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<?php spl_autoload_register(function ($class) { echo 'Class: '.$class."\n"; if ($class === 'Foo') { class Foo implements Bar {} } throw new RuntimeException('Class not found'); }); try { class_exists('Foo'); } catch (RuntimeException $e) { echo $e->getMessage(); }
Output for git.master, git.master_jit, rfc.property-hooks
Class: Foo Class: Bar Class not found

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