hphp/test/zend/good/tests/lang/foreachLoopIteratorAggregate.001.php

   1 <?php
   2 class EnglishMealIterator implements Iterator {
   3         private $pos=0;
   4         private $myContent=array("breakfast", "dinner", "tea");
   5
   6         public function valid() {
   7                 global $indent;
   8                 echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
   9                 return $this->pos < count($this->myContent);
  10         }
  11
  12         public function next() {
  13                 global $indent;
  14                 echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
  15                 $this->pos++;
  16         }
  17
  18         public function rewind() {
  19                 global $indent;
  20                 echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
  21                 $this->pos=0;
  22         }
  23
  24         public function current() {
  25                 global $indent;
  26                 echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
  27                 return $this->myContent[$this->pos];
  28         }
  29
  30         public function key() {
  31                 global $indent;
  32                 echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
  33                 return "meal " . $this->pos;
  34         }
  35
  36 }
  37
  38 class FrenchMealIterator implements Iterator {
  39         private $pos=0;
  40         private $myContent=array("petit dejeuner", "dejeuner", "gouter", "dinner");
  41
  42         public function valid() {
  43                 global $indent;
  44                 echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
  45                 return $this->pos < count($this->myContent);
  46         }
  47
  48         public function next() {
  49                 global $indent;
  50                 echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
  51                 $this->pos++;
  52         }
  53
  54         public function rewind() {
  55                 global $indent;
  56                 echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
  57                 $this->pos=0;
  58         }
  59
  60         public function current() {
  61                 global $indent;
  62                 echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
  63                 return $this->myContent[$this->pos];
  64         }
  65
  66         public function key() {
  67                 global $indent;
  68                 echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
  69                 return "meal " . $this->pos;
  70         }
  71
  72 }
  73
  74
  75 Class EuropeanMeals implements IteratorAggregate {
  76
  77         private $storedEnglishMealIterator;
  78         private $storedFrenchMealIterator;
  79
  80         public function __construct() {
  81                 $this->storedEnglishMealIterator = new EnglishMealIterator;
  82                 $this->storedFrenchMealIterator = new FrenchMealIterator;
  83         }
  84
  85         public function getIterator() {
  86                 global $indent;
  87                 echo "$indent--> " . __METHOD__  . "\n";
  88
  89                 //Alternate between English and French meals
  90                 static $i = 0;
  91                 if ($i++%2 == 0) {
  92                         return $this->storedEnglishMealIterator;
  93                 } else {
  94                         return $this->storedFrenchMealIterator;
  95                 }
  96         }
  97
  98 }
  99
 100 $f = new EuropeanMeals;
 101 var_dump($f);
 102
 103 echo "-----( Simple iteration 1: )-----\n";
 104 foreach ($f as $k=>$v) {
 105         echo "$k => $v\n";
 106 }
 107 echo "-----( Simple iteration 2: )-----\n";
 108 foreach ($f as $k=>$v) {
 109         echo "$k => $v\n";
 110 }
 111
 112
 113 $indent = " ";
 114 echo "\n\n\n-----( Nested iteration: )-----\n";
 115 $count=1;
 116 foreach ($f as $k=>$v) {
 117         echo "\nTop level "  .  $count++ . ": \n";
 118         echo "$k => $v\n";
 119         $indent = "     ";
 120         foreach ($f as $k=>$v) {
 121                 echo "     $k => $v\n";
 122         }
 123         $indent = " ";
 124 }
 125
 126
 127 ?>
 128 ===DONE===