hphp/test/zend/good/ext/standard/tests/array/array_diff_variation6.php

   1 <?hh
   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 that array_diff behaves as expected for comparing:
  10  * 1. the order of the array
  11  * 2. duplicate values
  12  * 3. duplicate key names
  13  */
  14 <<__EntryPoint>> function main(): void {
  15 echo "*** Testing array_diff() : usage variations ***\n";
  16
  17 $array_index = array('a', 'b', 'c', 0 => 'd', 'b');   //duplicate key (0), duplicate value (b)
  18 $array_assoc = array ('2' => 'c',   //same key=>value pair, different order
  19                       '1' => 'b',
  20                       '0' => 'a',
  21                       'b' => '3',   //key and value from array_index swapped
  22                       'c' => 2);    //same as above, using integer
  23
  24 var_dump(array_diff($array_index, $array_assoc));
  25 var_dump(array_diff($array_assoc, $array_index));
  26
  27 echo "Done";
  28 }