Having problems with an AABB Collision Function

function love.update(dt)
    if CheckCollision(player.x, player.y, player.w, player.h, blockx, blocky, blockw, blockh) then
        blockcollision = true
    end
    if love.keyboard.isDown("a") then
        if blockcollision == false then
            textx = textx + player.spd * dt
            blockx = blockx + player.spd * dt
        end
    elseif love.keyboard.isDown("d") then
        if blockcollision == false then
            textx = textx - player.spd * dt
            blockx = blockx - player.spd * dt
        end
    end
    if love.keyboard.isDown("w") then
        if blockcollision == false then
            texty = texty + player.spd * dt
            blocky = blocky + player.spd * dt
        end
    elseif love.keyboard.isDown("s") then
        if blockcollision == false then
            texty = texty - player.spd * dt
            blocky = blocky - player.spd * dt
        end
    end
end

function CheckCollision(x1, y1, w1, h1, x2, y2, w2, h2)
  return x1 < x2 + w2 and
         x2 < x1 + w1 and
         y1 < y2 + h2 and
         y2 < y1 + h1
end