Online PHP editor | rfc for QN4NP

@ 2019-12-23T12:44:26Z

<?php

$data = array(
    array
    (
        'category_id' => 20,
        'category_name' => 'Category 1',
        'main_category' => 0,
        'sub_categories' => array(
                array
                    (
                        'category_id' => 25,
                        'category_name' => 'Category 1.3',
                        'main_category' => 20,
                        'sub_categories' => [],
                    ),
                array
                    (
                        'category_id' => 26,
                        'category_name' => 'Category 1.4',
                        'main_category' => 20,
                        'sub_categories' => array
                            (
                                array
                                    (
                                        'category_id' => 30,
                                        'category_name' => 'Category 1.4.1',
                                        'main_category' => 26,
                                        'sub_categories' => []
                                    ),
                                array
                                    (
                                        'category_id' => 31,
                                        'category_name' => 'Category 1.4.2',
                                        'main_category' => 26,
                                        'sub_categories' => []
                                    )
                            )
                    ),
        )
    ),
    array
        (
            'category_id' => 19,
            'category_name' => 'Category 2',
            'main_category' => 0,
            'sub_categories' => []
        )
    );


function getChildren($data,$parents,&$result){
    foreach($data as $current_category){
        $temp = [];
        $temp['category_id'] = $current_category['category_id'];
        $new_cat_sequence =  array_merge($parents,[$current_category['category_name']]);
        $temp['category_name'] = implode(" -> ",$new_cat_sequence);
        $result[] = $temp;
        getChildren($current_category['sub_categories'],$new_cat_sequence,$result);
    }
}

$result = [];
getChildren($data,[],$result);

print_r($result);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => Array ( [category_id] => 20 [category_name] => Category 1 ) [1] => Array ( [category_id] => 25 [category_name] => Category 1 -> Category 1.3 ) [2] => Array ( [category_id] => 26 [category_name] => Category 1 -> Category 1.4 ) [3] => Array ( [category_id] => 30 [category_name] => Category 1 -> Category 1.4 -> Category 1.4.1 ) [4] => Array ( [category_id] => 31 [category_name] => Category 1 -> Category 1.4 -> Category 1.4.2 ) [5] => Array ( [category_id] => 19 [category_name] => Category 2 ) )

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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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