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<?php class ToStringMadness { private $data; public function __construct($data) { $this->data = $data; } public function __toString() { $data = array_map(function($item) { return $item; }, $this->data); sort($data); $rs = implode('-', $data); echo $rs."\n"; return $rs; } } $a = [ new ToStringMadness(['c','b']), new ToStringMadness(['c','b','a']), new ToStringMadness(['a','b']), ]; sort($a); /* usort($a, function(array $itemA, array $itemB) { sort($itemA); sort($itemB); $itemA = implode('-', $itemA); $itemB = implode('-', $itemB); echo $itemA.' vs '.$itemB."\n"; return strcmp($itemA, $itemB); }); */ print_r($a);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => ToStringMadness Object ( [data:ToStringMadness:private] => Array ( [0] => a [1] => b ) ) [1] => ToStringMadness Object ( [data:ToStringMadness:private] => Array ( [0] => c [1] => b ) ) [2] => ToStringMadness Object ( [data:ToStringMadness:private] => Array ( [0] => c [1] => b [2] => a ) ) )

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