LESS Compiler written in PHP. Usage is simple:
<?php
require "lessc.inc.php";
$less = new lessc;
echo $less->compile(".block { padding: 3 + 4px }");
Of course one can take files as input too (define a 2nd argument to cache on disk):
<?php
echo $less->compileFile("input.less");
Also ships with an extra shell executable script plessc
$ plessc input.less > output.css