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@ 2015-04-18T14:12:28Z

<?php

class ReportController
{
    protected $source;
    protected $data;

    public function __construct(array $source, $dataObject = null, \Closure $transformer = null)
    {
        $this->source = $source;
        $this->data = ($dataObject) ? [] : $dataObject;

        $this->transform($transformer);
    }

    public function transform(\Closure $transformer = null)
    {
        array_walk($this->source, $transformer);
    }
    
    public function getData() {
        return $this->data;
    }
}

$source = [
    ['type'=>'open'],
    ['type'=>'closed'],
    ['type'=>'pending'],
    ['type'=>'accepted']
];

$transformer = function($ticket, $key) {
    (isset($this->data[$ticket['type']]))? $this->data[$ticket['type']]++: $this->data[$ticket['type']]=1;
};

$report = new ReportController($source);

var_dump($report->getData());

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught TypeError: array_walk(): Argument #2 ($callback) must be a valid callback, no array or string given in /in/lAhIs:18 Stack trace: #0 /in/lAhIs(18): array_walk(Array, NULL) #1 /in/lAhIs(13): ReportController->transform(NULL) #2 /in/lAhIs(37): ReportController->__construct(Array) #3 {main} thrown in /in/lAhIs on line 18
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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