retrieve mysql row with php - php

Question

I have been trying to retrieve a row from mysql database with no success. the row that i have been retrieving is only one. here is my code below:
<?php
$email = $_POST["email"];
$usrname = $_POST["username"];
$pass = $_POST["password"];
$code = $_POST["code"];
$status = $_POST["status"];
$userinfo = $_POST["user_info_id"];
$firstname = $_POST["fname"];
$middlename = $_POST["mname"];
$lastname = $_POST["lname"];
$img = $_POST["image"];
require "init.php";
$query = "select * from user where email like '".$email."';";
$result = mysqli_query($con,$query);
if (mysqli_num_rows($result)>0)
{
$response = array();
$code = "reg_false";
$message = "User already exist";
array_push($response,array("code"=>$code,"message"=>$message));
echo json_encode(array("server_response"=>$response));
}
else
{
$query = "insert into user (email,username,password,code,status,user_info_id) values('".$email."','".$usrname."','".$pass."','".$code."','".$status."','".$userinfo."');";
//$query2 = "insert into userinfo (fname,mname,lname) values('".$firstname."','".$middlename."','".$lastname."');";
$result = mysqli_query($con,$query);
if(!$result)
{
$response = array();
$code = "reg_false";
$message = "Error try again";
array_push($response,array("code"=>$code,"message"=>$message));
echo json_encode(array("server_response"=>$response));
}
else
{
$query = "select user_info_id from user group by user_info_id DESC limit 1";
$result = mysqli_query($con, $query);
if ($mysqli_num_rows($result)>0){
while($row = mysqli_fetch_assoc($result)) {
echo "id: " . $row["user_info_id"]. " - Name: " . $row["fname"]. " " . $row["lname"]. $row["mname"] . "<br>"; }
}
$query1 = "insert into userinfo (user_info_id,fname,mname,lname) values('".$result."','".$firstname."','".$middlename."','".$lastname."','".$img."');";
$result = mysqli_query($con,$query1);
$response = array();
$code = "reg_false";
$message = "Success";
array_push($response,array("code"=>$code,"message"=>$message));
echo json_encode(array("server_response"=>$response));
}
}
mysqli_close($con);
?>
The error I was getting was:
Notice: Undefined variable: mysqli_num_rows in C:\xampp\htdocs\loginapp\register.php on line 46
Fatal error: Uncaught Error: Function name must be a string in C:\xampp\htdocs\loginapp\register.php:46 Stack trace: #0 {main} thrown in C:\xampp\htdocs\loginapp\register.php on line 46
I am fairly new to php and mysql.

Answer 1

Please use this query to get num rows.
$query = "select * from user where email like '".$email."';";
$result = mysqli_query($con,$query);
$row_count = mysqli_num_rows($result);
Then use your if conditions like this
if ($row_count>0)
{
$response = array();
$code = "reg_false";
$message = "User already exist";
array_push($response,array("code"=>$code,"message"=>$message));
echo json_encode(array("server_response"=>$response));
}
else
{
.......