PHP Decode

<?php 
include("connection.php"); 
$role=mysqli_real_escape_string($conn,$_REQUEST['role']); 
if($role=='0'){$role="member";} 
elseif($role=='1'){$role="staff_member";} 
elseif($role=='2'){$role="accountant";} 
elseif($role=='3'){$role="administrator";}  
else{$role="member";} 
$query="SELECT `id`,`first_name`,`last_name` FROM `gym_member` WHERE `role_name`='$role'"; 
$res=$conn->query($query); 
$result=array(); 
if ($res->num_rows > 0)  
{ 
	$result['status']='1'; 
	$result['error']=''; 
	while($row = $res->fetch_assoc()) 
	{ 
		$r['name']=$row['first_name']." ".$row['last_name']; 
		if($role=='administrator'){$r['name']='Administrator';} 
		$r['id']=$row['id']; 
		$result['result']['members'][]=$r; 
	} 
} 
echo json_encode($result); 
?>