Code analysis of opening transactions under CI framework

This article introduces to you the code analysis of opening transactions under the CI framework. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

<?php
// 开启事务,CI框架
$this->Systems_model->base_connect();
$this->Systems_model->db->initialize();
$this->Systems_model->db->trans_begin();
try {
    $rs = $this->Systems_model->Update($data, $condition, &#39;user&#39;, false);
    if (!$rs) {
        throw new Exception("用户信息修改失败");
    }
    if ($rs) {
        
        // 删除用户角色中间表中的对应ID数据 重新插入
        $delRes = $this->Systems_model->delete_user_role($id);
        if ($delRes) {
            foreach ($roles as $k => $v) {
                $roleData[&#39;iUserID&#39;] = $id;
                $roleData[&#39;sRoleID&#39;] = $v;
                $res = $this->Systems_model->Save($act, $roleData, &#39;user_role&#39;, false);
            }
        } else {
            throw new Exception("改变原有的角色失败");
        }
        if ($res) {
            if ($this->Systems_model->db->trans_status() === FALSE) {
                $this->Systems_model->db->trans_rollback();
            } else {
                $this->Systems_model->db->trans_commit();
            }
            getPower(true);// 修改成功后会更新登录者的用户权限
            $this->Systems_model->base_close();
            outPrintApiJson(0, &#39;修改成功&#39;);
        } else {
            throw new Exception("修改角色失败");
        }
    }
} catch (Exception $e) {
    $this->Systems_model->db->trans_rollback();
    $this->Systems_model->base_close();
    $msg = $e->getMessage();
    outPrintApiJson(1, $msg);
    exit;
}

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