hphp/test/zend/good/ext-standard-array/array_diff_variation7.php

   1 <?php
   2 /* Prototype  : array array_diff(array $arr1, array $arr2 [, array ...])
   3  * Description: Returns the entries of $arr1 that have values which are not
   4  * present in any of the others arguments.
   5  * Source code: ext/standard/array.c
   6  */
   7
   8 /*
   9  * Test how array_diff compares arrays that
  10  * 1. Contain referenced variables
  11  * 2. Have been referenced to each other
  12  */
  13
  14 echo "*** Testing array_diff() : usage variations ***\n";
  15 $a = 'a';
  16
  17 $arr1 = array ("&$a", 'b', 'c');
  18 $arr2 = array (1, 2, 3);
  19 echo "-- Basic Comparison --\n";
  20 var_dump(array_diff($arr1, $arr2));
  21 var_dump(array_diff($arr2, $arr1));
  22
  23 $a = 1;
  24
  25 echo "-- \$a changed --\n";
  26 var_dump(array_diff($arr1, $arr2));
  27 var_dump(array_diff($arr2, $arr1));
  28
  29
  30 $arr2 = &$arr1;
  31 echo "-- Arrays referenced to each other --\n";
  32 var_dump(array_diff($arr1, $arr2));
  33 var_dump(array_diff($arr2, $arr1));
  34
  35
  36 $arr1 = array('x', 'y', 'z');
  37 echo "-- \$arr1 changed --\n";
  38 var_dump(array_diff($arr1, $arr2));
  39 var_dump(array_diff($arr2, $arr1));
  40
  41
  42 echo "Done";
  43 ?>