avoid warning "fpassthru() expects parameter 1 to be resource, ... given"

Author: bsl

packages/collections/db/export-ead.inc.php

@@ -243,7 +243,8 @@ function findingaid_DisplayContent($id, $objCollection, $readPermissions)
 
    // deliver the zip file
    $fp = fopen("$tmp_zip","r");
-   echo fpassthru($fp);
+   if (is_resource($fp))
+      echo fpassthru($fp);
 
    // clean up the tmp zip file
    exec("rm $tmp_zip");

packages/collections/db/export-marc.inc.php

@@ -408,7 +408,8 @@
 
    // deliver the zip file
    $fp = fopen("$tmp_zip","r");
-   echo fpassthru($fp);
+   if (is_resource($fp))
+      echo fpassthru($fp);
 
    // clean up the tmp zip file
    exec("rm $tmp_zip");

packages/creators/db/export-eac.inc.php

@@ -164,7 +164,8 @@
 
    // deliver the zip file
    $fp = fopen("$tmp_zip","r");
-   echo fpassthru($fp);
+   if (is_resource($fp))
+      echo fpassthru($fp);
 
    // clean up the tmp zip file
    exec("rm $tmp_zip");