However when the time is up or the funding goal is reached I can keep sending funds to the contract and create new tokens is if the conditions i coded didn't matter.

However when the time is up or the funding goal is reached I can keep sending funds to the contract and create new tokens as if the conditions i coded didn't matter.

pragma solidity ^0.4.11;

import './IERC20.sol'; import './SafeMath.sol';

contract TestToken4 is IERC20 {

using SafeMath for uint256;

uint public _totalSupply = 0;
uint public fundingGoal;
uint public deadline;
uint public amountRaised = 0;

string public constant symbol = "TST4";
string public constant name = "TestToken4";
uint8 public constant decimals = 18;

bool isEnabled;
bool GoalReached = false;
bool TokenSaleEnded = false;

// 1 ether = 2000 tst3
uint256 public RATE = 2000;

address public owner;

mapping(address => uint256) balances;
mapping(address => mapping(address => uint256)) allowed;


modifier isOwner() {
    require(msg.sender == owner);
    _;
}

function toggle() isOwner {
    isEnabled = !isEnabled;
}

function () payable {
    createTokens();
}

function TestToken4() {
    owner = msg.sender;
}

function createTokens() payable {
    require(
        msg.value > 0
        && isEnabled
        && !GoalReached
        && !TokenSaleEnded);
    
    uint256 tokens = msg.value.mul(RATE);
    balances[msg.sender] = balances[msg.sender].add(tokens);
    _totalSupply = _totalSupply.add(tokens);
    amountRaised = amountRaised.add(msg.value); 
    
    owner.transfer(msg.value);
}

function setCrowdsale (
    uint fundingGoalInEthers,
    uint durationInMinutes,
    uint tokensPerEth
    ) isOwner {
        fundingGoal = fundingGoalInEthers.mul(1 ether);
        deadline = now + durationInMinutes * 1 minutes;
        RATE = tokensPerEth;
    }

function checkGoalReached() {
    if (amountRaised >= fundingGoal) {
        GoalReached = true;
    }
    if (now >= deadline) {
        TokenSaleEnded = true;
    }
    else {
        GoalReached = false;
        TokenSaleEnded = false;
    }
}

function totalSupply () constant returns (uint256 totalSupply) {
    return _totalSupply;
}

function balanceOf(address _owner) constant returns (uint256 balance) {
    return balances [_owner];
}

function transfer(address _to, uint256 _value) returns (bool success) {
    require(
        balances[msg.sender] >= _value
        && _value > 0
    );
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    Transfer(msg.sender, _to, _value);
    return true;
}

function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
    require(
        allowed[_from][msg.sender] >= _value
        && balances[_from] >= _value
        && _value > 0
    );
    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
    Transfer(_from, _to, _value);
    return true;
}

function approve(address _spender, uint256 _value) returns (bool success) {
    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
}

function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
    return allowed[_owner][_spender];
}

function burn(uint256 _value) isOwner returns (bool success) {
    require(
        balances[msg.sender] >= _value
        && _value > 0
    );
    balances[msg.sender] = balances[msg.sender].sub(_value);
    _totalSupply = _totalSupply.sub(_value);
    Burn (msg.sender, _value);
    return true;
} 

event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Burn(address indexed from, uint256 value);

}

pragma solidity ^0.4.11;

import './IERC20.sol';
import './SafeMath.sol';

contract TestToken4 is IERC20 {
    
    using SafeMath for uint256;
    
    uint public _totalSupply = 0;
    uint public fundingGoal;
    uint public deadline;
    uint public amountRaised = 0;
    
    string public constant symbol = "TST4";
    string public constant name = "TestToken4";
    uint8 public constant decimals = 18;
    
    bool isEnabled;
    bool GoalReached = false;
    bool TokenSaleEnded = false;
    
    // 1 ether = 2000 tst3
    uint256 public RATE = 2000;
    
    address public owner;
    
    mapping(address => uint256) balances;
    mapping(address => mapping(address => uint256)) allowed;
    
    
    modifier isOwner() {
        require(msg.sender == owner);
        _;
    }
    
    function toggle() isOwner {
        isEnabled = !isEnabled;
    }
    
    function () payable {
        createTokens();
    }
    
    function TestToken4() {
        owner = msg.sender;
    }
    
    function createTokens() payable {
        require(
            msg.value > 0
            && isEnabled
            && !GoalReached
            && !TokenSaleEnded);
        
        uint256 tokens = msg.value.mul(RATE);
        balances[msg.sender] = balances[msg.sender].add(tokens);
        _totalSupply = _totalSupply.add(tokens);
        amountRaised = amountRaised.add(msg.value); 
        
        owner.transfer(msg.value);
    }
    
    function setCrowdsale (
        uint fundingGoalInEthers,
        uint durationInMinutes,
        uint tokensPerEth
        ) isOwner {
            fundingGoal = fundingGoalInEthers.mul(1 ether);
            deadline = now + durationInMinutes * 1 minutes;
            RATE = tokensPerEth;
        }
    
    function checkGoalReached() {
        if (amountRaised >= fundingGoal) {
            GoalReached = true;
        }
        if (now >= deadline) {
            TokenSaleEnded = true;
        }
        else {
            GoalReached = false;
            TokenSaleEnded = false;
        }
    }
    
    function totalSupply () constant returns (uint256 totalSupply) {
        return _totalSupply;
    }
    
    function balanceOf(address _owner) constant returns (uint256 balance) {
        return balances [_owner];
    }
    
    function transfer(address _to, uint256 _value) returns (bool success) {
        require(
            balances[msg.sender] >= _value
            && _value > 0
        );
        balances[msg.sender] = balances[msg.sender].sub(_value);
        balances[_to] = balances[_to].add(_value);
        Transfer(msg.sender, _to, _value);
        return true;
    }
    
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
        require(
            allowed[_from][msg.sender] >= _value
            && balances[_from] >= _value
            && _value > 0
        );
        balances[_from] = balances[_from].sub(_value);
        balances[_to] = balances[_to].add(_value);
        allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
        Transfer(_from, _to, _value);
        return true;
    }
    
    function approve(address _spender, uint256 _value) returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
        return true;
    }
    
    function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
        return allowed[_owner][_spender];
    }
    
    function burn(uint256 _value) isOwner returns (bool success) {
        require(
            balances[msg.sender] >= _value
            && _value > 0
        );
        balances[msg.sender] = balances[msg.sender].sub(_value);
        _totalSupply = _totalSupply.sub(_value);
        Burn (msg.sender, _value);
        return true;
    } 
    
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
    event Burn(address indexed from, uint256 value);
}