如何从二维数组中随机取每组相同ID的一条信息？

[只是喜欢]

$data = array(
            array(
                "eid" => "2","name" => "A1"
            ),
            array(
                "eid" => "2","name" => "A2"
            ),
            array(
                "eid" => "2","name" => "A3"
            ),
            array(
                "eid" => "8","name" => "B1"
            ),
            array(
                "eid" => "8","name" => "B2"
            ),
            array(
                "eid" => "5","name" => "C1"
            ),
            array(
                "eid" => "5","name" => "C2"
            )
    );

想要的结果：
$data = array(
array(
"eid" => "2","name" => "A2"
),
array(
"eid" => "8","name" => "B2"
),
array(
"eid" => "5","name" => "C1"
)
);

相同的eid随机取1条（数据多是随机取不同的多条，比如相同的eid随机取5条）