- committing tests for array_merge() function

ext/standard/tests/array/array_merge_basic.phpt

@@ -0,0 +1,58 @@
+--TEST--
+Test array_merge() function : basic functionality 
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/*
+ * Test basic functionality of array_merge()
+ */
+
+echo "*** Testing array_merge() : basic functionality ***\n";
+
+//indexed array
+$array1 = array ('zero', 'one', 'two');
+//associative array
+$array2 = array ('a' => 1, 'b' => 2, 'c' => 3);
+
+var_dump(array_merge($array1, $array2));
+
+var_dump(array_merge($array2, $array1));
+
+echo "Done";
+?>
+
+--EXPECTF--
+*** Testing array_merge() : basic functionality ***
+array(6) {
+  [0]=>
+  string(4) "zero"
+  [1]=>
+  string(3) "one"
+  [2]=>
+  string(3) "two"
+  ["a"]=>
+  int(1)
+  ["b"]=>
+  int(2)
+  ["c"]=>
+  int(3)
+}
+array(6) {
+  ["a"]=>
+  int(1)
+  ["b"]=>
+  int(2)
+  ["c"]=>
+  int(3)
+  [0]=>
+  string(4) "zero"
+  [1]=>
+  string(3) "one"
+  [2]=>
+  string(3) "two"
+}
+Done

ext/standard/tests/array/array_merge_error.phpt

@@ -0,0 +1,30 @@
+--TEST--
+Test array_merge() function : error conditions - Pass incorrect number of args
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/*
+ * Pass incorrect number of arguments to array_merge() to test behaviour
+ */
+
+echo "*** Testing array_merge() : error conditions ***\n";
+
+// Testing array_merge with zero arguments
+echo "\n-- Testing array_merge() function with less than expected no. of arguments --\n";
+$arr1 = array(1, 2);
+var_dump( array_merge() );
+
+echo "Done";
+?>
+--EXPECTF--
+*** Testing array_merge() : error conditions ***
+
+-- Testing array_merge() function with less than expected no. of arguments --
+
+Warning: Wrong parameter count for array_merge() in %s on line %d
+NULL
+Done

ext/standard/tests/array/array_merge_variation1.phpt

@@ -0,0 +1,231 @@
+--TEST--
+Test array_merge() function : usage variations - Pass different data types to $arr1 arg
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/*
+ * Pass different data types as $arr1 argument to test behaviour
+ */
+
+echo "*** Testing array_merge() : usage variations ***\n";
+
+// Initialise function arguments not being substituted
+$arr2 = array (1, 2);
+
+//get an unset variable
+$unset_var = 10;
+unset ($unset_var);
+
+// get a class
+class classA
+{
+  public function __toString() {
+    return "Class A object";
+  }
+}
+
+// heredoc string
+$heredoc = <<<EOT
+hello world
+EOT;
+
+// get a resource variable
+$fp = fopen(__FILE__, "r");
+
+// unexpected values to be passed to $arr1 argument
+$inputs = array(
+
+       // int data
+/*1*/  0,
+       1,
+       12345,
+       -2345,
+
+       // float data
+/*5*/  10.5,
+       -10.5,
+       12.3456789000e10,
+       12.3456789000E-10,
+       .5,
+
+       // null data
+/*10*/ NULL,
+       null,
+
+       // boolean data
+/*12*/ true,
+       false,
+       TRUE,
+       FALSE,
+       
+       // empty data
+/*16*/ "",
+       '',
+       array(),
+
+       // string data
+/*19*/ "string",
+       'string',
+       $heredoc,
+       
+       // object data
+/*22*/ new classA(),
+
+       // undefined data
+/*23*/ @$undefined_var,
+
+       // unset data
+/*24*/ @$unset_var,
+
+       // resource variable
+/*25*/ $fp
+);
+
+// loop through each element of $inputs to check the behavior of array_merge()
+$iterator = 1;
+foreach($inputs as $input) {
+  echo "\n-- Iteration $iterator --\n";
+  var_dump( array_merge($input, $arr2) );
+  $iterator++;
+};
+
+fclose($fp);
+
+echo "Done";
+?>
+
+--EXPECTF--
+*** Testing array_merge() : usage variations ***
+
+-- Iteration 1 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 2 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 3 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 4 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 5 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 6 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 7 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 8 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 9 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 10 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 11 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 12 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 13 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 14 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 15 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 16 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 17 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 18 --
+array(2) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+}
+
+-- Iteration 19 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 20 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 21 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 22 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 23 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 24 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+
+-- Iteration 25 --
+
+Warning: array_merge(): Argument #1 is not an array in %s on line %d
+NULL
+Done

ext/standard/tests/array/array_merge_variation10.phpt

@@ -0,0 +1,70 @@
+--TEST--
+Test array_merge() function : usage variations - position of internal array pointer
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/* 
+ * Check the position of the internal array pointer after calling array_merge().
+ * This test is also passing more than two arguments to array_merge().
+ */
+
+echo "*** Testing array_merge() : usage variations ***\n";
+
+$arr1 = array ('zero', 'one', 'two');
+$arr2 = array ('zero', 'un', 'deux');
+$arr3 = array ('null', 'eins', 'zwei');
+
+echo "\n-- Call array_merge() --\n";
+var_dump($result = array_merge($arr1, $arr2, $arr3));
+
+echo "\n-- Position of Internal Pointer in Result: --\n";
+echo key($result) . " => " . current($result) . "\n";
+
+echo "\n-- Position of Internal Pointer in Original Array: --\n";
+echo "\$arr1: ";
+echo key($arr1) . " => " . current ($arr1) . "\n";
+echo "\$arr2: ";
+echo key($arr2) . " => " . current ($arr2) . "\n";
+echo "\$arr3: ";
+echo key($arr3) . " => " . current ($arr3) . "\n";
+
+echo "Done";
+?>
+
+--EXPECTF--
+*** Testing array_merge() : usage variations ***
+
+-- Call array_merge() --
+array(9) {
+  [0]=>
+  string(4) "zero"
+  [1]=>
+  string(3) "one"
+  [2]=>
+  string(3) "two"
+  [3]=>
+  string(4) "zero"
+  [4]=>
+  string(2) "un"
+  [5]=>
+  string(4) "deux"
+  [6]=>
+  string(4) "null"
+  [7]=>
+  string(4) "eins"
+  [8]=>
+  string(4) "zwei"
+}
+
+-- Position of Internal Pointer in Result: --
+0 => zero
+
+-- Position of Internal Pointer in Original Array: --
+$arr1: 0 => zero
+$arr2: 0 => zero
+$arr3: 0 => null
+Done

ext/standard/tests/array/array_merge_variation2.phpt

@@ -0,0 +1,230 @@
+--TEST--
+Test array_merge() function : usage variations - Pass different data types as $arr2 arg
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/*
+ * Pass different data types as $arr2 argument to array_merge() to test behaviour
+ */
+
+echo "*** Testing array_merge() : usage variations ***\n";
+
+// Initialise function arguments not being substituted
+$arr1 = array (1, 2);
+
+//get an unset variable
+$unset_var = 10;
+unset ($unset_var);
+
+// get a class
+class classA
+{
+  public function __toString() {
+    return "Class A object";
+  }
+}
+
+// heredoc string
+$heredoc = <<<EOT
+hello world
+EOT;
+
+// get a resource variable
+$fp = fopen(__FILE__, "r");
+
+// unexpected values to be passed to $arr2 argument
+$inputs = array(
+
+       // int data
+/*1*/  0,
+       1,
+       12345,
+       -2345,
+
+       // float data
+/*5*/  10.5,
+       -10.5,
+       12.3456789000e10,
+       12.3456789000E-10,
+       .5,
+
+       // null data
+/*10*/ NULL,
+       null,
+
+       // boolean data
+/*12*/ true,
+       false,
+       TRUE,
+       FALSE,
+       
+       // empty data
+/*16*/ "",
+       '',
+       array(),
+
+       // string data
+/*19*/ "string",
+       'string',
+       $heredoc,
+       
+       // object data
+/*22*/ new classA(),
+
+       // undefined data
+/*23*/ @$undefined_var,
+
+       // unset data
+/*24*/ @$unset_var,
+
+       // resource variable
+/*25*/ $fp
+);
+
+// loop through each element of $inputs to check the behavior of array_merge()
+$iterator = 1;
+foreach($inputs as $input) {
+  echo "\n-- Iteration $iterator --\n";
+  var_dump( array_merge($arr1, $input) );
+  $iterator++;
+};
+
+fclose($fp);
+
+echo "Done";
+?>
+--EXPECTF--
+*** Testing array_merge() : usage variations ***
+
+-- Iteration 1 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 2 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 3 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 4 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 5 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 6 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 7 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 8 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 9 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 10 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 11 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 12 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 13 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 14 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 15 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 16 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 17 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 18 --
+array(2) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+}
+
+-- Iteration 19 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 20 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 21 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 22 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 23 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 24 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+
+-- Iteration 25 --
+
+Warning: array_merge(): Argument #2 is not an array in %s on line %d
+NULL
+Done

ext/standard/tests/array/array_merge_variation3.phpt

@@ -0,0 +1,379 @@
+--TEST--
+Test array_merge() function : usage variations - arrays of diff. data types
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/*
+ * Pass arrays of different data types to test how array_merge adds them
+ * onto an existing array
+ */
+
+echo "*** Testing array_merge() : usage variations ***\n";
+
+// Initialise function arguments not being substituted
+$arr = array (1, 2);
+
+//get an unset variable
+$unset_var = 10;
+unset ($unset_var);
+
+// get a class
+class classA
+{
+  public function __toString() {
+    return "Class A object";
+  }
+}
+
+// heredoc string
+$heredoc = <<<EOT
+hello world
+EOT;
+
+// get a resource variable
+$fp = fopen(__FILE__, "r");
+
+// arrays of different data types to be passed as $input
+$inputs = array(
+
+       // int data
+/*1*/  'int' => array(
+	   0,
+       1,
+       12345,
+       -2345,
+       ),
+
+       // float data
+/*2*/  'float' => array(
+       10.5,
+       -10.5,
+       12.3456789000e10,
+       12.3456789000E-10,
+       .5,
+       ),
+
+       // null data
+/*3*/ 'null' => array(
+       NULL,
+       null,
+       ),
+
+       // boolean data
+/*4*/ 'bool' => array(
+       true,
+       false,
+       TRUE,
+       FALSE,
+       ),
+       
+       // empty data
+/*5*/ 'empty string' => array(
+       "",
+       '',
+       ),
+       
+/*6*/ 'empty array' => array(
+       ),
+
+       // string data
+/*7*/ 'string' => array(
+       "string",
+       'string',
+       $heredoc,
+       ),
+       
+       // object data
+/*8*/ 'object' => array(
+       new classA(),
+       ),
+
+       // undefined data
+/*9*/ 'undefined' => array(
+       @$undefined_var,
+       ),
+
+       // unset data
+/*10*/ 'unset' => array(
+       @$unset_var,
+       ),
+
+       // resource variable
+/*11*/ 'resource' => array(
+       $fp
+       ),
+);
+
+// loop through each element of $inputs to check the behavior of array_merge
+$iterator = 1;
+foreach($inputs as $key => $input) {
+  echo "\n-- Iteration $iterator: $key data --\n";
+  var_dump( array_merge($input, $arr) );
+  var_dump( array_merge($arr, $input) );
+  $iterator++;
+};
+
+fclose($fp);
+
+echo "Done";
+?>
+
+--EXPECTF--
+*** Testing array_merge() : usage variations ***
+
+-- Iteration 1: int data --
+array(6) {
+  [0]=>
+  int(0)
+  [1]=>
+  int(1)
+  [2]=>
+  int(12345)
+  [3]=>
+  int(-2345)
+  [4]=>
+  int(1)
+  [5]=>
+  int(2)
+}
+array(6) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  int(0)
+  [3]=>
+  int(1)
+  [4]=>
+  int(12345)
+  [5]=>
+  int(-2345)
+}
+
+-- Iteration 2: float data --
+array(7) {
+  [0]=>
+  float(10.5)
+  [1]=>
+  float(-10.5)
+  [2]=>
+  float(123456789000)
+  [3]=>
+  float(1.23456789E-9)
+  [4]=>
+  float(0.5)
+  [5]=>
+  int(1)
+  [6]=>
+  int(2)
+}
+array(7) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  float(10.5)
+  [3]=>
+  float(-10.5)
+  [4]=>
+  float(123456789000)
+  [5]=>
+  float(1.23456789E-9)
+  [6]=>
+  float(0.5)
+}
+
+-- Iteration 3: null data --
+array(4) {
+  [0]=>
+  NULL
+  [1]=>
+  NULL
+  [2]=>
+  int(1)
+  [3]=>
+  int(2)
+}
+array(4) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  NULL
+  [3]=>
+  NULL
+}
+
+-- Iteration 4: bool data --
+array(6) {
+  [0]=>
+  bool(true)
+  [1]=>
+  bool(false)
+  [2]=>
+  bool(true)
+  [3]=>
+  bool(false)
+  [4]=>
+  int(1)
+  [5]=>
+  int(2)
+}
+array(6) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  bool(true)
+  [3]=>
+  bool(false)
+  [4]=>
+  bool(true)
+  [5]=>
+  bool(false)
+}
+
+-- Iteration 5: empty string data --
+array(4) {
+  [0]=>
+  string(0) ""
+  [1]=>
+  string(0) ""
+  [2]=>
+  int(1)
+  [3]=>
+  int(2)
+}
+array(4) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  string(0) ""
+  [3]=>
+  string(0) ""
+}
+
+-- Iteration 6: empty array data --
+array(2) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+}
+array(2) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+}
+
+-- Iteration 7: string data --
+array(5) {
+  [0]=>
+  string(6) "string"
+  [1]=>
+  string(6) "string"
+  [2]=>
+  string(11) "hello world"
+  [3]=>
+  int(1)
+  [4]=>
+  int(2)
+}
+array(5) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  string(6) "string"
+  [3]=>
+  string(6) "string"
+  [4]=>
+  string(11) "hello world"
+}
+
+-- Iteration 8: object data --
+array(3) {
+  [0]=>
+  object(classA)#%d (0) {
+  }
+  [1]=>
+  int(1)
+  [2]=>
+  int(2)
+}
+array(3) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  object(classA)#%d (0) {
+  }
+}
+
+-- Iteration 9: undefined data --
+array(3) {
+  [0]=>
+  NULL
+  [1]=>
+  int(1)
+  [2]=>
+  int(2)
+}
+array(3) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  NULL
+}
+
+-- Iteration 10: unset data --
+array(3) {
+  [0]=>
+  NULL
+  [1]=>
+  int(1)
+  [2]=>
+  int(2)
+}
+array(3) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  NULL
+}
+
+-- Iteration 11: resource data --
+array(3) {
+  [0]=>
+  resource(%d) of type (stream)
+  [1]=>
+  int(1)
+  [2]=>
+  int(2)
+}
+array(3) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  resource(%d) of type (stream)
+}
+Done

ext/standard/tests/array/array_merge_variation4.phpt

@@ -0,0 +1,368 @@
+--TEST--
+Test array_merge() function : usage variations - Diff. data types as array keys
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/*
+ * Pass an array with different data types as keys to test how array_merge 
+ * adds it onto an existing array
+ */
+
+echo "*** Testing array_merge() : usage variations ***\n";
+
+// Initialise function arguments not being substituted
+$arr = array ('one' => 1, 'two' => 2);
+
+//get an unset variable
+$unset_var = 10;
+unset ($unset_var);
+
+// heredoc string
+$heredoc = <<<EOT
+hello world
+EOT;
+
+// arrays with keys as different data types to be passed as $input
+$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(
+       12.3456789000e10 => '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 $inputs to check the behavior of array_merge
+$iterator = 1;
+foreach($inputs as $key => $input) {
+  echo "\n-- Iteration $iterator: $key data --\n";
+  var_dump( array_merge($input, $arr) );
+  var_dump( array_merge($arr, $input) );
+  $iterator++;
+};
+
+echo "Done";
+?>
+--EXPECTF--
+*** Testing array_merge() : usage variations ***
+
+-- Iteration 1: int data --
+array(6) {
+  [0]=>
+  string(4) "zero"
+  [1]=>
+  string(3) "one"
+  [2]=>
+  string(8) "positive"
+  [3]=>
+  string(8) "negative"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(6) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  [0]=>
+  string(4) "zero"
+  [1]=>
+  string(3) "one"
+  [2]=>
+  string(8) "positive"
+  [3]=>
+  string(8) "negative"
+}
+
+-- Iteration 2: float data --
+array(5) {
+  [0]=>
+  string(8) "positive"
+  [1]=>
+  string(8) "negative"
+  [2]=>
+  string(4) "half"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(5) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  [0]=>
+  string(8) "positive"
+  [1]=>
+  string(8) "negative"
+  [2]=>
+  string(4) "half"
+}
+
+-- Iteration 3: extreme floats data --
+array(4) {
+  [0]=>
+  string(5) "large"
+  [1]=>
+  string(5) "small"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(4) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  [0]=>
+  string(5) "large"
+  [1]=>
+  string(5) "small"
+}
+
+-- Iteration 4: null uppercase data --
+array(3) {
+  [""]=>
+  string(6) "null 1"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(3) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  [""]=>
+  string(6) "null 1"
+}
+
+-- Iteration 5: null lowercase data --
+array(3) {
+  [""]=>
+  string(6) "null 2"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(3) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  [""]=>
+  string(6) "null 2"
+}
+
+-- Iteration 6: bool lowercase data --
+array(4) {
+  [0]=>
+  string(6) "lowert"
+  [1]=>
+  string(6) "lowerf"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(4) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  [0]=>
+  string(6) "lowert"
+  [1]=>
+  string(6) "lowerf"
+}
+
+-- Iteration 7: bool uppercase data --
+array(4) {
+  [0]=>
+  string(6) "uppert"
+  [1]=>
+  string(6) "upperf"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(4) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  [0]=>
+  string(6) "uppert"
+  [1]=>
+  string(6) "upperf"
+}
+
+-- Iteration 8: empty double quotes data --
+array(3) {
+  [""]=>
+  string(6) "emptyd"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(3) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  [""]=>
+  string(6) "emptyd"
+}
+
+-- Iteration 9: empty single quotes data --
+array(3) {
+  [""]=>
+  string(6) "emptys"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(3) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  [""]=>
+  string(6) "emptys"
+}
+
+-- Iteration 10: string data --
+array(5) {
+  ["stringd"]=>
+  string(7) "stringd"
+  ["strings"]=>
+  string(7) "strings"
+  ["hello world"]=>
+  string(7) "stringh"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(5) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  ["stringd"]=>
+  string(7) "stringd"
+  ["strings"]=>
+  string(7) "strings"
+  ["hello world"]=>
+  string(7) "stringh"
+}
+
+-- Iteration 11: undefined data --
+array(3) {
+  [""]=>
+  string(9) "undefined"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(3) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  [""]=>
+  string(9) "undefined"
+}
+
+-- Iteration 12: unset data --
+array(3) {
+  [""]=>
+  string(5) "unset"
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+}
+array(3) {
+  ["one"]=>
+  int(1)
+  ["two"]=>
+  int(2)
+  [""]=>
+  string(5) "unset"
+}
+Done

ext/standard/tests/array/array_merge_variation5.phpt

@@ -0,0 +1,61 @@
+--TEST--
+Test array_merge() function : usage variations - numeric keys
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/*
+ * Pass array_merge() arrays with only numeric keys to test behaviour.
+ * $arr2 contains a duplicate element to $arr1.
+ */
+
+echo "*** Testing array_merge() : usage variations ***\n";
+
+//numeric keys
+$arr1 = array('zero', 'one', 'two', 'three');
+$arr2 = array(1 => 'one', 20 => 'twenty', 30 => 'thirty');
+
+var_dump(array_merge($arr1, $arr2));
+var_dump(array_merge($arr2, $arr1));
+
+echo "Done";
+?>
+
+--EXPECTF--
+*** Testing array_merge() : usage variations ***
+array(7) {
+  [0]=>
+  string(4) "zero"
+  [1]=>
+  string(3) "one"
+  [2]=>
+  string(3) "two"
+  [3]=>
+  string(5) "three"
+  [4]=>
+  string(3) "one"
+  [5]=>
+  string(6) "twenty"
+  [6]=>
+  string(6) "thirty"
+}
+array(7) {
+  [0]=>
+  string(3) "one"
+  [1]=>
+  string(6) "twenty"
+  [2]=>
+  string(6) "thirty"
+  [3]=>
+  string(4) "zero"
+  [4]=>
+  string(3) "one"
+  [5]=>
+  string(3) "two"
+  [6]=>
+  string(5) "three"
+}
+Done

ext/standard/tests/array/array_merge_variation6.phpt

@@ -0,0 +1,53 @@
+--TEST--
+Test array_merge() function : usage variations - string keys
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/*
+ * Pass array_merge arrays with string keys to test behaviour.
+ * $arr2 has a duplicate key to $arr1
+ */
+
+echo "*** Testing array_merge() : usage variations ***\n";
+
+//string keys
+$arr1 = array('zero' => 'zero', 'one' => 'un', 'two' => 'deux');
+$arr2 = array('zero' => 'zero', 'un' => 'eins', 'deux' => 'zwei');
+
+var_dump(array_merge($arr1, $arr2));
+var_dump(array_merge($arr2, $arr1));
+
+echo "Done";
+?>
+
+--EXPECTF--
+*** Testing array_merge() : usage variations ***
+array(5) {
+  ["zero"]=>
+  string(4) "zero"
+  ["one"]=>
+  string(2) "un"
+  ["two"]=>
+  string(4) "deux"
+  ["un"]=>
+  string(4) "eins"
+  ["deux"]=>
+  string(4) "zwei"
+}
+array(5) {
+  ["zero"]=>
+  string(4) "zero"
+  ["un"]=>
+  string(4) "eins"
+  ["deux"]=>
+  string(4) "zwei"
+  ["one"]=>
+  string(2) "un"
+  ["two"]=>
+  string(4) "deux"
+}
+Done

ext/standard/tests/array/array_merge_variation7.phpt

@@ -0,0 +1,65 @@
+--TEST--
+Test array_merge() function : usage variations - Mixed keys
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/*
+ * Pass array_merge() arrays with mixed keys to test how it attaches them to
+ * existing arrays
+ */
+
+echo "*** Testing array_merge() : usage variations ***\n";
+
+//mixed keys
+$arr1 = array('zero', 20 => 'twenty', 'thirty' => 30, true => 'bool');
+$arr2 = array(0, 1, 2, null => 'null', 1.234E-10 => 'float');
+
+var_dump(array_merge($arr1, $arr2));
+var_dump(array_merge($arr2, $arr1));
+
+echo "Done";
+?>
+
+--EXPECTF--
+*** Testing array_merge() : usage variations ***
+array(8) {
+  [0]=>
+  string(4) "zero"
+  [1]=>
+  string(6) "twenty"
+  ["thirty"]=>
+  int(30)
+  [2]=>
+  string(4) "bool"
+  [3]=>
+  string(5) "float"
+  [4]=>
+  int(1)
+  [5]=>
+  int(2)
+  [""]=>
+  string(4) "null"
+}
+array(8) {
+  [0]=>
+  string(5) "float"
+  [1]=>
+  int(1)
+  [2]=>
+  int(2)
+  [""]=>
+  string(4) "null"
+  [3]=>
+  string(4) "zero"
+  [4]=>
+  string(6) "twenty"
+  ["thirty"]=>
+  int(30)
+  [5]=>
+  string(4) "bool"
+}
+Done

ext/standard/tests/array/array_merge_variation8.phpt

@@ -0,0 +1,74 @@
+--TEST--
+Test array_merge() function : usage variations - multi-dimensional arrays
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/*
+ * Test array_merge() with multi-dimensional arrays
+ */
+
+echo "*** Testing array_merge() : usage variations ***\n";
+
+$arr1 = array('zero', 'one', 'two', array(0));
+$arr2 = array(1, 2, 3);
+
+echo "\n-- Merge a two-dimensional and a one-dimensional array --\n";
+var_dump(array_merge($arr1, $arr2));
+
+echo "\n-- Merge an array and a sub-array --\n";
+var_dump(array_merge($arr1[3], $arr2));
+var_dump(array_merge($arr2, $arr1[3]));
+
+echo "Done";
+?>
+
+--EXPECTF--
+*** Testing array_merge() : usage variations ***
+
+-- Merge a two-dimensional and a one-dimensional array --
+array(7) {
+  [0]=>
+  string(4) "zero"
+  [1]=>
+  string(3) "one"
+  [2]=>
+  string(3) "two"
+  [3]=>
+  array(1) {
+    [0]=>
+    int(0)
+  }
+  [4]=>
+  int(1)
+  [5]=>
+  int(2)
+  [6]=>
+  int(3)
+}
+
+-- Merge an array and a sub-array --
+array(4) {
+  [0]=>
+  int(0)
+  [1]=>
+  int(1)
+  [2]=>
+  int(2)
+  [3]=>
+  int(3)
+}
+array(4) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  int(3)
+  [3]=>
+  int(0)
+}
+Done

ext/standard/tests/array/array_merge_variation9.phpt

@@ -0,0 +1,112 @@
+--TEST--
+Test array_merge() function : usage variations - referenced variables
+--FILE--
+<?php
+/* Prototype  : array array_merge(array $arr1, array $arr2 [, array $...])
+ * Description: Merges elements from passed arrays into one array 
+ * Source code: ext/standard/array.c
+ */
+
+/* Test array_merge() when:
+ * 1. Passed an array made up of referenced variables
+ * 2. Passed an array as the first argument and a reference to that array as the second.
+ */
+
+echo "*** Testing array_merge() : usage variations ***\n";
+
+$val1 = 'foo';
+$val2 = 'bar';
+$val3 = 'baz';
+
+$arr1 = array(&$val1, &$val2, &$val3);
+$arr2 = array('key1' => 'val1', 'key2' => 'val2', 'key3' => 'val3');
+
+echo "\n-- Merge an array made up of referenced variables to an assoc. array --\n";
+var_dump(array_merge($arr1, $arr2));
+var_dump(array_merge($arr2, $arr1));
+
+$val2 = 'hello world';
+
+echo "\n-- Change \$val2 --\n";
+var_dump(array_merge($arr1, $arr2));
+var_dump(array_merge($arr2, $arr1));
+
+echo "\n-- Merge an array and a reference to the first array --\n";
+var_dump(array_merge($arr2, &$arr2));
+
+echo "Done";
+?>
+
+--EXPECTF--
+*** Testing array_merge() : usage variations ***
+
+-- Merge an array made up of referenced variables to an assoc. array --
+array(6) {
+  [0]=>
+  &string(3) "foo"
+  [1]=>
+  &string(3) "bar"
+  [2]=>
+  &string(3) "baz"
+  ["key1"]=>
+  string(4) "val1"
+  ["key2"]=>
+  string(4) "val2"
+  ["key3"]=>
+  string(4) "val3"
+}
+array(6) {
+  ["key1"]=>
+  string(4) "val1"
+  ["key2"]=>
+  string(4) "val2"
+  ["key3"]=>
+  string(4) "val3"
+  [0]=>
+  &string(3) "foo"
+  [1]=>
+  &string(3) "bar"
+  [2]=>
+  &string(3) "baz"
+}
+
+-- Change $val2 --
+array(6) {
+  [0]=>
+  &string(3) "foo"
+  [1]=>
+  &string(11) "hello world"
+  [2]=>
+  &string(3) "baz"
+  ["key1"]=>
+  string(4) "val1"
+  ["key2"]=>
+  string(4) "val2"
+  ["key3"]=>
+  string(4) "val3"
+}
+array(6) {
+  ["key1"]=>
+  string(4) "val1"
+  ["key2"]=>
+  string(4) "val2"
+  ["key3"]=>
+  string(4) "val3"
+  [0]=>
+  &string(3) "foo"
+  [1]=>
+  &string(11) "hello world"
+  [2]=>
+  &string(3) "baz"
+}
+
+-- Merge an array and a reference to the first array --
+array(3) {
+  ["key1"]=>
+  string(4) "val1"
+  ["key2"]=>
+  string(4) "val2"
+  ["key3"]=>
+  string(4) "val3"
+}
+Done