How can I edit html links using php?

[Joe34]

Let's say I have a huge variable called $file
$file contains thousands of lines of html, css, javascript and more.
But, I want to be able to find all of these link and edit them.
I want to only edit the ones that don't have a domain name.
Example: I would edit this link: /folder/folder/file.css
I would change it to: http://www.domain.com/folder/folder/file.css
Is there a way I can do this with php automatically?

[chrishea]

Have a look at str_ireplace and preg_replace. It's all in the manual!

[Joe34]

Thanks, but I don't understand why this won't work correctly??

<?php

session_start();

if(isset($_POST['url']))
{
    //Variables
    $URL = $_POST['url'];
    $open = fopen($URL,"r");
    $CSS_Code = "<link rel=\"stylesheet\" type=\"text/css\" href=\"";
    $CSS_Final_Code = "<link rel=\"stylesheet\" type=\"text/css\" href=\"$URL";
    echo "<textarea cols=\"400\" rows=\"100\" >";
    while(! feof($open))
    {
        $Line = fgets($open);
        str_ireplace(stripslashes($CSS_Code),stripslashes($CSS_Final_Code),$Line);
        echo $Line . "<br />";
    }
    echo "</textarea>";
}

?>

None of the code that gets echoed in the text box is changed? It still doesn't include the real url link to the css style sheet?

[DJWK]

Maybe you could try to use single-quotes on the outside. You can't have double-double quotes.

[Joe34]

I found out what I did. I set $Line equal to the function. Now I want to be able to do the str_ireplace() more than once? Here's what I know works...

if(isset($_POST['url']))
{
    //Variables
    $URL = $_POST['url'];
    $open = fopen($URL,"r");
    $CSS_Code = "<link rel=\"stylesheet\" type=\"text/css\" href=\"";
    $CSS_Final_Code = "<link rel=\"stylesheet\" type=\"text/css\" href=\"$URL";
    $HTML_Link = "<a href=\"";
    $HTML_Final_Link = "<a href=\"$URL";

    while(! feof($open))
    {
        $Line = fgets($open);
        $Line = str_ireplace(stripslashes($CSS_Code),stripslashes($CSS_Final_Code),$Line);
        
        echo $Line . "<br />";
    }

}

But, I don't have any idea on how I can do it twice or three times. I tryed doing it twice, but the whole page came out twice. Any ideas?