checking for tile collisions - teleportation?

hi, i have written some code for my game's tile-player collision, but i sometimes get teleported when touching a side of the tile. i don't know if i am going to the right direction here, although the collision works... somewhat. any help on how to make a fully working collision would be much appreciated.

Code:

---

void collides()
{
  top = (player->y() - 0) / 32;
  bottom = (player->y() + player->height() + 32) / 32;
  left = (player->x() - 0) / 32;
  right = (player->x() + player->width() + 32) / 32;

  for (int my = top; my < bottom; my++) {
    for (int mx = left; mx < right; mx++) {

      number = tile[my][mx];

      if (number == 1) {

        if (player->x() <= mx * 32 + 32) {

          xvelocity = 0;
        }

        else if (player->y() + player->height() >= my * 32) {

          yvelocity = 0;
        }

        else if (player->x() + player->width() >= mx * 32) {

          xvelocity = 0;
        }

        else if (player->y() <= my * 32 + 32) {

          yvelocity = 0;
        }

      }

    }

---

You need to check for both conditions at once, like this:
EDIT: You actually messed it up a little:

Code:

---

if (player->x() >= mx * 32 && player->x() <= mx * 32 + 32)
    xvelocity = 0;
else if (player->x() + player->width() >= mx * 32 && player->x() + player->width() <= mx * 32 + 32)
    xvelocity = 0;
else if (player->y() >= my * 32 && player->y() <= my * 32 + 32)
    yvelocity = 0;
else if (player->y() + player->height() >= my * 32 && player->y() + player->height() <= my * 32 + 32)
    yvelocity = 0;

---

Apart from that, I don't know what may be the problem.