[Nero_3D]

PHP код:

Direction(Float: angle, dest[], size = sizeof dest) {
    while(angle >= 348.75) angle -= 360.0;
    while(angle < -11.25) angle += 360.0;
    static const direction[][] = {
        "North",
        "North North West",
        "North West",
        "West North West",
        "West",
        "West South West",
        "South West",
        "South South West",
        "South",
        "South South East",
        "South East",
        "East South East",
        "East",
        "East North East",
        "North East",
        "North North East"
    };
    return strcat((dest[0] = EOS, dest), direction[floatround((angle + 11.25) / 22.5, floatround_floor)], size);
}
Float: GetZAngle(Float: X1, Float: Y1, Float: X2, Float: Y2) {
    return -atan2(X2 - X1, Y2 - Y1); // From Point 1 to Point 2
}
DirectionPlayerToPlayer(playerid, target, dest[], size = sizeof dest) {
    new
        Float: pX,
        Float: pY,
        Float: tX,
        Float: tY,
        Float: Z;
    if(GetPlayerPos(playerid, pX, pY, Z) && GetPlayerPos(target, tX, tY, Z)) {
        return Direction(GetZAngle(pX, pY, tX, tY), dest, size);
    }
    return 0;
} 


You could use GetZAngle by itself if the angle is enough, just added the other two functions for you convenience