21 December, 2020

Convert tree structure into flat array in php

Programing Coderfunda December 21, 2020 No comments

    1. Fetching data from database and converting it into tree
       structure my array looks like this.
    <?php
        array(1) {
        [6]=>
        array(1) {
            ["sub_id"]=>
            array(3) {
            [15]=>
            array(1) {
                ["sub_id"]=>
                array(0) {
                }
            }
            [16]=>
            array(1) {
                ["sub_id"]=>
                array(0) {
                }
            }
            [21]=>
            array(1) {
                ["sub_id"]=>
                array(0) {
                }
            }
            }
        }
        }
    ?>

    But i want flat array of only keys array{6,15,16,21}

     Answer : I have created a function for your output. Please try this.
    <?php
        $result = get_elements($array);

        function get_elements($array) {
            $result = array();
            foreach($array as $key => $row) {
                $result[] = $key;
                if(count($row['sub_id']) > 0) {
                    $result = array_merge($result,get_elements($row['sub_id']));
                }
            }
            return $result;
        }
    ?>

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