PHP The following is an example of a class with a fluent interface implemented in PHP:

class Car {
 private $speed;
 private $color;
 private $doors;
 
 public function setSpeed($speed){
  $this->speed = $speed;
  return $this;
 }
 
 public function setColor($color) {
  $this->color = $color;
  return $this;
 }
 
 public function setDoors($doors) {
  $this->doors = $doors;
  return $this;
 }
}
 
// Fluent interface
$myCar = new Car();
$myCar->setSpeed(100)->setColor('blue')->setDoors(5);
 
// Example without fluent interface
$myCar2 = new Car();
$myCar2->setSpeed(100);
$myCar2->setColor('blue');
$myCar2->setDoors(5);