1 files changed, 96 insertions, 0 deletions
diff --git a/ext/standard/tests/array/array_key_exists_variation6.phpt b/ext/standard/tests/array/array_key_exists_variation6.phpt
new file mode 100644
index 0000000..d19e58e
--- /dev/null
+++ b/ext/standard/tests/array/array_key_exists_variation6.phpt
@@ -0,0 +1,96 @@
+--TEST--
+Test array_key_exists() function : usage variations -  equality test for certain data types
+--FILE--
+<?php
+/* Prototype  : bool array_key_exists(mixed $key, array $search)
+ * Description: Checks if the given key or index exists in the array 
+ * Source code: ext/standard/array.c
+ * Alias to functions: key_exists
+ */
+
+/*
+ * Pass certain data types that can be taken as a key in an array 
+ * and test whether array_key_exists(() thinks they are equal and therefore
+ * returns true when searching for them
+ */
+
+echo "*** Testing array_key_exists() : usage variations ***\n";
+
+$unset = 10;
+unset($unset);
+$array = array ('null' => null, 
+                'NULL' => NULL, 
+                'empty single quoted string' => '', 
+                "empty double quoted string" => "", 
+                'undefined variable' => @$undefined,
+                'unset variable' => @$unset);
+
+//iterate through original array
+foreach($array as $name => $input) {
+	$iterator = 1;
+	echo "\n-- Key in \$search array is : $name --\n";
+	$search[$input] = 'test';
+	
+	//iterate through array again to see which values are considered equal
+	foreach($array as $key) {
+		echo "Iteration $iterator:  ";
+		var_dump(array_key_exists($key, $search));
+		$iterator++;
+	}
+	$search = null;
+}
+
+echo "Done";
+?>
+
+--EXPECTF--
+*** Testing array_key_exists() : usage variations ***
+
+-- Key in $search array is : null --
+Iteration 1:  bool(true)
+Iteration 2:  bool(true)
+Iteration 3:  bool(true)
+Iteration 4:  bool(true)
+Iteration 5:  bool(true)
+Iteration 6:  bool(true)
+
+-- Key in $search array is : NULL --
+Iteration 1:  bool(true)
+Iteration 2:  bool(true)
+Iteration 3:  bool(true)
+Iteration 4:  bool(true)
+Iteration 5:  bool(true)
+Iteration 6:  bool(true)
+
+-- Key in $search array is : empty single quoted string --
+Iteration 1:  bool(true)
+Iteration 2:  bool(true)
+Iteration 3:  bool(true)
+Iteration 4:  bool(true)
+Iteration 5:  bool(true)
+Iteration 6:  bool(true)
+
+-- Key in $search array is : empty double quoted string --
+Iteration 1:  bool(true)
+Iteration 2:  bool(true)
+Iteration 3:  bool(true)
+Iteration 4:  bool(true)
+Iteration 5:  bool(true)
+Iteration 6:  bool(true)
+
+-- Key in $search array is : undefined variable --
+Iteration 1:  bool(true)
+Iteration 2:  bool(true)
+Iteration 3:  bool(true)
+Iteration 4:  bool(true)
+Iteration 5:  bool(true)
+Iteration 6:  bool(true)
+
+-- Key in $search array is : unset variable --
+Iteration 1:  bool(true)
+Iteration 2:  bool(true)
+Iteration 3:  bool(true)
+Iteration 4:  bool(true)
+Iteration 5:  bool(true)
+Iteration 6:  bool(true)
+Done
+\ No newline at end of file