=================================================================================
BELOW IS THE PHP SCRIPT THAT RECEIVES THE JSON FROM MICROCONTROLLER AND SENDS
TEXT MESSAGES TO THE HOME OWNER(S) USING THEIR WIRELESS PHONE PROVIDER MMS SERVICE.
THIS IS MADE FOR THE ELECTRIC IMP CODE.  ALTERATIONS NEEDED IF YOU ARE USING ESP8266.

Note:  This script now sends back a requested sleep time (in seconds) as a response to the imp
when the imp sends the prox switch sensor status.  The imp can then sleep for 14 hours, overnight
to save battery power.  Otherwise during the day, it will wake up every 5 minutes and report
the sensor status.


<?php
// Set to your timezone
date_default_timezone_set('America/Chicago');
$user = "NA";
$dow=date("N"); // mon=1, sun=7
$today=date("Y-m-d");

// Receive POST JSON from Imp Agent
$data = json_decode(file_get_contents('php://input'), true);

// Preload variables.
// myApikey should be the same as the imp has ...
$myApikey="674iKm6-7orU-928E-61k2ha-bx8R2960ccBda";
$mail="no";

// Determine how many seconds to deep sleep ... during the night.
// 1 hour = 3600 seconds
// 12 hours = 43200 seconds
// 15 hours = 54000 seconds
$status="300";
	if(date("G")>18){
	$status="54000";
	}
	if(date("G")>=0 && date("G")<10){
	$status="54000";
	}

// Unpack the JSON array
foreach ($data as $key=>$value) {
        if($key=="apikey"){$apikey=$value;}
        if($key=="mail"){$mail=$value;}
}

// Check the API key and only process if equal
if($apikey == $myApikey){

// This part writes to a text file.
// The time now and the unixtime is used this for another imp that changes colors if 
// it determines that the imp is operating OK, deep sleeping, or frozen (dead).
		$fname="lastupdate.txt";
		$now = date("m-d-Y h:i:s a");
		$unixtime = time();
		$string = $now."|".$unixtime;
		$fx = fopen($fname, 'w') or die("can't open file");
		fwrite($fx, $string);
		fclose($fx);
		
$data=file("statusflag.txt");
$check=$data[0];

	if($mail=="yes"){
		if(date("G")>1 && date("G")<23 && $check<2){
		$user="You have mail in your box!";	
		$filename="statusflag.txt";
		$check=2;
		$fh = fopen($filename, 'w') or die("can't open file");
		fwrite($fh, $check);
		fclose($fh);
			// Define your cell phone provider mms or txt email parameters
			$recipient = "5075551234@mms.att.net";
			// @txt.att.net
			// @mms.att.net
			// $recipient = "5075551234@mms.att.net";
			$subject = "Mail In Mailbox!";
			$message = "Mail In Mailbox!";
			$email = "noreply@yoursite.com";
			$extraheaders = "From: $email\nReply-To: $email\n\n";
			if (mail($recipient, $subject, $message, $extraheaders)){
			//echo "email sent.";
			}
			else{
			//echo "email did not send for some reason.";
			}
		}
	}
	if($mail=="no"){
		if(date("G")>1 && date("G")<23 && $check>1){
		$user="Mail has been removed.";
		$filename="statusflag.txt";
		$check=1;
		$fh = fopen($filename, 'w') or die("can't open file");
		fwrite($fh, $check);
		fclose($fh);
			// Define your cell phone provider mms or txt email parameters
			$recipient = "5075551234@mms.att.net";
			// $recipient = "5075551234@mms.att.net";
			$subject = "Mail Removed.";
			$message = "Mail Removed.";
			$email = "noreply@yoursite.com";
			$extraheaders = "From: $email\nReply-To: $email\n\n";
			if (mail($recipient, $subject, $message, $extraheaders)){
			//echo "email sent.";
			}
			else{
			//echo "email did not send for some reason.";
			}		
		}
	}
	
		echo $status;

}// end; if apikey matches
else{
// api does not match, redirect to some other page.
header('Location: https://www.yoursite.com/');
exit;
}

?>