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<?php class Obj { private $_name; public function getName() { if ($this->_name === null) { // Heavy DB query $this->_name = 'Foo'; } return $this->_name; } } $objects = array(new Obj(), new Obj()); usort($objects, function($a, $b) { if ($a->getName() < $b->getName()) { return 1; } else if ($a->getName() > $b->getName()) { return -1; } return 0; }); var_dump($objects);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> object(Obj)#1 (1) { ["_name":"Obj":private]=> string(3) "Foo" } [1]=> object(Obj)#2 (1) { ["_name":"Obj":private]=> string(3) "Foo" } }

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