1 files changed, 155 insertions, 0 deletions
diff --git a/ext/standard/tests/array/key_variation2.phpt b/ext/standard/tests/array/key_variation2.phpt
new file mode 100644
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+++ b/ext/standard/tests/array/key_variation2.phpt
@@ -0,0 +1,155 @@
+--TEST--
+Test key() function : usage variations
+--FILE--
+<?php
+/* Prototype  : mixed key(array $array_arg)
+ * Description: Return the key of the element currently pointed to by the internal array pointer 
+ * Source code: ext/standard/array.c
+ */
+
+/*
+ * Pass arrays where keys are different data types as $array_arg to key() to test behaviour
+ */
+
+echo "*** Testing key() : usage variations ***\n";
+
+//get an unset variable
+$unset_var = 10;
+unset ($unset_var);
+
+// heredoc string
+$heredoc = <<<EOT
+hello world
+EOT;
+
+// unexpected values to be passed as $array_arg
+$inputs = array(
+
+       // int data
+/*1*/  'int' => array(
+       0 => 'zero',
+       1 => 'one',
+       12345 => 'positive',
+       -2345 => 'negative',
+       ),
+
+       // float data
+/*2*/  'float' => array(
+       10.5 => 'positive',
+       -10.5 => 'negative',
+       .5 => 'half',
+       ),
+       
+/*3*/  'extreme floats' => array(
+       12.3456789000e6 => 'large',
+       12.3456789000E-10 => 'small',
+       ),
+
+       // null data
+/*4*/ 'null uppercase' => array(
+       NULL => 'null 1',
+       ), 
+       
+/*5*/  'null lowercase' => array(
+       null => 'null 2',
+       ),
+
+       // boolean data
+/*6*/ 'bool lowercase' => array(
+       true => 'lowert',
+       false => 'lowerf',
+       ),
+       
+/*7*/  'bool uppercase' => array(
+       TRUE => 'uppert',
+       FALSE => 'upperf',
+       ),
+       
+       // empty data
+/*8*/ 'empty double quotes' => array(
+       "" => 'emptyd',
+       ),
+       
+/*9*/  'empty single quotes' => array(
+       '' => 'emptys',
+       ),
+
+       // string data
+/*10*/ 'string' => array(
+       "stringd" => 'stringd',
+       'strings' => 'strings',
+       $heredoc => 'stringh',
+       ),
+
+       // undefined data
+/*11*/ 'undefined' => array(
+       @$undefined_var => 'undefined',
+       ),
+
+       // unset data
+/*12*/ 'unset' => array(
+       @$unset_var => 'unset',
+       ),
+);
+
+// loop through each element of $inputs to check the behavior of key()
+$iterator = 1;
+foreach($inputs as $key => $input) {
+  echo "\n-- Iteration $iterator : $key data --\n";
+  while (key($input) !== NULL) {
+  	var_dump(key($input));
+  	next($input);
+  }
+  $iterator++;
+};
+?>
+===DONE===
+--EXPECTF--
+*** Testing key() : usage variations ***
+
+-- Iteration 1 : int data --
+int(0)
+int(1)
+int(12345)
+int(-2345)
+
+-- Iteration 2 : float data --
+int(10)
+int(-10)
+int(0)
+
+-- Iteration 3 : extreme floats data --
+int(12345678)
+int(0)
+
+-- Iteration 4 : null uppercase data --
+string(0) ""
+
+-- Iteration 5 : null lowercase data --
+string(0) ""
+
+-- Iteration 6 : bool lowercase data --
+int(1)
+int(0)
+
+-- Iteration 7 : bool uppercase data --
+int(1)
+int(0)
+
+-- Iteration 8 : empty double quotes data --
+string(0) ""
+
+-- Iteration 9 : empty single quotes data --
+string(0) ""
+
+-- Iteration 10 : string data --
+string(7) "stringd"
+string(7) "strings"
+string(11) "hello world"
+
+-- Iteration 11 : undefined data --
+string(0) ""
+
+-- Iteration 12 : unset data --
+string(0) ""
+===DONE===