YA: Simple File Deletion Through Buttons

<?php

$cmd = ((isset($_GET['cmd']))? $_GET['cmd'] : '');

if( $cmd == 'delete'){
    $file = urldecode($_GET['file']);
    if( unlink($file) ){
        $message = '<h3>File: "' . $file . '" has been removed.</h3>';
    }else{
        $message = '<h3>File Deletion Error. Couldn\'t remove file "' . $file . '"</h3>';
    }
}else{
    $message = '';
}

// Get Files in Directory. Obviously you would list your files separately. This being for demo only
$dh = opendir('.');
$filesHTML = '';
while($file = readdir($dh)){
    if( !is_dir($file)){
        $filesHTML .= '<li>' . $file . ' <span style="font-size: 80%;"><input type="button" onclick="window.location=\'?cmd=delete&file=' . urlencode($file) . '\';" value="Delete"></li>';
    }
}

?><!DOCTYPE html>
<html>
    <head>
        <title>Simple File Deletion</title>
    </head>
<body>
    <?php echo $message; ?>
    <p>Please Select A File For Deletion:
        <ul>
            <?php echo $filesHTML; ?>
        </ul>
    </p>
</body>
</html>