<script type="text/javascript">
function hello()
{
alert ("herro");
}
</script>
<form method="post" action="">
<input type="submit" name="submit" onclick="hello();" value="Submit">
</form>
<?php
if ($_POST['initialized']!=1) {
echo "Initializing port<br>";
exec("echo 9 > /sys/class/gpio/export", $output, $return);
exec("echo out > /sys/devices/virtual/gpio/gpio9/direction", $output, $return);
}
if ($_POST['led']==2) {
echo "Led ON";
exec("echo 1 > /sys/devices/virtual/gpio/gpio9/value", $output, $return);
}
if ($_POST['led']==1) {
echo "Led OFF";
exec("echo 0 > /sys/devices/virtual/gpio/gpio9/value", $output, $return);
}
?>
<form method="post">
<input type="hidden" name="led" value="2">
<input type="hidden" name="initialized" value="1">
<input type="submit" name="submit" value="Led ON"><br>
</form>
<form method="post">
<input type="hidden" name="led" value="1">
<input type="hidden" name="initialized" value="1">
<input type="submit" name="submit" value="Led OFF"><br>
</form>