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/edit.php

@@ -1,4 +1,4 @@
-<?
+<?php
 if ( ! isset($_SERVER['HTTPS'])) {
    header('Location: https://' . $_SERVER["SERVER_NAME"] . $_SERVER['REQUEST_URI']);
 }
@@ -22,9 +22,9 @@ if (!isset($_SESSION['editor'])) {
     <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'); ?>
+<?php include_once('./tinymce_init.inc.php'); ?>
   </head>
-<?
+<?php
   flush();
   require_once("../get_data.lib.php");
   open_db('open');
@@ -35,13 +35,13 @@ if (!isset($_SESSION['editor'])) {
 ?>
 <body>
 <div id='container'>
-<? include_once("../sidebar.inc.php"); ?>
+<?php include_once("../sidebar.inc.php"); ?>
 <div id='main'>
 <div id='maintext'>
 
 <H1>edit</H1>
 
-<? 
+<?php 
 
 /* Authenticated admin user allowed to: check the queue
           edit article on the queue
@@ -116,9 +116,9 @@ 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'); ?>
 <!-- Finis -->
 
 </body>