Fatal error: Call to undefined method mysqli_result::rowCount() - php

Question

I have a problem switching from MYSQL to MYSQLi. The codes work fine with MYSQL but when i change the connection to MYSQLi, I received the error as stated above when I'm fetching my query. How can i fetch my queries using mysqli functions?
Code:
function __construct(){
$this->link = mysqli_connect('localhost', 'root', '', 'ajax_rating');
if (!$this->link) {
die('Connect Error (' . mysqli_connect_errno() . ') '
. mysqli_connect_error());
}
echo 'Success... ' . mysqli_get_host_info($this->link) . "\n";
}
function getItems($id = null){
if(isset($_GET['id']))
{
$query = $this->link->query("SELECT * FROM items WHERE id = '$id'");
}
else
{
$query = $this->link->query("SELECT * FROM items");
}
$rowCount = $query->rowCount();
if($rowCount >= 1)
{
$result = $query->fetchAll();
}
else
{
$result = 0;
}
return $result;

Answer 1

Use num_rows
Read MySQLi row_count
So final answer would be
function getItems($id = null)
{
if(isset($_GET['id']))
{
$query = $this->link->query("SELECT * FROM items WHERE id = '$id'");
}
else
{
$query = $this->link->query("SELECT * FROM items");
}
$rowCount = $query->num_rows;//change here
if($rowCount >= 1)
{
$result = $query->fetchAll();
}
else
{
$result = 0;
}
return $result;
}
EDIT 01
use mysqli_fetch_all instead of fetchAll()
mysqli_fetch_all($query,MYSQLI_ASSOC);
so answer world be
if($rowCount >= 1)
{
$result = mysqli_fetch_all($query,MYSQLI_ASSOC);
}

Answer 2

you can use num_rows for counting rows in DB and you can direct call connection like this :-
//for connection
$con = mysqli_connect("localhost", "root", "", "ajax_rating");
if(!$con)
{
echo "connection error";
}
//query
function getItems($id = null)
{
if(isset($_GET['id']))
{
$query = mysqli_query($con,"SELECT * FROM items WHERE id = '$id'");
}
else
{
$query = mysqli_query($con,"SELECT * FROM items");
}
if (mysqli_num_rows($query) > 0)//change here
{
while($row = mysqli_fetch_assoc($query))
{
$result=$row;
}
}
else
{
$result = 0;
}
return $result;
}