php不比较变量，但做硬编码值

Question

I have a script that works and loops showing various results, but i want to chek if result match a given variable. It works it i enter it like '4' but wont if entered as a $myArray?

The code is

$vehicle_req = "4";

echo "Vehicle required is : ".$v[$vehicle_req]."<BR><BR>";
//----- GET COMPANIES IN AREA --------
echo "Companies in the area :<BR><BR>";

$result = mysqli_query($con,"SELECT *, ( 3959 * acos( cos( radians(53.83428999999999) ) * cos( radians( latitude ) ) * cos( radians( longitude ) - radians(-3.0399797000000035) ) + sin( radians(53.83428999999999) ) * sin( radians( latitude ) ) ) ) AS distance FROM clients HAVING distance < 30 ORDER BY distance LIMIT 0 , 20;");
while($row = mysqli_fetch_array($result)) {

    $name = $row['name'];
    $id = $row['id'];
    $vehicles = $row['vehicles'];
    echo "<B>".$id." -</B> ".$name."<BR>".$vehicles."<BR>";

    $myArray = explode(':', $vehicles);
    foreach($myArray as $my_Array){
        echo "<BR>".$v[$my_Array]."<BR>";
        echo $my_Array."<BR>";
        if($my_Array == '4')
            echo "MATCH vehicle 4<BR>";
    }
}