Just a test of a simple parser...

index.php

@@ -0,0 +1,87 @@
+<?php
+echo "DRAFT! WORK IN PROGRESS! PROOF OF CONCEPT! DUMMY! GO Ahead, improve it\n";
+
+function latex_convert($content, $depth = 0) {
+    global $texcommands;
+
+    static $ignore_file = array('osp-hyphenation' => true);
+
+    $content = preg_replace('@^(\s*%.*)$@imsU', '', $content);
+
+    preg_match_all('@(\\\\include\{([^\}]+)\})@i', $content, $m);
+
+    if (is_array($m[2])) {
+        foreach($m[2] AS $idx => $include) {
+            if (isset($ignore_file[$include])) {
+                echo "Ignore include of " . $include . ".tex...\n";
+                $content = str_replace($m[0][$idx], 
+                  '<!-- IGNORE INCLUDE: ' . $include . '-->' . "\n",
+                  $content); 
+                continue;
+            }
+
+            echo "Parsing include of " . $include . ".tex...\n";
+            $content = str_replace($m[0][$idx], 
+              '<!-- INCLUDE: ' . $include . '-->' . "\n" 
+                . latex_convert(file_get_contents($include . '.tex'), $depth+1)
+              . '<!--/INCLUDE: ' . $include . ' -->' . "\n", $content);
+        }
+    }
+
+    latex_grep('@\\\\([\w]+)\s@imsU', 'LaTeX commands like \stuff (without commands)', $content);
+
+    latex_grep('@\\\\([\w]+)(\{[^\}]*\})+@ims', 'LaTeX commands like \stuff{...} (with commands)', $content);
+
+    if ($depth == 0) {
+        arsort($texcommands);
+        print_r($texcommands);
+    }
+
+    return $content;
+}
+
+function latex_grep($regexp, $desc, &$content) {
+    global $texcommands;
+
+    preg_match_all($regexp, $content, $m);
+
+    if (is_array($m[1])) {
+        foreach($m[1] AS $idx => $command) {
+            if ($GLOBALS['debug']) echo "Found LaTEX $desc:\n   " . trim($m[0][$idx]) . "\n";
+
+            if ($command == 'emph') {
+                if ($GLOBALS['debug']) echo "<em> replacement.\n";
+                $content = str_replace($m[0][$idx], '<em>' . trim($m[2][$idx]) . '</em>', $content);
+                continue;
+            }
+
+            if ($command == 'cmd') {
+                if ($GLOBALS['debug']) echo "<code> replacement.\n";
+                $content = str_replace($m[0][$idx], '<code>' . trim($m[2][$idx]) . '</code>', $content);
+                continue;
+            }
+
+            if ($command == 'index') {
+                if ($GLOBALS['debug']) echo "<index> replacement, ignore.\n";
+                continue;
+            }
+
+
+            @$texcommands[$command]++;
+
+        }
+    }
+
+}
+
+$debug = false;
+
+$texcommands = array();
+$base = file_get_contents('serendipity.tex');
+
+$all = latex_convert($base);
+$fp = fopen('index.txt', 'w');
+
+if (!$fp) die('index.txt needs to be writable');
+echo fwrite($fp, $all) . " bytes written to index.txt\n";
+