While loop not running if statements right - php

Question

So I have have a while loop and it does work in terms of the database and if statements etc.. however for some reason the if statements are not running correctly
Here is the code (edited)
<?php session_start( ); ?>
<?php include 'core/init.php';
include 'includes/header.php';
require 'core/database/db_connection.php';
function friend_check($user_id, $friend_id) {
$result = mysql_query("SELECT * FROM fyp_friends WHERE user_id={$user_id} AND friend_id={$friend_id} AND type=1");
$num_rows = mysql_num_rows($result);
echo $num_rows;
}
?>
<link rel="stylesheet" type="text/css" href="style/members.css">
<?php
/*------------------------------------------------------------------------------------- --------------------*/
//Get user information from fyp_users
$sql = ("SELECT user_id, user_name, first_name, last_name, email, profile FROM fyp_users");
$user =mysql_query($sql) or die(mysql_error());
//$userinfo = mysql_fetch_array($user);
//echo $userinfo['user_id'];
//Get friend information from fyp_users
//$sql = ("SELECT user_id, friend_id, type FROM fyp_friends");
//$friend =mysql_query($sql) or die(mysql_error());
//$friendinfo = mysql_fetch_array($friend);
//echo $friendinfo['user_id'];
?>
<?php
while ($usermain = mysql_fetch_array($user)) {
echo '<div id="friends">';
echo '<div class="profilepiclarge"><img src="', $usermain['profile'], '"alt="', $usermain['first_name'],'\'s Profile Image"></div>';
?>
<div class="userinfo">
<?php
echo "</br>{$usermain['first_name']}";
echo "</br>{$usermain['last_name']}";
echo "</br>{$usermain['email']}";
echo "</br>{$usermain['user_name']}</br>";
echo '<div class="viewprofile">';
echo "<a href='profile.php?user_name={$usermain['user_name']}'>View Profile</a>";
echo '</div>';
$sql = ("SELECT user_id, friend_id, type FROM fyp_friends WHERE user_id= {$usermain['user_id']}");
$friend =mysql_query($sql) or die(mysql_error());
$friend_result = friend_check($session_user_id, $usermain['user_id']);
echo $friend_result;
if ($usermain['user_id'] === $session_user_id) {
echo "This is you";
} else if (intval($friend_result) == 1) {
echo '<div class="removefriend">';
echo"Remove Friend";
echo '</div>';
} else if (intval($friend_result) == 0) {
echo '<div class="addfriend">';
echo"Add Friend";
echo '</div>';
}
echo "</div>";
echo "</div>";
//If statment to go here to see if already friends dont show add friends function also if current user is logged in sont show it. If already friends the option
//to remove the user as a fried becomes avalible
}

Answer 1

Your second query has no WHERE clause so i'm not seeing how you are listing friends related to the user in question, change the query to :
SELECT user_id, friend_id, type FROM fyp_friends WHERE user_id = $usermain['user_id']