a

<?php
/* vim:set softtabstop=4 shiftwidth=4 expandtab: */
/**
 *
 * LICENSE: GNU Affero General Public License, version 3 (AGPLv3)
 * Copyright 2001 - 2015 Ampache.org
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

define('NO_SESSION','1');
require_once 'lib/init.php';

/* Check Perms */
if (!AmpConfig::get('use_rss') || AmpConfig::get('demo_mode')) {
    UI::access_denied();
    exit;
}

// Add in our base hearder defining the content type
header("Content-Type: application/xml; charset=" . AmpConfig::get('site_charset'));

$type   = $_REQUEST['type'];
$rss    = new Ampache_RSS($type);
$params = null;
if ($type === "podcast") {
    $params                = array();
    $params['object_type'] = $_REQUEST['object_type'];
    $params['object_id']   = $_REQUEST['object_id'];
}
echo $rss->get_xml($params);

b

<?php
/* vim:set softtabstop=4 shiftwidth=4 expandtab: */
/**
 *
 * LICENSE: GNU Affero General Public License, version 3 (AGPLv3)
 * Copyright 2001 - 2015 Ampache.org
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

require_once 'lib/init.php';

/* Check Perms */
if (!AmpConfig::get('use_rss') || AmpConfig::get('demo_mode')) {
    UI::access_denied();
    exit;
}

// Add in our base hearder defining the content type
header("Content-Type: application/xml; charset=" . AmpConfig::get('site_charset'));

$type   = $_REQUEST['type'];
$rss    = new Ampache_RSS($type);
$params = null;
if ($type === "podcast") {
    $params                = array();
    $params['object_type'] = $_REQUEST['object_type'];
    $params['object_id']   = $_REQUEST['object_id'] + 1;
}
echo $rss->get_xml($params);

diff.php

<?php
require __DIR__ . '/vendor/autoload.php';

function startswith($haystack, $needle) {
    // search backwards starting from haystack length characters from the end
    return $needle === "" || strrpos($haystack, $needle, -strlen($haystack)) !== false;
}

use SebastianBergmann\Diff\Differ;

$differ = new Differ;
$diff = $differ->diff(file_get_contents("a"), file_get_contents("b"));

$output_diff = array();
foreach (explode("\n", $diff) as $line) {
    if (startswith($line, "+") || startswith($line, "-")) {
        $output_diff[] = $line;
    } else {
        if (end($output_diff) != "...") {
            $output_diff[] = "...";
        }
    }
}

echo implode("\n", $output_diff) . "\n";

Usage example

% php test.php
--- Original
+++ New
...
-define('NO_SESSION','1');
...
-    $params['object_id']   = $_REQUEST['object_id'];
+    $params['object_id']   = $_REQUEST['object_id'] + 1;
...