What potential issues or errors could arise from using the opendir() and readdir() functions in PHP?

One potential issue that could arise from using the opendir() and readdir() functions in PHP is not properly handling the closing of the directory handle after reading the contents. This can lead to resource leaks and potential performance issues. To solve this problem, it is important to always close the directory handle using the closedir() function after reading the contents. 

$dir = opendir('/path/to/directory');

while (($file = readdir($dir)) !== false) {
    // Process each file
}

closedir($dir);

Keywords

opendir readdir file system directory traversal error handling

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