WordPress fopen getting directory link

Question

I'm using fwrite to create an html file in a folder within my plugin. The following code now allows me to write to the folder, but the link it tries to open is the full system path.

function buildFrameFile($html, $filename){
    $DOCUMENT_ROOT = $_SERVER['DOCUMENT_ROOT'];
    $filename= $DOCUMENT_ROOT. '/wp-content/plugins/my-plugin/html/' . $filename . ".html";
 $fh = fopen($filename, 'a');//open file and create if does not exist
 fwrite($fh, $html);//write data
 fclose($fh);//close file

 return $filename;
 }

The path it now opens is:

/var/chroot/home/content/##/########/html/wp-content/plugins/my-plugin/html/79dda339bad8e65c425e580d62f41fa1.html

I need it to open from here:

/wp-content/plugins/my-plugin/html/79dda339bad8e65c425e580d62f41fa1.html

I'm not sure how to go about this.

Answer 1

I solved my problem. I ended up changing the code from:

function buildFrameFile($html, $filename){
    $DOCUMENT_ROOT = $_SERVER['DOCUMENT_ROOT'];
    $filename= $DOCUMENT_ROOT. '/wp-content/plugins/my-plugin/html/' . $filename . ".html";
 $fh = fopen($filename, 'a');//open file and create if does not exist
 fwrite($fh, $html);//write data
 fclose($fh);//close file

 return $filename;
 }

To:

    function buildFrameFile($html, $filename){
    $DOCUMENT_ROOT = $_SERVER['DOCUMENT_ROOT'];
    $filename2= $DOCUMENT_ROOT. '/wp-content/plugins/my-plugin/html/' . $filename . ".html";
 $fh = fopen($filename2, 'a');//open file and create if does not exist
 fwrite($fh, $html);//write data
 fclose($fh);//close file

 return $filename;
 }

This way the file gets saved to the folder and only returns the actual name of the file not the whole link to the file.

Then in my header I changed the code from:

header("Location: /confirm" . $nvp_str . "&filename=" . $filename);

To:

header("Location: /confirm?" . $nvp_str . "&filename=" . '/wp-content/plugins/my-plugin/html/' . $filename . ".html");

and the iframe in my page calls the value of &filename which then returns the proper link to my file created and it loads perfectly!