this test is flaky on azure, and can't see why from current output

so refactored, and restored an accidentally removed check (resource)

Author: krakjoe

ext/standard/tests/file/is_file_variation3.phpt

@@ -9,51 +9,44 @@ Test is_file() function: usage variations - invalid filenames
 
 /* Testing is_file() with invalid arguments -int, float, bool, NULL, resource */
 
-$file_path = __DIR__;
-$file_handle = fopen($file_path."/is_file_variation3.tmp", "w");
+function flatten($variable) {
+    \ob_start();
+    \var_dump($variable);
+    $flattened =
+        \ob_get_contents();
+    \ob_end_clean();
+    return \trim($flattened);
+}
 
-echo "*** Testing Invalid file types ***\n";
-$filenames = array(
+foreach([
   /* Invalid filenames */
   -2.34555,
   " ",
   "",
-  TRUE,
-  FALSE,
-  NULL,
-  $file_handle,
+  true,
+  false,
+  null,
 
   /* scalars */
   1234,
-  0
-);
-
-/* loop through to test each element the above array */
-foreach( $filenames as $filename ) {
-  var_dump( is_file($filename) );
+  0,
+
+  /* resource */
+  fopen(__FILE__, "r")
+] as $filename ) {
+  printf(
+      "%s: %d\n",
+      flatten($filename), @is_file($filename));
   clearstatcache();
 }
-fclose($file_handle);
-
-echo "\n*** Done ***";
-?>
---CLEAN--
-<?php
-$file_path = __DIR__;
-unlink($file_path."/is_file_variation3.tmp");
 ?>
 --EXPECTF--
-*** Testing Invalid file types ***
-bool(false)
-bool(false)
-bool(false)
-bool(false)
-bool(false)
-bool(false)
-
-Warning: is_file() expects parameter 1 to be a valid path, resource given in %s on line %d
-NULL
-bool(false)
-bool(false)
-
-*** Done ***
+float(-2.34555): 0
+string(1) " ": 0
+string(0) "": 0
+bool(true): 0
+bool(false): 0
+NULL: 0
+int(1234): 0
+int(0): 0
+resource(%d) of type (stream): 0