<?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);
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