1 files changed, 7 insertions, 0 deletions
diff --git a/classes/PhpIsisDb.php b/classes/PhpIsisDb.php
index 136b657..1f64075 100644
--- a/classes/PhpIsisDb.php
+++ b/classes/PhpIsisDb.php
@@ -87,6 +87,13 @@ class PhpIsisDb implements IsisDb {
    * @see IsisDb::check()
    */  
   public function check($schema, $section = NULL) {
+    // Check API availability.
+    if (!function_exists('isis_open')) {
+      throw new Exception('Could not find function isis_open. Please check your php-isis installation.');
+      return FALSE;
+    }
+
+    // Check schema configuration.
     return SchemaDb::check($schema, $section);
   }