Add table of contents update to readme update script

Author: zachborboa

scripts/update_readme_methods.sh

@@ -26,3 +26,19 @@ echo '```' >> "README.md"
 echo >> "README.md"
 
 echo "${after}" >> "README.md"
+
+# Update table of contents.
+script=$(cat <<'EOF'
+    $data = file_get_contents('README.md');
+    preg_match_all('/^### ([\w ]+)/m', $data, $matches);
+    $toc = array();
+    foreach ($matches['1'] as $match) {
+        $href = '#' . str_replace(' ', '-', strtolower($match));
+        $toc[] = '- [' . $match . '](' . $href . ')';
+    }
+    $toc = implode("\n", $toc);
+    $toc = '---' . "\n\n" . $toc . "\n\n" . '---' . "\n\n";
+    $data = preg_replace('/---\n\n(?:- .*\n)+?\n---\n\n/', $toc, $data);
+    file_put_contents('README.md', $data);
+EOF)
+php --run "${script}"