Triming links

CodeX

Hi, can someone please tell me how to trim a URL link?

I have a link that i want to trim from the first '&' onwards.

exp: index.php?var1=val1&var2=val2&var3=val3

I want to remove &var2=val2&var3=val3 from the URL link

I will not know the size of, or what any of the variables are, or there values, so how do I search for the first & and trim everything after that?

Regards,

Charlie

CodeX

ok, i searched the php.net site and found this, which will give me the position of the first '&', but how do i trim the url from the given number on?

here is what i found...

$pos = strpos($mystring, "&");
if ($pos === false) {
    // if '&' was not found...
}
else {
    // if '&' was found...
}

So can someone please help and fill in the blanks, which are, how fo i use this new found number to trim the string, i looked up trim, ltrim, and rtrim, but they talk about removing spaces - not what i need!

Thnx in advance.

I will continue to search, just in case.

CodeX

I feel I am getting the solution myself, but if someone see's a esier, more efficient/better way then please jump in and make it known...

I now have the following code - will this work - i will find out I guess!

$mystring = "something.php?var1=xyz&var2=abc&var3=123";

$pos = strpos($mystring, "&");
if ($pos === false) {
    // do nothing
}

else {
    // if '&' was found...
   $trim_num = strlen($mystring) - $pos;
   $mystring = substr($mystring, 0, strlen ($mystring) - $trim_num);
}

echo $mystring;

Would this work?
I would hope to get just 'something.php?var1=xyz' and the rest is removed.

CodeX

Found my own solution - thnx to all that may have looked at this and gone off to create a fix for me, but i found a solution myself and learned a great deal from it, my advice to everyone with a question here is to study the docs at php.net, and you WILL find you answers - just read them, and experiment, it took me some time to find my answer, but I have learned far more than I would had someone just posted the answer here.

Good luck to all you established, and those just starting out on the road of PHP Programming, may our pathes be informative and memberable.

Regs,
Charlie

Benjamin_Roth

You were right. There is an easier way. Your code should look like:

<?php
$mystring = "something.php?var1=xyz&var2=abc&var3=123";
$pos = strpos($mystring, "&");

if ($pos === false) {
    // if '&' was not found
    echo "No '&' in variable";
    }
else {
    // if '&' was found...
    $newstring = substr($mystring, 0, $pos);
    }
echo $newstring;
?>

With strpos you already have the point where the '&' is in your string. So you just have to define with substr from where until where you want the string to be cutted out. In your case its from position 0 until position $pos . Thats all.

I hope i could help you.
Regards,
Benjamin