trace: #0 /in/mjNV8(17): DateTime->__construct(Array) #1 /in/mjNV8(32): converTo(Array) #2 {main} thrown in /in/mjNV8 on line 17
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40: Warning: strtotime() expects parameter 1 to be string, array given in /in/mjNV8 on line 14 Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct() expects parameter 1 to be string, array given' in /in/mjNV8:17 Stack trace: #0 /in/mjNV8(17): DateTime->__construct(Array) #1 /in/mjNV8(32): converTo(Array) #2 {main} thrown in /in/mjNV8 on line 17
Process exited with code 255.

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