php 獲取當前成員在數組中的位置

$phone = $this->input_data['phone'];
// 成員數
$member_count = $user_customer_village->where(['house_id' => $house_id])->count();
if ($role === RoleEnum::HOST) { // 業主
    // 業主必須傳手機號
    if (!$phone) {
        $this->json->err('請填寫手機號');
    }
    if (!Verify::checkMobile($phone)) {
        $this->json->err('請填寫正確的手機號');
    }
} else { // 成員
    if (!$phone) {
        // 自動生成手機號
        $host_info = $user_customer_village->where(['house_id' => $house_id, 'role' => RoleEnum::HOST])->find();
        if (!$host_info) {
            $this->json->err('當前房屋未設置業主');
        }
        $host_id = $host_info['customer_id'];
        $user_customer_info = $user_customer->where(['id' => $host_id])->find();
        if (!$user_customer_info) {
            $this->json->err('業主對應用戶不存在');
        }
        if ($id) {
            $member_ids = $user_customer_village->where(['house_id' => $house_id])->order('role asc,id asc')->getField('id',true);
            $member_ids = array_flip($member_ids);
            $pos_val = $member_ids[$id];
            // 獲取當前成員在家庭中的位置
            $phone = $user_customer_info['phone'] . '-' . ($pos_val + 1);
        } else {
            $phone = $user_customer_info['phone'] . '-' . ($member_count + 1);
        }
    }
}

$member_ids = $user_customer_village->where(['house_id' => $house_id])->order('role asc,id asc')->getField('id',true);
$member_ids = array_flip($member_ids);
$pos_val = $member_ids[$id];
// 獲取當前成員在家庭中的位置
$phone = $user_customer_info['phone'] . '-' . ($pos_val + 1);