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  1. <?php
  2.  
  3. class Foo {
  4.  
  5.   private $values;
  6.  
  7.   public function __construct() {
  8.  
  9.     $this->values = array();
  10.  
  11.   }
  12.  
  13.   public function addElement($key, $value) {
  14.  
  15.     $this->values[$key] = $value;
  16.  
  17.   }
  18.  
  19.   public function getValues() {
  20.  
  21.     return $values;
  22.  
  23.   }
  24.  
  25. }
  26.  
  27. $foo = new Foo();
  28. $foo->addElement("hello", "John Doe");
  29. $foo->getValues()["goodbye"] = "Jane Doe";
  30.  
  31. var_dump($foo);
Success #stdin #stdout #stderr 0.02s 52472KB
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stdin
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Standard input is empty
stdout
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object(Foo)#1 (1) {
  ["values":"Foo":private]=>
  array(1) {
    ["hello"]=>
    string(8) "John Doe"
  }
}
stderr
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PHP Notice:  Undefined variable: values in /home/ay5jBU/prog.php on line 21
https://ideone.com/S9YAV5
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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