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@ 2020-08-11T15:15:49Z

<?php

$sqlRows = [];
$sqlRows[] = ['id' => 1,'depart_kode' => '001', 'depart_task' => 'task', 'value' => 'value'];
$sqlRows[] = ['id' => 2,'depart_kode' => '001.12', 'depart_task' => 'task', 'value' => 'value'];
$sqlRows[] = ['id' => 3,'depart_kode' => '001.452', 'depart_task' => 'task', 'value' => 'value'];
$sqlRows[] = ['id' => 4,'depart_kode' => '002.914', 'depart_task' => 'task', 'value' => 'value'];
$sqlRows[] = ['id' => 5,'depart_kode' => '002', 'depart_task' => 'task', 'value' => 'value'];
$sqlRows[] = ['id' => 6,'depart_kode' => '003', 'depart_task' => 'task', 'value' => 'value'];


$departs = [];
foreach ($sqlRows as $row) {
    $departKey = substr($row['depart_kode'], 0, 3);
    
    if (!array_key_exists($departKey, $departs)) {
        $departs[$departKey] = [];
    }
    
    $departs[$departKey][] = $row['depart_kode'];
}

var_dump($departs);

Output for git.master, git.master_jit, rfc.property-hooks: array(3) { ["001"]=> array(3) { [0]=> string(3) "001" [1]=> string(6) "001.12" [2]=> string(7) "001.452" } ["002"]=> array(2) { [0]=> string(7) "002.914" [1]=> string(3) "002" } ["003"]=> array(1) { [0]=> string(3) "003" } }

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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