二维数组去复
$a=array(
'0'=>array("a"=>"red","b"=>"green","c"=>"red","d"=>'hey'),
'1'=>array("a"=>"red","b"=>"green","c"=>"red","d"=>'hey'),
'2'=>array("a"=>"node","b"=>"green","c"=>"red","d"=>'hey')
);
foreach($a as $key=>$value){
$data[] =implode(',', $value);
}
$res = array_unique($data);
foreach($res as $key){
$array[] = explode(',', $key);
}