hphp/test/zend/good/ext/standard/tests/array/usort_object2.php

   1 <?hh
   2 /* Prototype  : bool usort(&array $array_arg, string $cmp_function)
   3  * Description: Sort an array by values using a user-defined comparison function
   4  * Source code: ext/standard/array.c
   5  */
   6
   7 /*
   8  * Pass an array of objects which are either:
   9  * 1. Empty
  10  * 2. Static
  11  * 2. Inherited
  12  * to test behaviour of usort()
  13  */
  14
  15 function cmp_function($value1, $value2)
  16 {
  17   if($value1 == $value2) {
  18     return 0;
  19   }
  20   else if($value1 > $value2) {
  21     return 1;
  22   }
  23   else
  24     return -1;
  25 }
  26
  27 // Class without any member
  28 class EmptyClass
  29 {
  30 }
  31
  32 // Class with static member
  33 class StaticClass
  34 {
  35   public static $static_value;
  36   public function __construct($value) {
  37     StaticClass::$static_value = $value;
  38   }
  39 }
  40
  41 // Abstract class
  42 abstract class AbstractClass
  43 {
  44   public $pub_value;
  45   public abstract function abstractMethod();
  46 }
  47
  48 // Child class extending abstract class
  49 class ChildClass extends AbstractClass
  50 {
  51   public $child_value = 100;
  52   public function abstractMethod() {
  53     $pub_value = 5;
  54   }
  55   public function __construct($value) {
  56     $this->child_value = $value;
  57   }
  58 }
  59 <<__EntryPoint>> function main(): void {
  60 echo "*** Testing usort() : object functionality ***\n";
  61
  62 // Testing uasort with StaticClass objects as elements of 'array_arg'
  63 echo "-- Testing usort() with StaticClass objects --\n";
  64 $array_arg = array(
  65   0 => new StaticClass(20),
  66   1 => new StaticClass(50),
  67   2 => new StaticClass(15),
  68   3 => new StaticClass(70),
  69 );
  70 var_dump( usort(inout $array_arg, fun('cmp_function')) );
  71 var_dump($array_arg);
  72
  73 // Testing uasort with EmptyClass objects as elements of 'array_arg'
  74 echo "-- Testing usort() with EmptyClass objects --\n";
  75 $array_arg = array(
  76   0 => new EmptyClass(),
  77   1 => new EmptyClass(),
  78   2 => new EmptyClass(),
  79   3 => new EmptyClass(),
  80 );
  81 var_dump( usort(inout $array_arg, fun('cmp_function')) );
  82 var_dump($array_arg);
  83
  84 // Testing uasort with ChildClass objects as elements of 'array_arg'
  85 echo "-- Testing usort() with ChildClass objects --\n";
  86 $array_arg = array(
  87   0 => new ChildClass(20),
  88   1 => new ChildClass(500),
  89   2 => new ChildClass(15),
  90   3 => new ChildClass(700),
  91 );
  92 var_dump( usort(inout $array_arg, fun('cmp_function')) );
  93 var_dump($array_arg);
  94 echo "===DONE===\n";
  95 }