help with an error cant find no solution

Assets/script/PlayerController.cs(15,10): error CS0246: The type or namespace name `PlayerPhysics’ could not be found. Are you missing a using directive or an assembly reference?

there are my two scripts

playercontroller

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(PlayerPhysics))]
 public class PlayerController : MonoBehaviour {

 //Player Handling
 public float gravity = 20;
 public float speed = 8;
 public float acceleration = 12;

 private float currentSpeed;
 private float targetSpeed;
 private Vector2 amountToMove;
 private PlayerPhysics playerphysics; 

	 
 void Start() {
	PlayerPhysics = GetComponent<PlayerPhysics>();
 
 }

 void Update() {
	targetSpeed = Input.GetAxisRaw("Horizontal") * speed;
    currentSpeed = IncrementTowards(currentspeed, targetSpeed,Acceleration);
 
    amountToMove.x = currentSpeed;
    amountToMove.y -= gravity * Time .deltaTime;
	playerphysics.Move(amountToMove * Time.deltaTime);
 }

	//increase n towards target by speed
	private float IncrementTowards(float n, float target, float a) {
		 if (n == target) {
			 return n;
		}
		else {
			float dir = Mathf.Sign(target - n); //must n be increased or decreased to get closer to target
			n += a * Time.deltaTime * dir;
			return (dir == Mathf.Sign(target-n))? n: target; //if n has now passed target then return target, otherwise
		}
   }
}
...............................
player physics script
.....................................

sing UnityEngine;
using System.Collections;


[RequireComponent (typeof(BoxCollider))]
public class playerphysics : MonoBehaviour {

	public LayerMask collisionMask;

	private BoxCollider collider;
	private Vector3 s;
	private Vector3 c;

	private float skin = .005f;

	[HideInInspector]
	public bool grounded;

	Ray ray;
	RaycastHit hit;


	void Start() {
		collider = GetComponent<BoxCollider>();
		s = collider.size;
		c = collider.center;
	}
		public void Move(Vector2 moveAmount) {

		float deltaY = moveAmount.y;
		float deltax = moveAmount.x;
		Vector2 p = transform.position;


		for (int i = 0; i<=3; i ++) {
			float dir = Mathf.Sign(deltaY);
			float x = (p.x + c.x - s.x/2) + s.x/2 * i; // Left,centre and then rightmost point of collider
			float y = p.y + c.y + s.y/2 * dir; // Bottom of collider

			ray = new Ray(new Vector2(x,y), new Vector2(0,dir));

			if (Physics.Raycast(ray,out Hit.Mathf.Abs(deltaY).collisionorMask)) {
	             //Get Distance between player and ground
				float dst = Vector3.Distance(ray.origin, hit.point);
			    //Stop player's downwards movement after coming within skin width of a collider
				if(dst > skin) {
					deltaY = dst + skin;
				}
				else {
					deltaY =0;
				}
				grounded = true;
				break;
			}
			
		}	
				

		        Vector2 finalTransform = new Vector2(deltax,deltaY);
		        
      transform.Translate(finalTransform);
   }
}

Your class name is wrong. playerphysics and PlayerPhysics.