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@ 2014-10-08T19:06:26Z

w<?php

$errored = FALSE;

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

$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')) {
				return true
            }
            return FALSE;
        }
    )
);

Output for 5.4.0 - 5.4.32: Parse error: syntax error, unexpected '}' in /in/H4pr9 on line 31
Process exited with code 255.
Output for 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/H4pr9 on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/H4pr9 on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/H4pr9 on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `')'' in /in/H4pr9 on line 5
Process exited with code 255.

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