add htmlpurifier iframe filter to allow any sort of non-sense

1 files changed, 20 insertions, 0 deletions

diff --git a/htmlpure/Filter/SafeIframe.php b/htmlpure/Filter/SafeIframe.php
new file mode 100644
index 0000000..370c89c
--- /dev/null
+++ b/htmlpure/Filter/SafeIframe.php
@@ -0,0 +1,20 @@
+<?php
+  
+class HTMLPurifier_Filter_SafeIframe extends HTMLPurifier_Filter
+{
+    public $name = 'SafeIframe';
+
+    public function preFilter($html, $config, $context) {
+        return preg_replace("/iframe/", "img class=\"SafeIframe\" ", preg_replace("/<\/iframe>/", "", $html));
+    }
+
+    public function postFilter($html, $config, $context) {
+       $post_regex = '#<img class="SafeIframe" ([^>]+)>#';
+        return preg_replace_callback($post_regex, array($this, 'postFilterCallback'), $html);
+    }
+
+    protected function postFilterCallback($matches) {
+        return '<iframe '.$matches[1].'></iframe>';
+    }
+}
+