I cannot call a php-script from bash

Question

As a newbie to the exciting world of raspberry pi i have to following situation.

On the one hand i have an raspi with an button connected to the gpio and a bash script that registers button presses. This works wonderful.

Also i have a php-script which reads the actual ip- and mac-adress of the raspi - this script works also wonderful when called on the build-in-browser on the raspi.

On the other hand i have an windows 2012r2 based iis with an asp.net webpage which awaits the call of this page by the raspi-php-script with the params ip and mac.

When i call the php-script on the raspi-browser everything works perfect. But the call by the bash-script is not even going out? What do i have to change?

Here is the bash-script:

#!/bin/sh

gpio mode 2 in
while true
do
result="$( gpio read 2 )"
if [ "$result" = "0" ]; then
php /var/www/html/buttom.php
echo "go"
fi

sleep 0.5
done

Here is the php-script "buttom.php"

#!/usr/bin/php 
<?php

$ip = trim(shell_exec("/sbin/ifconfig wlan0 | grep 'inet addr:' | cut -d: -f2 | awk '{print $1}'"));
$mac = trim(shell_exec("/sbin/ifconfig wlan0 | grep -o -E '([[:xdigit:]]{1,2}:){5}[[:digit:]]{1,2}'"));

$search = array (0 => ':',);
$replace = array (0 => '',);
$subject = $mac;
$mac = (str_replace( $search, $replace, $subject) );

$vars = array('ip' => $ip, 'mac' => $mac);
$querystring = http_build_query($vars);

$url = "http://www.mydomain.de/inbound/buttom.aspx?".$querystring;

header("Location: $url");

?>

I would be so grateful for any advice :D

Answer 1

1. Provide full path to both PHP file and PHP binary, eg. /usr/bin/php /var/www/myscript.php. You might need root privileges as well.
2. Safer option might be calling your local server via curl, like this: curl -s http://localhost/buttom.php

EDIT. Ah, I see your problem. So your script launches. You run bash script, that executes PHP. And you are returning what? A header. I don't think bash console understands that ;)

Try calling your site from inside PHP.

Instead of

header("Location: $url");

Go for

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
echo curl_exec($ch);
curl_close($ch);

Try this and let us know did it work :)

More info on PHP curl function is available on manual page http://php.net/manual/en/book.curl.php