diff --git a/src/_h5ai/php/inc/H5ai.php b/src/_h5ai/php/inc/H5ai.php
index 4cb2b8c2..b0029ebd 100644
--- a/src/_h5ai/php/inc/H5ai.php
+++ b/src/_h5ai/php/inc/H5ai.php
@@ -86,19 +86,6 @@ class H5ai {
 	}
 
 
-	public function getCacheAbsPath() {
-
-		return $this->h5aiAbsPath . '/cache';
-	}
-
-
-	public function getTempAbsPath() {
-
-		// return H5ai::normalize_path(sys_get_temp_dir());
-		return $this->h5aiAbsPath . '/cache';
-	}
-
-
 	public function getRootAbsHref() {
 
 		return $this->rootAbsHref;
@@ -111,6 +98,25 @@ class H5ai {
 	}
 
 
+	public function getCacheAbsPath() {
+
+		return $this->h5aiAbsPath . '/cache';
+	}
+
+
+	public function getCacheAbsHref() {
+
+		return $this->h5aiAbsHref . 'cache/';
+	}
+
+
+	public function getTempAbsPath() {
+
+		// return H5ai::normalize_path(sys_get_temp_dir());
+		return $this->h5aiAbsPath . '/cache';
+	}
+
+
 	public function getOptions() {
 
 		return $this->options;
diff --git a/src/_h5ai/php/inc/Thumb.php b/src/_h5ai/php/inc/Thumb.php
index 173df884..cbaf01e4 100644
--- a/src/_h5ai/php/inc/Thumb.php
+++ b/src/_h5ai/php/inc/Thumb.php
@@ -47,10 +47,10 @@ class Thumb {
 			return null;
 		}
 
-		$name = "cache/thumb-" . sha1("$sourceAbsPath-$width-$height-$mode") . ".jpg";
-		// $name = "cache/thumb-" . sha1("$sourceAbsPath-$width-$height-$mode") . ".png";
-		$thumbAbsHref = $this->h5ai->getH5aiAbsHref() . $name;
-		$thumbAbsPath = $this->h5ai->getH5aiAbsPath() . "/" . $name;
+		$name = "thumb-" . sha1("$sourceAbsPath-$width-$height-$mode") . ".jpg";
+		// $name = "thumb-" . sha1("$sourceAbsPath-$width-$height-$mode") . ".png";
+		$thumbAbsPath = $this->h5ai->getCacheAbsPath() . "/" . $name;
+		$thumbAbsHref = $this->h5ai->getCacheAbsHref() . $name;
 
 		if (!file_exists($thumbAbsPath) || filemtime($sourceAbsPath) >= filemtime($thumbAbsPath)) {
 			$image = new Image();