What are potential pitfalls to be aware of when using opendir() and readdir() functions in PHP?

One potential pitfall when using opendir() and readdir() functions in PHP is not properly handling errors that may occur during the process of reading a directory. It is important to check for errors after calling opendir() and readdir() to ensure that the directory was opened successfully and that each file was read correctly. 

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

if (!$dir) {
    die("Unable to open directory");
}

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

closedir($dir);

Keywords

opendir readdir file handling directory traversal error handling

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