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<?php class Sorter { public static function sort($a, $b) { return $a - $b; } } spl_autoload_register(function($class) { echo "autoloading {$class}\n"; eval("class $class extends Sorter { }"); }); $array = array(3, 1, 4, 1, 5, 9, 2, 6, 5, 4); usort($array, array("Foo", "sort")); print_r($array);
Output for git.master, git.master_jit, rfc.property-hooks
autoloading Foo Array ( [0] => 1 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 4 [6] => 5 [7] => 5 [8] => 6 [9] => 9 )

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