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@ 2014-10-08T18:40:26Z

<?php

set_error_handler(function ($errno, $errstr) { global $errored; $errored = TRUE; return TRUE; });

$errored = FALSE;
$excludedClasses = [ // These cause fatal errors on instantiation
    "Closure",
    "SQLite3",
    "Filter",
    "PDO"
];

var_dump(
    array_filter(
        get_declared_classes(),
        function ($className) use (&$errored, $excludedClasses) {
            $errored = FALSE;
            $class = new ReflectionClass($className);
            if (!$class->isInstantiable() || $class->hasMethod('__construct') && (new ReflectionMethod("$className::__construct"))->isPrivate()) {
                return FALSE;
            }
            foreach ($excludedClasses as $bannedClass) {
                if (substr($className, 0, strlen($bannedClass)) === $bannedClass) {
                    return FALSE;
                }
            }

            if (!(new ReflectionClass($className))->hasMethod('__toString')) {
                try {
                    $x = new $className;
                    $x = (string)$x;
                    return $errored;
                } catch (Exception $e) {
                    return FALSE;
                }
            }
            return FALSE;
        }
    )
);

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught Error: The "Generator" class is reserved for internal use and cannot be manually instantiated in /in/grUXi:30 Stack trace: #0 [internal function]: {closure}('Generator') #1 /in/grUXi(14): array_filter(Array, Object(Closure)) #2 {main} thrown in /in/grUXi on line 30
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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