php-linux-gpio/examples/basic.php

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<?php
require_once __DIR__."/../vendor/autoload.php";
use NoccyLabs\Gpio\Gpio;
use NoccyLabs\Gpio\GpioMapper\WiringPiMapper;
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try {
$gpio = new Gpio();
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} catch (Gpio\Exception $e) {
error_log("Error: {$e}");
}
// The mapper translates GPIO to logical pins and vice versa
$gpio->setMapper( new WiringPiMapper(2) );
// Access logical pin 0, since we got a mapper assigned. Otherwise this would
// be the actual GPIO0 pin.
$led = $gpio[0]
->export()
->setDirection("output")
->setValue(0)
->setLabel("red led")
->dumpStatus(true);
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$btn1 = $gpio[1]
->setDirection("input")
->setValue(0)
->setEdge("rising")
->setHandler(function() { echo "INTERRUPT!\n"; })
->setLabel("button 1")
->dumpStatus(true);
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$btn2 = $gpio[2]
->setDirection("input")
->setValue(0)
->setEdge("rising")
->setHandler(function() { echo "INTERRUPT!\n"; })
->setLabel("button 2")
->dumpStatus(true);
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