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<?php class A { public static function autoload($class){} } class B { public static function autoload($class){} } class C { public static function autoload($class){} } spl_autoload_register(array('A', 'autoload'), true); spl_autoload_register(array('B', 'autoload'), true); var_dump(spl_autoload_functions()); spl_autoload_register(array('C', 'autoload'), true, true); var_dump(spl_autoload_functions());
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> array(2) { [0]=> string(1) "A" [1]=> string(8) "autoload" } [1]=> array(2) { [0]=> string(1) "B" [1]=> string(8) "autoload" } } array(3) { [0]=> array(2) { [0]=> string(1) "C" [1]=> string(8) "autoload" } [1]=> array(2) { [0]=> string(1) "A" [1]=> string(8) "autoload" } [2]=> array(2) { [0]=> string(1) "B" [1]=> string(8) "autoload" } }

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