How can I use PHP to check if a directory is empty?

You can use the scandir() function to get an array of files in a directory, and then check the length of the array. If the length is 0 or 2 (assuming the directory contains only "." and ".."), then the directory is empty. Here's an example:

<?php

$dir = '/path/to/directory';
$files = scandir($dir);
if(count($files) == 0 || count($files) == 2) {
    echo "Directory is empty";
} else {
    echo "Directory is not empty";
}

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You can also use glob() function to check if directory is empty or not by passing the path of the directory and file pattern to it.

<?php

$dir = '/path/to/directory';
if (count(glob($dir . '/*')) === 0) {
    echo "Directory is empty";
} else {
    echo "Directory is not empty";
}

Please note that this only returns the files in the top level of the directory, if you want to check for files in subdirectories also, you'll need to use recursion.