Looping through array in PHP returned Object of class stdClass could not be converted to string

Question

I am sending an array over HTTP POST to backend API which is PHP.

js

var form_data = [];
for (var k = 0; k < $scope.Tablelist.length; k++){
  if($scope.Tablelist[k].selected == true){
    var id = $scope.Tablelist[k].id;
    var docno = $scope.Tablelist[k].quote_no;
    form_data.push({id: id, docno:docno})
  }
}
if(form_data.length>0){
  $http({
    method: 'POST',
    url: "api/purchase/purchase.php",
    data: {
      modul: 'PRICE',
      action: 'delete',
      form_data: form_data,
    },
    headers: {
      'Content-Type': 'application/x-www-form-urlencoded',
    }
  })

PHP

$form_data = (array)$request->form_data;
foreach ($form_data as $key => $value) {
     echo "Key: $key; Value: $value";
}

it gave me an error Object of class stdClass could not be converted to string.

I am trying to get the value of id and docno of each array.

How can i do that?

var_dump($form_data)

"array(3) {↵ [0]=>↵ object(stdClass)#3 (2) {↵ ["id"]=>↵ string(1) "6"↵ ["docno"]=>↵ string(5) "test4"↵ }↵ [1]=>↵ object(stdClass)#4 (2) {↵ ["id"]=>↵ string(1) "7"↵ ["docno"]=>↵ string(5) "test3"↵ }↵ [2]=>↵ object(stdClass)#5 (2) {↵ ["id"]=>↵ string(1) "4"↵ ["docno"]=>↵ string(5) "test2"↵ }↵}↵"

var_dump($request->form_data)

"array(3) {↵ [0]=>↵ object(stdClass)#3 (2) {↵ ["id"]=>↵ string(1) "6"↵ ["docno"]=>↵ string(5) "test4"↵ }↵ [1]=>↵ object(stdClass)#4 (2) {↵ ["id"]=>↵ string(1) "7"↵ ["docno"]=>↵ string(5) "test3"↵ }↵ [2]=>↵ object(stdClass)#5 (2) {↵ ["id"]=>↵ string(1) "4"↵ ["docno"]=>↵ string(5) "test2"↵ }↵}↵"

can you share the var_dump or print_r of $form_data or $request->form_data? — Murad Hasan
– Murad Hasan, Commented May 18, 2016 at 3:23
Your $value is not a string. $value->docno and $value->id will work. — Sibiraj PR
– Sibiraj PR, Commented May 18, 2016 at 3:32

Murad Hasan · Accepted Answer · 2016-05-18 03:55:05Z

1

Remember one things, The type casting of like this never convert the inner Object. So you need to access them using the -> sign.

And your $value is also an array you can't echo it.

From your var_dump of objects, you can notice that the inner array looks an object not array. So i suggest to use this as object.

Important: You can encode as json the form_data in your JavaScript code and in PHP just decode with true properties so that you can get an associative array.

As per your requirement, I am trying to get the value of id and docno of each array.

$form_data = (array) $request->form_data;
foreach ($form_data as $key => $value) {
    echo "Key:".$key;
    echo $value->docno." and ".$value->id;
}

Try to access the inner array as object or again type case it.

Note: Also you can use get_object_vars for type case an object to an array. More details

edited May 18, 2016 at 3:55

answered May 18, 2016 at 3:32

Murad Hasan

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4 Comments

Joseph Over a year ago

Thanks for the explanation, i am understanding now together with answer from @Sibiraj PR

Joseph Over a year ago

after some consideration, i will mark this as helpful. i have learn much this answer including the answer from @SibirajPR

Joseph Over a year ago

ow, never know this feature before, thanks again, learn again. haha

Murad Hasan Over a year ago

As per your requirement, I update my answer. Actually i did the main part for your by using print_r.

Sibiraj PR · Accepted Answer · 2016-05-18 03:41:17Z

1

You can try like this.

$form_data = (array)$request->form_data;
foreach ($form_data as $key => $value) {
 echo "Key: $value->id; Value: $value->docno";
}

answered May 18, 2016 at 3:41

Sibiraj PR

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1 Comment

Joseph Over a year ago

simple and to the point, in order to get the value, i have to access the object properties as explained by @Frayne Konok

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