Add a check that makes sure PDO is available

Calling an unavailable class is a fatal error, so people without PDO
were left with a fairly useless blank screen and no indicator of what
was wrong. Let's be a bit more user-friendly.

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/debug.lib.php b/lib/debug.lib.php
index f1c5dbcc..f96c9ffa 100644
--- a/lib/debug.lib.php
+++ b/lib/debug.lib.php
@@ -74,6 +74,19 @@ function check_php_pcre() {
 } // check_php_pcre
 
 /**
+ * check_pdo
+ *
+ * Checks to make sure that PDO is available.
+ */
+function check_pdo() {
+    if (class_exists('PDO') && in_array('mysql', PDO::getAvailableDrivers())) {
+        return true;
+    }
+
+    return false;
+}
+
+/**
  * check_config_values
  * checks to make sure that they have at least set the needed variables
  */