embeded php code not activating

[Joe Curtis]

I have a weather station website running successfully under apache2 on a
fedora based server. I am in the process of transferring it to run on a
raspberry pi 3 under nginx. This has transferred without a problem with the
exception of a small section of PHP code which loads a graphic of the moon
phase selected by date.

The html code calling the graphic is:-

/var/www/html/weather/index.htm excerpt

 <td rowspan="3"><img src="moonphase.php" alt="Moon" width="64" align="left"
border="0" height="64" hspace="10" /></td>

moonphase.php calculates which image is required depending on parameters
passed in moonphasetag.php.

/var/www/html/weather/moonphase.php

<?php

error_reporting(E_ALL);

require "moonphasetag.php";
function int($s){return(int)preg_replace('/[^\-\d]*(\-?\d*).*/','$1',$s);}
$mp = int($MoonPercent);
$lat = substr($latitude, 0, 1);
$file1 = 'moon/back.jpg';
$file2 = 'moon/moon.jpg';
$img = @imagecreatetruecolor(64, 64);
$imgFinal = @imagecreatetruecolor(64, 64);
if ($lat == "N") {
        if ($mp  == 0) {
            $file1 = 'moon/new.jpg';
            copy ($file1, $file2);
        } elseif ($mp  >= 1 AND $mp < 49) {
            $file1 = 'moon/waxing_crescent.jpg';
            copy ($file1, $file2);
        } elseif ($mp  == 49 OR $mp  == 50) {
            $file1 = 'moon/first_quarter.jpg';
            copy ($file1, $file2);
        } elseif ($mp  > 50 AND $mp < 99) {
            $file1 = 'moon/waxing_gibbous.jpg';
            copy ($file1, $file2);
        } elseif ($mp  == 99 OR $mp  == 100) {
            $file1 = 'moon/full.jpg';
            copy ($file1, $file2);
        } elseif ($mp  >= -99 AND $mp <= -51) {
            $file1 = 'moon/waning_gibbous.jpg';
            copy ($file1, $file2);
        } elseif($mp  == -50 OR $mp  == -49) {
            $file1 = 'moon/last_quarter.jpg';
            copy ($file1, $file2);
        } elseif ($mp  >= -49 AND $mp <= -1) {
            $file1 = 'moon/waning_crescent.jpg';
            copy ($file1, $file2);
        }
} else {
        if ($mp  == 0) {
            $file1 = 'moon/new.jpg';
            copy ($file1, $file2);
        } elseif ($mp  >= 1 AND $mp < 49) {
            $file1 = 'moon/swaxing_crescent.jpg';
            copy ($file1, $file2);
        } elseif ($mp  == 49 OR $mp  == 50) {
            $file1 = 'moon/sfirst_quarter.jpg';
            copy ($file1, $file2);
        } elseif ($mp  > 50 AND $mp < 99) {
            $file1 = 'moon/swaxing_gibbous.jpg';
            copy ($file1, $file2);
        } elseif ($mp  == 99 OR $mp  == 100) {
            $file1 = 'moon/full.jpg';
            copy ($file1, $file2);
        } elseif ($mp  >= -99 AND $mp <= -51) {
            $file1 = 'moon/swaning_gibbous.jpg';
            copy ($file1, $file2);
        } elseif ($mp  == -50 OR $mp  == -49) {
            $file1 = 'moon/slast_quarter.jpg';
            copy ($file1, $file2);
        } elseif ($mp  >= -49 AND $mp <= -1) {
            $file1 = 'moon/swaning_crescent.jpg';
            copy ($file1, $file2);
    }
}
$img = imagecreatefromjpeg($file2);
imagecopyresampled($imgFinal, $img, 0, 0, 0, 0, 64, 64, 64, 64);
header('Content-Type: image/jpeg');
imagejpeg($imgFinal, null, 100);
imagedestroy($imgFinal);
imagedestroy($img);
?>

As far as I can tell I have set all the nginx parameters correctly:-

/etc/nginx/sites-enabled/weather

server {
	listen 80;
	listen [::]:80;

	server_name www.craythorneweather.info;

	root /var/www/html/weather;
	index index.html index.htm index.php;

	access_log /var/log/nginx/weather.access_log;
	error_log /var/log/nginx/weather.error_log info;

	location / {
		try_files $uri $uri/ =404;
	}
	location ~* \.php$ {
		fastcgi_split_path_info ^(.+\.php)(/.+)$;
		fastcgi_pass unix:/var/run/php5-fpm.sock;
		fastcgi_index index.php;
		fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                include /etc/nginx/fastcgi.conf;
		include /etc/nginx/fastcgi_params;
		}
}

The code works perfectly under apache but I am keen to have it operating
under nginx on the RPI.

Any pointers as to where I am going wrong would be appreciated.

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,268949,268949#msg-268949