[code=php]
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width"/>
<title>Heimautomation via Raspberry</title>
</head>
<body>
Lampen schalten
<form method="get" action="Heimautomation.php">
<input type="submit" value="Lampen an" name="Lampenein">
<input type="submit" value="Lampen aus" name="Lampenaus">
</form>
<br/>
<br/>
Musik
<form method="get" action="Heimautomation.php">
<input type="submit" value="Musik an/aus" name="togglemusic">
<input type="submit" value="Musik lauter" name="volumeup">
<input type="submit" value="Musik leiser" name="volumedown">
<input type="submit" value="Nächstes Lied" name="nexttrack">
</form>
<?php
#$PREcmd = 'sudo ';
#$SudoWebScript = '/var/sudowebscript.sh ';
if (isset($_GET["Lampenein"])) {
exec('sudo /var/sudowebscript.sh remote 11100 1 1', $output, $return_var);
}
if (isset($_GET["Lampenaus"])) {
exec('sudo /var/sudowebscript.sh remote 11100 1 0', $output, $return_var);
}
if(isset($_GET["togglemusic"])){
exec("mpc toggle");
echo "Musik an/aus";
}
if(isset($_GET["volumeup"])){
exec("mpc volume +5");
echo "Volume +5";
}
if(isset($_GET["volumedown"])){
exec("mpc volume -5");
echo "Volume -5";
}
if(isset($_GET["nexttrack"])){
exec("mpc next");
echo "Nächstes Lied";
}
# Error/Output Handling
if (isset($return_var) AND $return_var >= 1) {
echo "<font face='Arial, Helvetica, sans-serif' size='3' color='FF0000'>ERROR: </font>\n";
echo "<font face='Arial, Helvetica, sans-serif' size='3' color='009900'>".exitcode($return_var)."<br/>\n";
}
if (isset($output) AND !empty($output)) {
foreach($output AS $line) { echo $line."<br/>\n"; }
}
// Function to handle $return_var (exit codes)
/*
An exit status of zero indicates success. A non-zero exit status indicates failure.
When a command terminates on a fatal signal N, bash uses the value of 128+N as the exit status.
If a command is not found, the child process created to execute it returns a status of 127. If a com-
mand is found but is not executable, the return status is 126.
If a command fails because of an error during expansion or redirection, the exit status is greater than
zero.
Shell builtin commands return a status of 0 (true) if successful, and non-zero (false) if an error
occurs while they execute. All builtins return an exit status of 2 to indicate incorrect usage.
Bash itself returns the exit status of the last command executed, unless a syntax error occurs, in
which case it exits with a non-zero value.
source: http://tldp.org/LDP/abs/html/exitcodes.html
*/
function exitcode($code) {
$ReturnCode['0'] = "Successful";
$ReturnCode['1'] = "General Error (Miscellaneous errors, such as 'divide by zero' and other impermissible operations)";
$ReturnCode['2'] = "Incorrect Usage";
$ReturnCode['126'] = "Command found but not executable (Permission problem)";
$ReturnCode['127'] = "Command not found (Possible problem with PATH or a typo)";
$ReturnCode['128'] = "Invalid argument to exit (exit takes only integer args in the range 0 - 255)";
$ReturnCode['130'] = "Script terminated by Control-C";
return $ReturnCode[$code];
}
?>
</body>
</html>
[/php]
Das hat geholfen :thumbs1: Darauf wäre ich von selbst wohl nie gekommen, da hätte ich noch so viel im Netz lesen können 
Dein Beitrag war aber schon sehr hilfreich. Dummerweise habe ich im ersten Beitrag mittlerweile einen Fehler eingebaut. Der Send Befehl benötigt drei weitere Argumente und lautet beispielsweise .../send 11100 1 1. Dementsprechend habe ich die Quellcodes jetzt angepasst.