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  1. <?php
  2.  
  3.  
  4. class StringList implements ArrayAccess, IteratorAggregate
  5. {
  6.     protected $items = [];
  7.  
  8.     public function offsetSet($key, $value)
  9.     {
  10.         if (is_string($value)) {
  11.  
  12.             $key ? $this->items[$key] = $value : array_push($this->items, $value);
  13.  
  14.             return $this;
  15.         }
  16.  
  17.         throw new \UnexpectedValueException('Essa é uma lista que aceita somente string');
  18.     }
  19.  
  20.     public function offsetGet($key)
  21.     {
  22.         return $this->items[$key];
  23.     }
  24.  
  25.     public function offsetExists($key)
  26.     {
  27.         return isset($this->items[$key]);
  28.     }
  29.  
  30.     public function offsetUnset($key)
  31.     {
  32.         unset($this->items[$key]);
  33.     }
  34.  
  35.     public function getIterator()
  36.     {
  37.         return new ArrayIterator($this->items);
  38.     }
  39. }
  40.  
  41.  
  42. $list = new StringList;
  43.  
  44. $list[] = 'Wallace';
  45. $list[] = 'Bigown';
  46. $list[] = 'Denner Carvalho';
  47.  
  48. foreach ($list as $string) {
  49.     var_dump($string);
  50. }
Success #stdin #stdout 0.01s 52488KB
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Standard input is empty
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string(7) "Wallace"
string(6) "Bigown"
string(15) "Denner Carvalho"
https://ideone.com/uDv87p
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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