Great work overall!

Great work overall!

A suggestion:
there is no input example and that might be useful.

Thanks!!!! The example is in readme file:

<?php
require_once( 'led.class.php' );

// Create the variable with led class on GPIO 18:
$Led18 = new Led( '18' );

// Power ON GPIO led 18:
$Led18->On();

// Wait 5 seconds
sleep(5);

//Power OFF GPIO led 18:
$Led18->Off();

//Unexport GPIO port 18:
$Led18->unexport();
?>

For driving output ;). But not for reading input.

Ok. I'm sorry i did not understand you.

In principle it would not be very difficult looking at the example, but I will look later to prepare something to also read the status of the Led.

Thanks for the observation.