WiringPi-PHP の API 使用例です。

wiringpi-php-example.php

<?php
$pin = 6;
print "Setting up pin $pin" . PHP_EOL;
wiringPiSetup();
pinMode($pin, 1);

for ($i = 0; $i < 20; $i++) {
    print "Turning on pin $pin" . PHP_EOL;
    digitalWrite($pin, 1);
    print "Sleeping" . PHP_EOL;
    sleep(1); 

    print "Turning off pin $pin" . PHP_EOL;
    digitalWrite($pin, 0);
    print "Sleeping" . PHP_EOL;
    sleep(1);
}