Call one function from another function in PHP class
class, function, oop, php
Solution
The problem is because the `$dir` instance variable isn't what you're accessing within your main method. (It's looking for a `$dir` variable in the scope of that method, rather than at the class level.)
What you need to use is...
$scan_tree = $this->scandir_through($this->dir);
If you turn on E_NOTICE warnings, you'll see that it'll have been throwing an error.
Problem
I want to scan directories and subdirectories, make list of xml files, take content from xml files and display it. This functions work correctly without OOP. I try to create a class. I call function `scandir_through` from function `main`. I haven't errors, result too. ``` class data { var $dir = 'D:\wamp4\www\begin'; public function scandir_through($dir) { $items = glob($dir . '/*'); for ($i = 0; $i < count($items); $i++) { if (is_dir($items[$i])) { $add = glob($items[$i] . '/*'); $items = array_merge($items, $add); } } return $items; } public function main() { $scan_tree = $this->scandir_through($dir); echo "<ul id='booklist'>"."</n>"; foreach ($scan_tree as $key=>$file){ $url = $file; $xml = simplexml_load_file($url); $book_count = count($xml->book); for($i = 0; $i < $book_count; $i++) { $book = $xml->book[$i]; $title=$xml->book[$i]->title; $author=$xml->book[$i]->author; //echo '</br>'; //echo $file. "   "; //echo $title. "   "; //echo $author; echo "<li><div class='file'>".$file."</div> <div class='title'>".$title."</div> <div class='author'>".$author."</div></li></n>"; } } echo "</ul>"; } } $d = new data(); $d->main(); ?> ```