hphp/test/slow/foreach_target_variables.php

   1 <?php
   2
   3 class Test {
   4     public $keyProp, $valProp;
   5     public static $staticKeyProp, $staticValProp;
   6 }
   7 class Test2 {
   8     public static $staticKeyProp, $staticValProp;
   9 }
  10
  11 // Target: Integer array keys
  12 $array = [1, 2, 3];
  13
  14 $a = [];
  15 foreach ($array as $a[0] => &$a[1]) {
  16     echo "$a[0] => $a[1],";
  17     $a[1] *= -1; // negate values
  18 }
  19 echo "\n";
  20
  21 $a = [];
  22 foreach ($array as $a[0] => $a[1]) {
  23     echo "$a[0] => $a[1],";
  24 }
  25 echo "\n";
  26
  27 // Target: Append to array
  28 $array = [1, 2, 3];
  29
  30 $i = 0;
  31 $a = [];
  32 foreach ($array as $a[] => &$a[]) {
  33     echo $a[$i+1], " => ", $a[$i], ",";
  34     $a[$i] *= -1; // negate values
  35     $i += 2;
  36 }
  37 echo "\n";
  38
  39 $i = 0;
  40 $a = [];
  41 foreach ($array as $a[] => $a[]) {
  42     echo $a[$i+1], " => ", $a[$i], ",";
  43     $i += 2;
  44 }
  45 echo "\n";
  46
  47 // Target: Non-static properties
  48 $array = [1, 2, 3];
  49
  50 $obj = new Test;
  51 foreach ($array as $obj->keyProp => &$obj->valProp) {
  52     echo "$obj->keyProp => $obj->valProp,";
  53     $obj->valProp *= -1; // negate values
  54 }
  55 echo "\n";
  56
  57 $obj = new Test;
  58 foreach ($array as $obj->keyProp => $obj->valProp) {
  59     echo "$obj->keyProp => $obj->valProp,";
  60 }
  61 echo "\n";
  62
  63 // Target: Static properties
  64 $array = [1, 2, 3];
  65
  66 foreach ($array as Test::$staticKeyProp => &Test2::$staticValProp) {
  67     echo Test::$staticKeyProp, " => ", Test2::$staticValProp, ",";
  68     Test2::$staticValProp *= -1; // negate values
  69 }
  70 echo "\n";
  71
  72 foreach ($array as Test2::$staticKeyProp => Test::$staticValProp) {
  73     echo Test2::$staticKeyProp, " => ", Test::$staticValProp, ",";
  74 }
  75 echo "\n";