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@ 2016-06-08T01:21:04Z

<?php
class Average{ 
    var $samples; //配列

    function Average(){ 
      $this->samples = array(); 
    }

    //追加 
    function add($value){ 
      $this->samples[sizeof($this->samples)] = $value; 
    }

    //配列件数表示 
    function countValues(){ 
      return sizeof($this->samples); 
    }

    //最大値 
    function getMax(){ 
      $max = 0; 
      foreach ($this->samples as $value) { 
        if ($max < $value) { 
          $max = $value; 
        } 
      } 
      return $max; 
    }

    //平均値 
    function getAverage(){ 
     if(0 == sizeof($this->samples)){ 
        return 0; 
      } 
      $sum = 0; 
      foreach ($this->samples as $value) { 
        $sum += $value; 
      } 
      return $sum / sizeof($this->samples); 
    } 
} 
$avg = new Average; 
for ($i=1; $i <=10 ; $i++) { 
  $avg->add($i); 
} 
echo $avg->getAverage();

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught TypeError: sizeof(): Argument #1 ($value) must be of type Countable|array, null given in /in/fXAdW:11 Stack trace: #0 /in/fXAdW(44): Average->add(1) #1 {main} thrown in /in/fXAdW on line 11
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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