convert json to multi level array

Question

convert REST response in JSON to PHP arrray

Set the following up but got error =

Trying to get property of non-object in C:......

our JSON looks like

{
    "craneIDs": [{
        "craneID": "R01"
    }, {
        "craneID": "R02"
    }, {
        "craneID": "R04"
    }, {
        "craneID": "R08"
    }, {
        "craneID": "R09"
    }, {
        "craneID": "R10"
    }, {
        "craneID": "R16"
    }, {
        "craneID": "TC01"
    }, {
        "craneID": "T06"
    }, {
        "craneID": "T08"
    }, {
        "craneID": "T08/2"
    }, {
        "craneID": "T12"
    }]
}

after

$craneids_url   = 'http://...........';
$craneids_json  = file_get_contents($craneids_url);
$craneids_array = json_decode($craneids_json, true);
$i              = 0;
/* Error on following line */
while ($craneids_array->{'craneIDs'}[$i]) {
    print_r($craneids_array->{'craneIDs'}[$i]->{'craneID'});
    echo "<br />";
    $i++;
}

used foreach loop instead while loop. – Jimit H. Aug 22 '19 at 09:27 — Jimit H., Aug 22 '19 at 09:27

Rahul · Answer 1 · 2019-08-22T09:33:27.443

You can directly write without string,

// true return raw array but your syntax is for object
$craneids_array = json_decode($craneids_json);
$i =0;
// run while until there is value for craneIDs
while (isset($craneids_array->craneIDs[$i])) {
    print_r($craneids_array->craneIDs[$i]->craneID);
    echo "<br />";
    $i++;
}

Demo

Output:-

R01<br />R02<br />R04<br />R08<br />R09<br />R10<br />R16<br />TC01<br />T06<br />T08<br />T08/2<br />T12<br />

score 0 · Answer 2 · answered Aug 22 '19 at 09:35

0

With json_decode($craneids_json, true); you get an array.

Try:

foreach ($craneids_array['craneIDs'] as $craneIDs) {
        print_r($craneIDs['craneID']);
        echo "<br />";
    }

answered Aug 22 '19 at 09:35

Manzolo

1,909
12
13

score 0 · Answer 3 · answered Aug 22 '19 at 09:43

The problem with the code you provided is that craneIDs is not a property of the object returned by json_decode, but it is a key. The following works:

//Replace $craneids_array->{'craneIDs'} with $craneids_array['craneIDs']

while ($craneids_array['craneIDs'][$i]) { 
    print_r($craneids_array['craneIDs'][$i]['craneID']);
    echo "<br />";
    $i++;
}

Working example here

convert json to multi level array

3 Answers3