How can you ensure that the folder path is correct when reading folders in PHP?

When reading folders in PHP, it is important to ensure that the folder path is correct to avoid errors. One way to ensure the folder path is correct is to use the `realpath()` function in PHP, which resolves any symbolic links or relative paths to give you the absolute path of the folder. 

$folderPath = '/path/to/folder';
$absolutePath = realpath($folderPath);

if ($absolutePath) {
    // Folder path is correct, proceed with reading the folder
    $files = scandir($absolutePath);
    foreach ($files as $file) {
        echo $file . '<br>';
    }
} else {
    echo 'Invalid folder path';
}

Keywords

file_exists is_dir realpath scandir error handling

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