Undefined index: client_id" on line 1001 [duplicate] - php

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"Notice: Undefined variable", "Notice: Undefined index", "Warning: Undefined array key", and "Notice: Undefined offset" using PHP
(29 answers)
Closed 2 years ago.
any help you offer on this will be useful. Am working on my school project and this error code keeps popping up on the application "Undefined index: client_id" on line 1001"
Here is the code
public function onNewclientaddress(){
$addShipmentForm = Settings::get('addShipmentForm',true);
$data = post();
= \Spot\Shipment\Models\Address::where('user_id', $data['client_id'])->update(['default' => 0]);
if ( $addShipmentForm == "add_form_normal"){
$subitem = new \Spot\Shipment\Models\Address;
$subitem->name = htmlspecialchars($data['street_addr']);
$subitem->user_id = htmlspecialchars($data['client_id']);
$subitem->street = htmlspecialchars($data['street_addr']);
$subitem->city = htmlspecialchars($data['city_id']);
$subitem->zipcode = htmlspecialchars($data['postal_code']);
$subitem->country = htmlspecialchars($data['country_id']);
$subitem->default = 1;
$subitem->created_at = \Carbon\Carbon::now();
$subitem->updated_at = \Carbon\Carbon::now();
$subitem->save();
}
else{
line 1001 is the first line of code in the post. please pardon my English

Answer 1

This error indicates that $data['client_id'] is not being set. You will need to ensure that whatever form is providing this data, is passing client_id correctly.
You can see what is currently in $data with a line like:
die(var_dump($data));
This will output the data on the page.
Ensure your client_id field in your form has a name attribute:
name="client_id"