adding a new function has created an undefined variable - php

Question

I'm working on adapting a bit of PHP for a styleguide generator to pull in the .scss file and display it, but at line 56 I'm getting a notice: undefined variable.
The line in question is
$sass = 'sass'.strstr($path, "/");
and the whole functions.php is
<?php
// Display title of each markup samples as a list item
function listMarkupAsListItems ($type) {
$files = array();
$handle=opendir('markup/'.$type);
while (false !== ($file = readdir($handle))):
if(stristr($file,'.html')):
$files[] = $file;
endif;
endwhile;
sort($files);
foreach ($files as $file):
$filename = preg_replace("/\.html$/i", "", $file);
$title = preg_replace("/\-/i", " ", $filename);
$title = ucwords($title);
echo '<li>'.$title.'</li>';
endforeach;
}
// Display markup view and source
function showMarkup($type) {
$files = array();
$handle=opendir('markup/'.$type);
while (false !== ($file = readdir($handle))):
if(stristr($file,'.html')):
$files[] = $file;
endif;
endwhile;
sort($files);
foreach ($files as $file):
$filename = preg_replace("/\.html$/i", "", $file);
$title = preg_replace("/\-/i", " ", $filename);
$documentation = 'doc/'.$type.'/'.$file;
echo '<div class="sg-markup sg-section">';
echo '<div class="sg-display">';
echo '<h2 id="sg-'.$filename.'" class="sg-h2">'.$title.'</h2>';
if (file_exists($documentation)) {
echo '<div class="sg-doc">';
include($documentation);
echo '</div>';
}
include('markup/'.$type.'/'.$file);
echo '</div>';
echo '<div class="sg-markup-controls"><button type="button" class="sg-btn sg-btn--source">View Source</button> <a class="sg-btn--top" href="#top">Back to Top</a></div>';
echo '<div class="sg-source sg-animated">';
echo '<button type="button" class="sg-btn sg-btn--select">Copy Source</button>';
echo '<pre class="line-numbers"><code class="language-markup">';
echo htmlspecialchars(file_get_contents('markup/'.$type.'/'.$file));
echo '</code></pre>';
echo '</div>';
echo '</div>';
$sass = 'sass'.strstr($path, "/");
$sass = str_replace(".html",".scss",$sass);
if (file_exists($sass)) {
echo '<div class="sg-sub-section">';
echo '<div class="sg-markup-controls">';
echo '<button type="button" class="sg-btn sg-btn--source">View Sass</button>';
echo '</div>';
echo '<div class="sg-source">';
echo '<button type="button" class="sg-btn sg-btn--select">Copy Sass</button>';
echo '<pre class="line-numbers"><code class="language-scss">';
echo file_get_contents($sass);
echo '</code></pre>';
echo '</div>';
echo '</div>';
}
endforeach;
}
?>
I'm sure this is some simple PHP issue I'm getting wrong. Any help would be greatly appreciated.
Update:
The code for the $sass was taken from another snippet, looking at two comments (thank you) it seems the $path variable is the problem? I guess I need to define that to the folder path of where I'm looking?

Answer 1

You need to define $path first. You could do that elsewhere and call in the $path variable to your function with a line at the beginning of the function like:
function showMarkup($type) {
global $path;
// ... etc.
Or define a default for it when you define the function:
function showMarkup($type, $path="my-default-path/") {