<?php
//Database login variables
    $dbusername = "id5096752_root";
    $dbpassword = "***";
    $host = "localhost";
    $mydb = "id5096752_disspill";
//Connect to database
    $con = new mysqli ($host, $dbusername, $dbpassword);
    if($con)
    {
        echo "Connection succesful";
    }
    else
    {
        echo "Connection error";
    }
    mysqli_select_db($con,$mydb) or die
    ("Database selection error");

//Query
    $SQL = "UPDATE contenedores SET ocupado='$_GET[ocupado]', nombrePastilla='$_GET[nombrePastilla]', cantidadPastillas = '$_GET[cantidadPastillas]' WHERE numeroContenedor = '$_GET[numeroContenedor]'";
//Execute query
    mysqli_query($con,$SQL);
?>

byte mac[] = { 0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x19 };
char bdServer[] = "disspill.000webhostapp.com";

...

Ethernet.begin(mac);
client.stop();
Serial.println("Connecting with BD");
if(client.connect(bdServer, 80))
{
    Serial.println("Connected");
    client.print("GET /phpcommands/updateData.php?numeroContenedor=1&ocupado=si&nombrePastilla=paracetamol&cantidadPastillas=7");
    client.println(" HTTP:/1.0");
    client.println("Host: disspill.000webhostapp.com");
    client.println("Connection: close");
    client.println();
    client.stop();
}
else
{
    Serial.println("Error");
}