PHP - Where Xml Attribute = Php $variable

Hi All,

Not sure if this is a silly question so here we go.

I have some divs that have data attributes (data-value).  When i submit and post the form, can i use these values as part of the submission and put their data-value into the db?

Thanks as always in advance.

The following script came from using-custom-paths.  It appears that these are PHP 8's new attributes, correct?

<?php
// api/src/Entity/Question.php

#[ApiResource(
    subresourceOperations: [
        'api_questions_answer_get_subresource' => [
            'method' => 'GET',
            'path' => '/questions/{id}/all-answers',
        ],
    ],
)]
class Question
{
}

I currently am using PHP7 and will need to convert them.  Does the following look correct?  Thanks
 

/**
 * @ApiResource(
 *     subresourceOperations = {
 *      "api_questions_answer_get_subresource" = {
 *          "method" = "GET",
 *          "path" = "/questions/{id}/all-answers"
 *     }
 *  }
 * )
 */

class ConnectMe2Db
{
	public $dbname  = 'somedatabase';
	public $dbuname = 'root';
	public $dbpass  = '';
	public $dbhost  = 'localhost';
	
	function __construct()
	{
		$mysqli = new mysqli($this->dbhost,$this->dbuname,$this->dbpass,$this->dbname)
			or die ('ERROR: '.$mysqli->connect_errno);
		return $mysqli;
	}
       # OTHER CODES...
}

class DatabaseUsers
{
	private $dbconnection;
	
        function __construct()
	{
		$this->dbconnection = new ConnectMe2Db();#mysqli object will be passed to this attribute '$dbconnection'
	}
	
	public function session($username, $password)
	{
		$UserName = mysqli_real_escape_string($this->dbconnection,$username);
		$Password = mysqli_real_escape_string($this->dbconnection,md5($password));
		$querry = "SELECT * FROM trakingsystem.login WHERE username='$username' and password='$password'";
		$result = mysqli_query($this->dbconnection,$querry) or die (mysqli_error($this->dbconnection));
		$count = mysqli_num_rows($result);
		$row = mysqli_fetch_array($result);
		if ($count > 0)
			{
                              #some code here
			}
	}
#some other code here
}

#outputs 2 of these:

Warning: mysqli_real_escape_string() expects parameter 1 to be mysqli

mysqli_query() expects parameter 1 to be mysqli

mysqli_error() expects parameter 1 to be mysqli

$data[] = array(
'label' => $row['name'],
'value' => $row['name'],
'id' => $row['id']
);
echo json_encode($data);

jQuery(document).ready(function(){
$('#input_id').autocomplete({source:'my_jquery_suggest.php',    select: function(event, ui) {
                $(event.target).val(ui.item.value);
                $('#form_id').submit();
                return false;
            },
minLength:2,delay: 1000}).focus(function () {
               
                window.pageIndex = 0;
                $(this).autocomplete("search");
            });
...