php - Count registered users in database

Solution:

First of all you should use count because of speed issues:

$sql = "SELECT COUNT(id) FROM persons";

To write a function that returns the number, you can do something like

function registredMemberCount ($connection) 
{
    $sql = "SELECT COUNT(id) FROM persons";
    $result = mysqli_query($connection,$sql);
    $rows = mysqli_fetch_row($result);
    return $rows[0];
}

and call it with

registredMemberCount($connection);

Solution:

require_once("connect.php");

function blah()
{
    global $connection;
    $sql = "SELECT COUNT(*) FROM persons";
    if ($result=mysqli_query($connection, $sql)){
        $row= mysqli_fetch_array($result);
        $rowcount = $row[0];
        mysqli_free_result($result);
    }
    return $rowcount;
}

echo blah();

Solution:

Lets see this,

require('connect.php');
function total_num_users(){
  $sql = "SELECT * FROM persons";
  $result = mysqli_query($connection,$sql);
  $count = mysqli_num_rows($result);
  return $count; 
}

And you can call and echo it like this.

echo total_num_users();