diff --git a/binding/php/XdbSearcher.class.php b/binding/php/XdbSearcher.class.php
index d5292d7..6ebd375 100644
--- a/binding/php/XdbSearcher.class.php
+++ b/binding/php/XdbSearcher.class.php
@@ -108,6 +108,9 @@ class XdbSearcher
         if ($this->vectorIndex != null) {
             $sPtr = self::getLong($this->vectorIndex, $idx);
             $ePtr = self::getLong($this->vectorIndex, $idx + 4);
+        } else if ($this->contentBuff != null) {
+            $sPtr = self::getLong($this->contentBuff, self::HeaderInfoLength + $idx);
+            $ePtr = self::getLong($this->contentBuff, self::HeaderInfoLength + $idx + 4);
         } else {
             // read the vector index block
             $buff = $this->read(self::HeaderInfoLength + $idx, 8);