1 files changed, 59 insertions, 0 deletions
diff --git a/ext/standard/tests/array/array_diff_key_variation7.phpt b/ext/standard/tests/array/array_diff_key_variation7.phpt
new file mode 100644
index 0000000..c2e806c
--- /dev/null
+++ b/ext/standard/tests/array/array_diff_key_variation7.phpt
@@ -0,0 +1,59 @@
+--TEST--
+Test array_diff_key() function : usage variation - Passing null,unset and undefined variable indexed array
+--FILE--
+<?php
+/* Prototype  : array array_diff_key(array arr1, array arr2 [, array ...])
+ * Description: Returns the entries of arr1 that have keys which are not present in any of the others arguments. 
+ * Source code: ext/standard/array.c
+ */
+
+echo "*** Testing array_diff_key() : usage variation ***\n";
+
+// Initialise function arguments not being substituted (if any)
+$input_array = array(10 => '10', "" => 'empty'); 
+
+//get an unset variable
+$unset_var = 10;
+unset ($unset_var);
+
+$input_arrays = array(
+      'null indexed' => array(NULL => 'null 1', null => 'null 2'),
+      'undefined indexed' => array(@$undefined_var => 'undefined'),
+      'unset  indexed' => array(@$unset_var => 'unset'),
+);
+
+foreach($input_arrays as $key =>$value) {
+      echo "\n--$key--\n";
+      // loop through each element of the array for arr1
+      var_dump( array_diff_key($input_array, $value) );
+      var_dump( array_diff_key($value, $input_array) );
+}      
+?>
+===DONE===
+--EXPECTF--
+*** Testing array_diff_key() : usage variation ***
+
+--null indexed--
+array(1) {
+  [10]=>
+  string(2) "10"
+}
+array(0) {
+}
+
+--undefined indexed--
+array(1) {
+  [10]=>
+  string(2) "10"
+}
+array(0) {
+}
+
+--unset  indexed--
+array(1) {
+  [10]=>
+  string(2) "10"
+}
+array(0) {
+}
+===DONE===
+\ No newline at end of file