Self calling array return php [duplicate]

Question

i am writing a module that sorts through categories and returns me the lowest possible subcategory.

private function getChild($array){
    foreach($array as $item){
        if(is_array($item)){
            $this->getChild($item);
        } else {
            array_push($this->catsToReturn, $item);
        }
    }
}

So my actual issue and question is why can't i return value in else enclosure? I would like to return $item and push that value to array, that would give me a better code readability, since now i have

$this->getChild($this->postCategories);

Hanging randomly in my code.

The strange and new thing for me is that i can echo the value but i can't return it, i know it's an issue with scope, but can't find any info on how to solve it.

Just wanted to know how to improve this.

Cheers

Acknowledgement of commonality of incorrectly implemented recursive techniques: Seeking Canonical: Non-returning PHP Recursion — mickmackusa
– mickmackusa ♦, Commented Apr 17, 2024 at 4:07
Additional dupes: PHP: Return an array from recursive function and PHP recursive function bug? and Recursive function behaves unexpected and PHP getting all files into array issue and PHP recursive function for printing files and directories is not working — mickmackusa
– mickmackusa ♦, Commented Apr 17, 2024 at 4:15
and Getting nth-children ids recursively using function (php) and Folder recursion: when to return? and PHP recursive function inside foreach loop is adding up previous data within next loop — mickmackusa
– mickmackusa ♦, Commented Apr 17, 2024 at 4:17
and Php function not returning array values and PHP: Function not returning Array — mickmackusa
– mickmackusa ♦, Commented Apr 17, 2024 at 5:59

mighty_dev · Accepted Answer · 2020-01-23 07:43:41Z

0

You could change your code by adding $item in an array and doing an array_merge to take results from subsequent calls.

<?php

private function getChild($array){
    $result = [];
    foreach($array as $item){
        if(is_array($item)){
            $result = array_merge($result,$this->getChild($item));
        } else {
            $result[] = $item;
        }
    }

    return $result;
}

From wherever you are calling in your class, you can just do

$this->catsToReturn = $this->getChild($array)

answered Jan 23, 2020 at 7:43

mighty_dev

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