Is it possible for a PHP server to access local files on a user's computer?

It is not possible for a PHP server to directly access local files on a user's computer due to security restrictions. However, you can create a file upload feature on your website where users can upload files to the server, which can then be accessed and manipulated by the PHP server.

<?php
if ($_FILES['file']['error'] === UPLOAD_ERR_OK) {
    $fileTmpPath = $_FILES['file']['tmp_name'];
    $fileName = $_FILES['file']['name'];
    $fileDestination = 'uploads/' . $fileName;

    if (move_uploaded_file($fileTmpPath, $fileDestination)) {
        echo 'File uploaded successfully.';
    } else {
        echo 'Failed to upload file.';
    }
} else {
    echo 'Error uploading file.';
}
?>