Merge branch 'fix-twitterbridge' into 'nightly'

[quix0rs-gnu-social.git] / lib / util.php

diff --git a/lib/util.php b/lib/util.php
index 985b3773df38a4a63e4659339a14f114e3f7af80..aa0d5bfe7663b5fda8b90e483de3efb6a1108313 100644 (file)
--- a/lib/util.php
+++ b/lib/util.php
@@ -581,6 +581,15 @@ function common_canonical_email($email)
     return $email;
 }
 
+function common_to_alphanumeric($str)
+{
+    $filtered = preg_replace('/[^A-Za-z0-9]\s*/', '', $str);
+    if (strlen($filtered) < 1) {
+        throw new Exception('Filtered string was zero-length.');
+    }
+    return $filtered;
+}
+
 function common_purify($html, array $args=array())
 {
     require_once INSTALLDIR.'/extlib/HTMLPurifier/HTMLPurifier.auto.php';