hphp/test/zend/good/ext/standard/tests/array/array_flip_variation5.php

   1 <?hh
   2 /* Prototype  : array array_flip(array $input)
   3  * Description: Return array with key <-> value flipped
   4  * Source code: ext/standard/array.c
   5 */
   6
   7 /*
   8 * Using different types of repeatitive keys as well as values for 'input' array
   9 */
  10 <<__EntryPoint>> function main(): void {
  11 echo "*** Testing array_flip() : 'input' array with repeatitive keys/values ***\n";
  12
  13 // array with numeric key repeatition
  14 $input = array(1 => 'value', 2 => 'VALUE', 1 => "VaLuE", 3.4 => 4, 3.4 => 5);
  15 var_dump( array_flip($input) );
  16
  17 // array with string key repeatition
  18 $input = array("key" => 1, "two" => 'TWO', 'three' => 3, 'key' => "FOUR");
  19 var_dump( array_flip($input) );
  20
  21 // array with bool key repeatition
  22 $input = array(true => 1, false => 0, TRUE => -1);
  23 var_dump( array_flip($input) );
  24
  25 // array with null key repeatition
  26 $input = array(null => "Hello", NULL => 0);
  27 var_dump( array_flip($input) );
  28
  29 // array with numeric value repeatition
  30 $input = array('one' => 1, 'two' => 2, 3 => 1, "index" => 1);
  31 var_dump( array_flip($input) );
  32
  33 //array with string value repeatition
  34 $input = array('key1' => "value1", "key2" => '2', 'key3' => 'value1');
  35 var_dump( array_flip($input) );
  36
  37 echo "Done";
  38 }