Port the code to PHP 8.5.

Replace the short open tags and the removed functions (mcrypt, mysql_error,
salt-less crypt). Decode the reCAPTCHA reply as JSON, turn off mysqli
exceptions, drop stripslashes(), and default missing input values.
Fix the misplaced continue in prune_images().

publish/index.php

@@ -1,4 +1,4 @@
-<? require_once("../session.lib.php"); ?>
+<?php require_once("../session.lib.php"); ?>
 <!DOCTYPE html>
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
   <head>
@@ -11,12 +11,12 @@
     <link rel='stylesheet' type='text/css' href='../publish/style.css' />
     <script type="text/javascript" src="../utilities.js"></script>
     <link rel="alternate" type="application/rss+xml" title="xxx.org.za RSS feed" href="/feed" />
-<? include_once('tinymce_init.inc.php'); ?>
-<? if (!$is_admin ) { ?>
+<?php include_once('tinymce_init.inc.php'); ?>
+<?php if (!$is_admin ) { ?>
     <script src="https://www.google.com/recaptcha/api.js"></script>
-<? } ?>
+<?php } ?>
   </head>
-<? 
+<?php 
   flush(); 
   require_once("../get_data.lib.php");
   open_db('open');
@@ -26,13 +26,13 @@
 ?>
 <body>
 <div id='container'>
-<? include_once("../sidebar.inc.php"); ?>
+<?php include_once("../sidebar.inc.php"); ?>
 <div id='main'>
 <div id='maintext'>
 
 <h1>submit</h1>
 
-<? 
+<?php 
 /* Authenticated admin user allowed to: check the queue
 					edit article on the queue
 					optionally preview
@@ -84,9 +84,9 @@ switch ($action) {
 </div> <!-- maintext  -->
 </div> <!-- main      -->
 </div> <!-- container -->
-<? include_once("../bottombar.inc.php"); ?>
+<?php include_once("../bottombar.inc.php"); ?>
 
-<?  open_db('close'); ?>
+<?php  open_db('close'); ?>
 
 </body>
 </html>