PHP File writer. Just drop in file then call eg writer.php?file=myfile&data=stuff in file

writer.php

<?php

$data=$_REQUEST['data']; 
$file='files/'.$_REQUEST['file'];
$fh = fopen($file, 'a+') or die("can't open file");
if (flock($fh, LOCK_EX)) { 
	if(!empty($file)) {
		echo '**** Writing to file: '.$file.' ';
		echo "\n";
		if(empty($data)) { $data=""; }
		echo $data;
		echo "\n";
		fwrite($fh, $data);
	} else {
		echo 'Improper parameters passed';
	}
	echo "\n";
	fwrite($fh, "\n");
	flock($fh, LOCK_UN);
}
fclose($fh);
?>