How to get the last id from inserted row?

Question

I'm trying to get the ID of my master table to be inserted to my transaction table. The insert is happening inside a loop.

Behavior:

• Insert master
• Get id
• Insert Transaction
• Insert Master
• Get id
• Insert Transaction

Controller:

 //Insert Master
 foreach($arr_master as $res_master){

    /*$data['ID_REQUIREMENT_TRANS'] this is an auto-increment column. Inserted automatically*/

    $data['ID_REQUIREMENT']     = $res_master;
    $data['SENT_BY_DATE']       = date("Y-m-d H:i:s");                                                             
    $data['STATUS']             = 1;            

    $this->MAdmin->ins_assign_pic($data);

        //Insert Trans
        foreach($arr_trans as $res_trans){


            $data_d['ID_REQUIREMENT_TRANS'] = $id; //Need to get the last inserted id of the master table               
            $data_d['RECEIVED_BY']              = $res_trans; 
            $data_d['RECEIVED_BY_DATE']     = NULL; 
            $data_d['STATUS']                   = 1;            

            $this->MAdmin->ins_assign_pic_d($data_d);
        }
    }

Model:

function ins_assign_pic($data){
    $q_ins_assign_pic   = $this->db->insert('pm_requirement_assign_pic',$data);
    return $q_ins_assign_pic;

    $id = $this->db->insert_id(); 
    return $id;      //How to send this to my controller
    return true;
}

function ins_assign_pic_d($data_d){
    $q_ins_assign_pic_d = $this->db->insert('pm_requirement_assign_pic_d',$data_d);

    return $q_ins_assign_pic_d;
}

Answer 1

Try controller

$id = $this->MAdmin->ins_assign_pic($data);

And model

function ins_assign_pic($data){
    $q_ins_assign_pic   = $this->db->insert('pm_requirement_assign_pic',$data);
    //return $q_ins_assign_pic;

    $id = $this->db->insert_id(); 
    return $id;      //How to send this to my controller
   // return true;
}

Answer 2

Way 1

SELECT MAX( id ) FROM tableName;

Way 2

SELECT tableName.id FROM tableName ORDER BY tableName.id DESC LIMIT 0,1;

Answer 3

You are doing little wrong here. once return call in function then it will not execute further.

Model:

function ins_assign_pic($data){

    $q_ins_assign_pic   = $this->db->insert('pm_requirement_assign_pic',$data);

    if($q_ins_assign_pic){
        return $this->db->insert_id();
    } else {
        retun false;
    }

}

Controller :

 $newID = $this->MAdmin->ins_assign_pic($data);

Answer 4

您可以从表中获取最大ID：

select max(id) from table

Answer 5

mysqli_insert_id（）是您要查找的函数。