Loop through array in PHP, decode JSON found in files of the same name as the values and assign the decoded JSON to properties

Question

I'm sorry about the complicated title - it's hard to explain my situation.

This is json/Egg.json:

{"1":{"name":"Egg"}}

This is index.php:

error_reporting(E_ALL);
class Test {

    public $arrEgg;
    public $arrTypes = array("Egg");

    public function __construct() {
        foreach($this->arrTypes as $strType) {
            if(file_exists("json/$strType.json"))
                $this->{'arr' . $strType} = json_decode(file_get_contents("json/$strType.json"), true);
            else
                echo "File json/$strType.json not found!";
         }
     }
 }

$test = new Test();
echo $test->arrEgg[1]['name']; // I've also tried $test->arrEgg['1']['name']

When I run index.php, there is no output. This is what I want it to output:

Egg

Answer 1

Try this:

<?php

class Test {

    public $arrEgg;
    public $arrTypes = array("Egg");

    public function __construct() {
        foreach($this->arrTypes as $strType) {
            if(file_exists("json/$strType.json"))
                $this->{'arr' .$strType} = json_decode(file_get_contents("json/$strType.json"), true);
            else
                echo "File json/$strType.json not found!";
         }
     }
 }

$test = new Test();
echo $test->arrEgg[0][1]['name'];

Output: Egg

Since you want to put data in the $arrEgg property, you'll want to append the $strType, such as $this->{'arr' .$strType}. NOT with $this->arr{$strType}.

Your JSON is nested, so you'll still need to access it via [0][1]['name'], unless you change your JSON to be: {"1":{"name":"Test"}}.

Answer 2

You would parse it like that:

PHP

$json = '[{"1":{"name":"Egg"}}]';
$data =  json_decode($json);
echo $data[0]->{"1"}->{"name"};

Output:

egg

DEMO