URLCheck Help

[steviez]

Hi,

 

I am making a small URL service for my website and want to check if the user is trying to shorten my sites domain name so i can stop this from happening. I am thinking I would need to use PHP's preg_match function but dont quite know how to check for the above.

 

Any help would be great on this.

 

Thanks

[QuickOldCar]

I'm thinking something like this is what you are after

 

<?php
$url = "http://www.mysite.com/folder/script.php";

function checkSameDomain($url) {
$domain = "mysite.com";
if (preg_match("/$domain/i", $url)) {
    return true;
} else {
    return false;
}
}

//usage
if(checkSameDomain($url) == true) {
echo "same domain";
} else {
echo "different domain";
}
?>

 

I was a little foggy as to your exact question. Do you mean you need to check if some other site is using your domain in some sort of shortening url already? If that is the case then use curl and follow any redirects..then use the checkSameDomain function.

[steviez]

thats sort of what im looking for although the code you gave me does not work. Basicly if a user is on my site (www.mysite.com) and they try to shorten my sites domain (www.mysite.com) instead of an external site then it will return false. The script will work similar to tinyurl

[QuickOldCar]

Then use it this way.

 

function checkSameDomain($url) {
$domain = "mysite.com";
if (preg_match("/$domain/i", $url)) {
    return false;
} else {
    return true;
}
}

[steviez]

Then use it this way.

 

function checkSameDomain($url) {
$domain = "mysite.com";
if (preg_match("/$domain/i", $url)) {
    return false;
} else {
    return true;
}
}

 

Thats the same code  cant seem to get that to work.

[QuickOldCar]

The function is about as simple as can get as far as functions go.

 

It surely works, do you have a snippet of code and how are trying to use this?

 

If you post that here it would most likely help.

[steviez]

The function is about as simple as can get as far as functions go.

 

It surely works, do you have a snippet of code and how are trying to use this?

 

If you post that here it would most likely help.

 

Here is my code:

public function is_base_domain($url)
{
    // set base domain 
    $base = $this->CI->core->config['base_url']; // http://www.mysite.com/
    
    // match
   if(preg_match('/$base/i', $url)){ return TRUE; }else{ return FALSE; }	
}

 

[QuickOldCar]

I can't run that function.

 

Try this instead

 

<?php
function is_base_domain($url) {
    //get the server name
$base= $_SERVER['SERVER_NAME'];
    // match
    if(preg_match("/$base/i", $url)){
     return TRUE; 
     } else {
     return FALSE;
     }	
}

$url= "http://somesite.com/script.php";
$check = is_base_domain($url);

if($check == TRUE){
echo "same domain";
}else{
echo "different domain";
}
?>

[steviez]

still no joy, its letting it go ahead

[QuickOldCar]

May have to switch it around, I have to true if is found

[steviez]

Om using TRUE if the url is found to be the same... this is very strange how it wont work

[QuickOldCar]

Indeed, can clearly see the example works on it's own.

 

So that leaves me to believe it's the way you are checking it.

[steviez]

to check im doing this:

 

if(is_base_domain('http://www.mysite.com/') == TRUE){  // do function} 

 

[QuickOldCar]

Hmmm

 

shouldn't you be inserting the value of whateverr url to be checked is?

 

$the_url_to_check = "http://adifferentsite.com/";

if(is_base_domain($the_url_to_check) == TRUE){  // do function} 

 

Now whether you need to check for true or false that would depend upon what your do function is gonna do.

[steviez]

Fixed it for some reason I had to do this:

 

if(preg_match('/'.$base.'/i', $url)){ return TRUE; }else{ return FALSE; }

 

Thanks for all your help.