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@ 2018-02-04T17:49:12Z

<?php

$results = [
    "User_1" => [
        "Step_1" => "accepted",
        "Step_2" => "accepted",
        "Step_3" => "waiting"
    ],
    "User_2" => [
        "Step_1" => "waiting",
        "Step_2" => "accepted",
        "Step_3" => "accepted"
    ],
    "User_3" => [
        "Step_1" => "refused",
        "Step_2" => "refused",
        "Step_3" => "waiting"
    ]
];

$steps = [];
$status = [];

foreach ($results as $result) {
    foreach ($result as $key => $r) {
        if (!array_key_exists($key, $steps)) {
            $steps[$key] = [];
        }
        if (!array_key_exists($r."Sum", $steps[$key])) {
            $steps[$key][$r."Sum"] = 0;
        }
        $steps[$key][$r."Sum"]++;
        $status[] = $r;
    }
}

foreach (array_unique($status) as $au) {
    foreach ($steps as &$step) {
        if (!array_key_exists($au."Sum", $step)) {
            $step[$au."Sum"] = 0;
        }
    }
}

print_r($steps);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [Step_1] => Array ( [acceptedSum] => 1 [waitingSum] => 1 [refusedSum] => 1 ) [Step_2] => Array ( [acceptedSum] => 2 [refusedSum] => 1 [waitingSum] => 0 ) [Step_3] => Array ( [waitingSum] => 2 [acceptedSum] => 1 [refusedSum] => 0 ) )

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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