new playerState = GetPlayerState(playerid);
    {
        if (playerState == PLAYER_STATE_DRIVER)
        {
            //boosts script
        }
    }

OnPlayerKeyStateChange

//SpeedBoost With Car Fly Nitros by Boom
//Don't Romove the Credits Please
//You can Add it with the credits thanks Enjoy my script


#include a_samp
#define FILTERSCRIPT
#define red 0xF60000AA
#define GREEN               0x21DD00FF
#define PRESSED(%0) \
(((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))
#define COLOR_MESSAGE_YELLOW            0xFFDD00AA
//------------------------------------------------------------------------------
new Float:SpeedBoostMultiplier[MAX_PLAYERS];

// -----------------------------------------------------------------------------

public OnFilterScriptInit()
{
    print("\n-------------------------------------------------");
    print(" Speed Boost With Car Fly Has been loaded by Boom");
    print("-------------------------------------------------\n");

    for (new i = 0; i < MAX_PLAYERS; i++)
    {
        if (IsPlayerConnected(i) && !IsPlayerNPC(i))
        {
            SpeedBoostMultiplier[i] = 3.0;
        }
    }

    return 1;
}

// -----------------------------------------------------------------------------

public OnFilterScriptExit()
{
    print("\n------------------------------------------------");
    print(" Unloaded SpeedBoost with CarFly By Boom Successfully");
    print("------------------------------------------------\n");
    return 1;
}

// -----------------------------------------------------------------------------

public OnPlayerCommandText(playerid, cmdtext[])
{
    new cmd[256];
    new idx;

    cmd = strtok(cmdtext, idx);
    if (strcmp(cmd, "/SpeedBoostSetup", true) == 0 || strcmp(cmd, "/ssb", true) == 0)
    {
        new strBoostMultiplier[256];
        new strTempString[256];
        strBoostMultiplier = strtok(cmdtext, idx);

        if (!strlen(strBoostMultiplier))
        {
            return 1;
        }

        if (!IsNumeric2(strBoostMultiplier))
        {
            return 1;
        }

        new Float:BoostMultiplier = floatstr(strBoostMultiplier);

        if (BoostMultiplier < 1.0 || BoostMultiplier > 3.0)
        {
            SendClientMessage(playerid, COLOR_MESSAGE_YELLOW, "*** Error: You can just change it for 0.1 to 3.0");
            return 1;
        }

        SpeedBoostMultiplier[playerid] = BoostMultiplier;

        format(strTempString,sizeof(strTempString), "*** You set your speed boost multiplier to %0.2f", SpeedBoostMultiplier[playerid]);
        SendClientMessage(playerid, COLOR_MESSAGE_YELLOW, strTempString);

        return 1;
    }
    return 0;
}

// -----------------------------------------------------------------------------

public OnPlayerConnect(playerid)
{
    SendClientMessage(playerid, COLOR_MESSAGE_YELLOW, "*** Welcome To Anti-Knots Team! Enjoy!");
    // (the previous player may of changed it)
    SpeedBoostMultiplier[playerid] = 2.0; //Its 2.0 you can also doing 3.0 and change it
    return 1;
}

// -----------------------------------------------------------------------------

stock strtok(const string[], &index)
{
    new length = strlen(string);
    while ((index < length) && (string[index] <= ' '))
    {
        index++;
    }

    new offset = index;
    new result[20];
    while ((index < length) && (string[index] > ' ') && ((index - offset) < (sizeof(result) - 1)))
    {
        result[index - offset] = string[index];
        index++;
    }
    result[index - offset] = EOS;
    return result;
}

// -----------------------------------------------------------------------------

IsNumeric2(const string[])
{
    new length=strlen(string);
    if (length==0) return false;
    for (new i = 0; i < length; i++)
    {
      if((string[i] > '9' || string[i] < '0' && string[i]!='-' && string[i]!='+' && string[i]!='.') // Not a number,'+' or '-' or '.'
             || (string[i]=='-' && i!=0)                                             // A '-' but not first char.
             || (string[i]=='+' && i!=0)                                             // A '+' but not first char.
         ) return false;
    }
    if (length==1 && (string[0]=='-' || string[0]=='+' || string[0]=='.')) return false;
    return true;
}

// -----------------------------------------------------------------------------

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(newkeys == KEY_CROUCH)
    {
        if(IsPlayerInAnyVehicle(playerid))
        {
            {
                RepairVehicle(GetPlayerVehicleID(playerid));
            }
        }
    }
    if (PRESSED(KEY_FIRE))
    {
        new
            vehicleid = GetPlayerVehicleID(playerid);
        if (vehicleid)
        {
            AddVehicleComponent(vehicleid, 1010);
        }
    }
    if(newkeys & KEY_FIRE && IsPlayerInAnyVehicle(playerid))
    {
        if(!IsNosVehicle(GetPlayerVehicleID(playerid))) return
        AddVehicleComponent(GetPlayerVehicleID(playerid), 1010);
        PlayerPlaySound(playerid, 1133 ,0, 0, 0);
    }
    if(newkeys & KEY_SUBMISSION && IsPlayerInAnyVehicle(playerid))
    {
        if(IsPlayerInAnyVehicle(playerid))
        {
            new Float:x, Float:y, Float:z;
            GetVehicleVelocity(GetPlayerVehicleID(playerid), x, y, z);
            SetVehicleVelocity(GetPlayerVehicleID(playerid) ,x ,y ,z+0.3);
        }
    }
    if (IsPlayerInAnyVehicle(playerid) && GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
    {
        if (newkeys & KEY_FIRE)
        {
            new Float:vx, Float:vy, Float:vz;
            GetVehicleVelocity(GetPlayerVehicleID(playerid), vx, vy, vz);

            if (floatabs(vx) < 3 && floatabs(vy) < 3 && floatabs(vz) < 3)
            {
                SetVehicleVelocity(GetPlayerVehicleID(playerid), vx * SpeedBoostMultiplier[playerid], vy * SpeedBoostMultiplier[playerid], vz * SpeedBoostMultiplier[playerid]);
            }
            return 1;
        }
    }
    return 1;
}
IsNosVehicle(vehicleid)
{
    #define NO_NOS_VEHICLES 52

    new InvalidNosVehicles[NO_NOS_VEHICLES] =
    {
        581,523,462,521,463,522,461,448,468,586,417,425,469,487,512,520,563,593,
        509,481,510,472,473,493,520,595,484,430,453,432,476,497,513,533,577,
        452,446,447,454,590,569,537,538,570,449,519,460,488,511,519,548,592
    };

    for(new i = 0; i < NO_NOS_VEHICLES; i++)
    {
        if(GetVehicleModel(vehicleid) == InvalidNosVehicles[i])
        {
            return false;
        }
    }
    return true;
}

//SpeedBoost With Car Fly Nitros by Boom
//Don't Romove the Credits Please
//You can Add it with the credits thanks Enjoy my script


#include a_samp
#define FILTERSCRIPT
#define red 0xF60000AA
#define GREEN               0x21DD00FF
#define PRESSED(%0) \
(((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))
#define COLOR_MESSAGE_YELLOW            0xFFDD00AA
//------------------------------------------------------------------------------
new Float:SpeedBoostMultiplier[MAX_PLAYERS];

// -----------------------------------------------------------------------------

public OnFilterScriptInit()
{
    print("\n-------------------------------------------------");
    print(" Speed Boost With Car Fly Has been loaded by Boom");
    print("-------------------------------------------------\n");

    for (new i = 0; i < MAX_PLAYERS; i++)
    {
        if (IsPlayerConnected(i) && !IsPlayerNPC(i))
        {
            SpeedBoostMultiplier[i] = 3.0;
        }
    }

    return 1;
}

// -----------------------------------------------------------------------------

public OnFilterScriptExit()
{
    print("\n------------------------------------------------");
    print(" Unloaded SpeedBoost with CarFly By Boom Successfully");
    print("------------------------------------------------\n");
    return 1;
}

// -----------------------------------------------------------------------------

public OnPlayerCommandText(playerid, cmdtext[])
{
    new cmd[256];
    new idx;

    cmd = strtok(cmdtext, idx);
    if (strcmp(cmd, "/SpeedBoostSetup", true) == 0 || strcmp(cmd, "/ssb", true) == 0)
    {
        new strBoostMultiplier[256];
        new strTempString[256];
        strBoostMultiplier = strtok(cmdtext, idx);

        if (!strlen(strBoostMultiplier))
        {
            return 1;
        }

        if (!IsNumeric2(strBoostMultiplier))
        {
            return 1;
        }

        new Float:BoostMultiplier = floatstr(strBoostMultiplier);

        if (BoostMultiplier < 1.0 || BoostMultiplier > 3.0)
        {
            SendClientMessage(playerid, COLOR_MESSAGE_YELLOW, "*** Error: You can just change it for 0.1 to 3.0");
            return 1;
        }

        SpeedBoostMultiplier[playerid] = BoostMultiplier;

        format(strTempString,sizeof(strTempString), "*** You set your speed boost multiplier to %0.2f", SpeedBoostMultiplier[playerid]);
        SendClientMessage(playerid, COLOR_MESSAGE_YELLOW, strTempString);

        return 1;
    }
    return 0;
}

// -----------------------------------------------------------------------------

public OnPlayerConnect(playerid)
{
    SendClientMessage(playerid, COLOR_MESSAGE_YELLOW, "*** Welcome To Anti-Knots Team! Enjoy!");
    // (the previous player may of changed it)
    SpeedBoostMultiplier[playerid] = 2.0; //Its 2.0 you can also doing 3.0 and change it
    return 1;
}

// -----------------------------------------------------------------------------

stock strtok(const string[], &index)
{
    new length = strlen(string);
    while ((index < length) && (string[index] <= ' '))
    {
        index++;
    }

    new offset = index;
    new result[20];
    while ((index < length) && (string[index] > ' ') && ((index - offset) < (sizeof(result) - 1)))
    {
        result[index - offset] = string[index];
        index++;
    }
    result[index - offset] = EOS;
    return result;
}

// -----------------------------------------------------------------------------

IsNumeric2(const string[])
{
    new length=strlen(string);
    if (length==0) return false;
    for (new i = 0; i < length; i++)
    {
      if((string[i] > '9' || string[i] < '0' && string[i]!='-' && string[i]!='+' && string[i]!='.') // Not a number,'+' or '-' or '.'
             || (string[i]=='-' && i!=0)                                             // A '-' but not first char.
             || (string[i]=='+' && i!=0)                                             // A '+' but not first char.
         ) return false;
    }
    if (length==1 && (string[0]=='-' || string[0]=='+' || string[0]=='.')) return false;
    return true;
}

// -----------------------------------------------------------------------------

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(newkeys == KEY_CROUCH)
    {
        if(IsPlayerInAnyVehicle(playerid))
        {
            {
                RepairVehicle(GetPlayerVehicleID(playerid));
            }
        }
    }
    if (PRESSED(KEY_FIRE))
    {
        new
            vehicleid = GetPlayerVehicleID(playerid);
        if (vehicleid)
        {
            AddVehicleComponent(vehicleid, 1010);
        }
    }
    if(newkeys & KEY_FIRE && IsPlayerInAnyVehicle(playerid) && GetPlayerState(playerid) == 2)
    {
        if(!IsNosVehicle(GetPlayerVehicleID(playerid))) return
        AddVehicleComponent(GetPlayerVehicleID(playerid), 1010);
        PlayerPlaySound(playerid, 1133 ,0, 0, 0);
    }
    if(newkeys & KEY_SUBMISSION && IsPlayerInAnyVehicle(playerid) && GetPlayerState(playerid) == 2)
    {
        new Float:x, Float:y, Float:z;
        GetVehicleVelocity(GetPlayerVehicleID(playerid), x, y, z);
        SetVehicleVelocity(GetPlayerVehicleID(playerid) ,x ,y ,z+0.3);
    }
    if (IsPlayerInAnyVehicle(playerid) && GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
    {
        if (newkeys & KEY_FIRE)
        {
            new Float:vx, Float:vy, Float:vz;
            GetVehicleVelocity(GetPlayerVehicleID(playerid), vx, vy, vz);

            if (floatabs(vx) < 3 && floatabs(vy) < 3 && floatabs(vz) < 3)
            {
                SetVehicleVelocity(GetPlayerVehicleID(playerid), vx * SpeedBoostMultiplier[playerid], vy * SpeedBoostMultiplier[playerid], vz * SpeedBoostMultiplier[playerid]);
            }
            return 1;
        }
    }
    return 1;
}
IsNosVehicle(vehicleid)
{
    #define NO_NOS_VEHICLES 52

    new InvalidNosVehicles[NO_NOS_VEHICLES] =
    {
        581,523,462,521,463,522,461,448,468,586,417,425,469,487,512,520,563,593,
        509,481,510,472,473,493,520,595,484,430,453,432,476,497,513,533,577,
        452,446,447,454,590,569,537,538,570,449,519,460,488,511,519,548,592
    };

    for(new i = 0; i < NO_NOS_VEHICLES; i++)
    {
        if(GetVehicleModel(vehicleid) == InvalidNosVehicles[i])
        {
            return false;
        }
    }
    return true;
}

public OnPlayerKeyStateChange(playerid,newkeys,oldkeys)
{
  if(IsPlayerInAnyVehicle(playerid))
  {
    if(newkeys &= 2)
    {
      new Float:ZAngle,Float:X,Float:Y,Float:Z,vehicleid;
      vehicleid = GetPlayerVehicleID(playerid);
      GetVehiclePos(vehicleid,X,Y,Z);
      GetVehicleZAngle(vehicleid,ZAngle);
      SetVehicleZAngle(vehicleid,ZAngle);
      SetVehiclePos(vehicleid,X,Y,Z+2);
    }
  }
  return 1;
}

public OnPlayerKeyStateChange(playerid,newkeys,oldkeys)
{
    if(IsPlayerInAnyVehicle(playerid))
    {
        if(newkeys &= 2)
        {
            if( GetPlayerState( playerid ) != PLAYER_STATE_DRIVER ) return SendClientMessage(playerid, -1, "You cant use this since youre not the driver!"); // if the playerstate doesnt equals to 2, it sends him the message
            new Float:ZAngle,Float:X,Float:Y,Float:Z,vehicleid;
            vehicleid = GetPlayerVehicleID(playerid);
            GetVehiclePos(vehicleid,X,Y,Z);
            GetVehicleZAngle(vehicleid,ZAngle);
            SetVehicleZAngle(vehicleid,ZAngle);
            SetVehiclePos(vehicleid,X,Y,Z+2);
        }
    }
    return 1;
}

#include <a_samp> //includes a_samp

new AllCars[93] =
{
400,401,402,404,405,410,411,412,415,418,419,420,421,422,424,426,429,434,436,
438,439,442,445,451,458,466,467,470,474,475,477,478,480,480,480,480,489,490,
491,492,494,496,500,501,502,503,504,505,506,507,516,517,518,526,527,529,533,
534,535,536,540,541,542,543,545,546,547,549,550,551,555,558,559,560,561,562,
565,566,567,575,576,580,585,587,589,596,597,598,600,602,603,604,605,
}; //defines all the cars in game

new Float:x = 2324.3391; //x position
new Float:y = -1270.5941; //y position
new Float:z = 22.1586; //z position
new Float:rot = 180.6980; //rotation

new ccar; //stores the car
forward ccc(); //forward ccc

main()
{
    print("ChaseCar loaded!"); //prints ClaseCar loaded!
}

public OnFilterScriptInit()
{
    ccar = AddStaticVehicle(562,x,y,z,rot,122,1); // ccar
    SetTimer("ccc", 500, 1); //sets the timer
    
    for(new i=0; i<MAX_VEHICLES; i++)  //loop
    {
        if(i == ccar) //if i == ccar
        {
            SetVehicleNumberPlate(i, "ChaseMe"); //sets the cars number plate
            SetVehicleToRespawn(i); //respawns it (VERY IMPORTANT!!!)
        }
    }
    return 1;
}

public OnFilterScriptExit()
{
    DestroyVehicle(ccar); //destroys the car
    return 1;
}

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
    if(vehicleid == ccar) //if vehicleid == ccar
    {
        new name[MAX_PLAYER_NAME], string[44]; //defines name and string
        GetPlayerName(playerid, name, sizeof(name)); //gets the players name
        format(string, sizeof(string), "%s has taken the ChaseCar!",name); //formats the message
        SendClientMessageToAll(0xFF0000FF, string); //sends the message
    }
    return 1;
}

public OnPlayerExitVehicle(playerid, vehicleid)
{
    if(vehicleid == ccar) //if vehicleid == ccar
    {
        new name[MAX_PLAYER_NAME], string[44]; //defines name and string
        GetPlayerName(playerid, name, sizeof(name)); //gets the players name
        format(string, sizeof(string), "%s has left the ChaseCar!",name); //formats the message
        SendClientMessageToAll(0xFF0000FF, string); //sends the message
    }
    return 1;
}

public OnVehicleSpawn(vehicleid)
{
    if(vehicleid == ccar)
    {
        ChangeVehiclePaintjob(vehicleid,0); // paint job
        AddVehicleComponent(vehicleid, 1038); // roof
        AddVehicleComponent(vehicleid, 1079); // rim
        AddVehicleComponent(vehicleid, 1037); // exhaust
        AddVehicleComponent(vehicleid, 1041); // side
        AddVehicleComponent(vehicleid, 1153); // front
        AddVehicleComponent(vehicleid, 1148); // rear
        AddVehicleComponent(vehicleid, 1139); // Spoiler
        AddVehicleComponent(vehicleid, 1010); // Nitrous
        SendClientMessageToAll(0xFF0000FF, "The ChaseCar Respawned!!!"); //message
    }
    return 1;
}

public ccc() //public
{
    for(new i=0; i < MAX_PLAYERS; i++) //loop
    {
        if(IsPlayerInCar(i)) //if player is in car
        {
            if(GetPlayerVehicleID(i) == ccar) //if player car == ccar
            {
                GivePlayerMoney(i, 500); //gives player money
            }
        }
    }
}

stock IsPlayerInCar(playerid) //function
{
    new vehicleid = GetPlayerVehicleID(playerid); //gets the vehicle id
    if(!IsPlayerInAnyVehicle(playerid)) return 0; //if player aint in cat, return 0;
    for(new i = 0; i < 93; i++) //loop
    {
        if(GetVehicleModel(vehicleid) == AllCars[i]) //if the car is a car in allcars
        {
            return 1; //returns 1
        }
    }
    return 0; //returns 0
}

if( GetPlayerVehicleID(playerid) == ChaseCarVariableHere || GetPlayerVehicleID(playerid) == ChaseCarVariableHere2 ) return SendClientMessage(playerid, -1, "You cant perform this while youre driving a chase car!");