how do I exclude table field MYSQL - php

Question

Sorry about the strange title, but I am having a small issue if the user type is 2 or 3 then I need the user not to be able to insert or update a few fields, but instead of creating a number of insert queries listed below are a few fields I need not updated.
AMStatus,HQStatus,approvedforsite
public function databaseinsert($data)
{
$this->data = $data;
switch($this->data['action']){
case "newlead":
$this->insert("customer_detail",
"TradingName,Street,City,State,PostCode,Industry,SubCategories,Membership,LeadStatus,AMStatus,HQStatus,approvedforsite,Salutation,FirstName,LastName,Website,Company,ABN_ACNNumber,Phone,Mobile,Notes,Description",
"'{$this->data['tradingname']}',
'{$this->data['street']}',
'{$this->data['suburb']}',
'{$this->data['state']}',
'{$this->data['postcode']}',
'{$this->data['category']}',
'{$this->data['subcategory']}',
'{$this->data['membership']}',
'{$this->data['salestatus']}',
'{$this->data['managerstatus']}',
'{$this->data['hqstatus']}',
'{$this->data['publishtoweb']}',
'{$this->data['title']}',
'{$this->data['firstname']}',
'{$this->data['lastname']}',
'{$this->data['webaddress']}',
'{$this->data['companyname']}',
'{$this->data['abnacn']}',
'{$this->data['phonenumber']}',
'{$this->data['mobile']}',
'{$this->data['notes']}',
'{$this->data['businessdescription']}'
");
break;
}
}

Answer 1

You need to do it in your script handle database fields and values by applying conditions. and make strings of both according to different user types before applying them in $this->insert function.
Something like below:
if($usertype=='yourtype')
{
$fieldsstr="TradingName,Street,City.................";
$valuestr=$this->data['tradingname'].",".$this->data['field2'].",".......
}
else
$fieldsstr="TradingName,Street.................";
$valuestr=$this->data['tradingname'].",".$this->data['field2'].",".......
}
$this->insert("customer_detail",$fieldsstr,$valuestr);