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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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