how to convert this string to an array?

Question

I'm trying to convert this array I create in JS to then used in my controller to used in a foreach and used the data of the array. I'm using the framework codeigniter.

Here where I create the array in my JS file.

function get_array(){
  var datos = []; // Array
  $("#tbl_esctructura tbody > tr").each(function() {

    var item = $(this).find('td:eq(1)').text();
    var cantidad = $(this).find('td:eq(4)').text();

    datos.push({
       "item": item,
       "cantidad": cantidad
    });
  });

  datos =  JSON.stringify(datos); 
  $.ajax({
        data: {
            'datos': datos
        },
        url: "<?php echo base_url() ?>Controller/data_from_array",
        type: 'POST',
        dataType : "json",
        success: function(response) {

        }
    });
}

the data I send to the controller look like this. [{"item":"1","cantidad":"2"},{"item":"2","cantidad":"4"}]

Now my controller PHP

public function data_from_array(){
   $data   =  $this->input->post('datos', TRUE);
   $items = explode(',', $data);
   var_dump($items);
   foreach ($items as $row) {
       echo  $row->item.'<br>';
   }
}

and the var_dump($items) this is the result

array(2) { [0]=> string(12) "[{"item":"1"" [1]=> string(16) ""cantidad":"1"}]" } }

And in this echo I get this error Message: Trying to get property 'item' of non-object

And I don't know what I'm doing wrong

Isn't datos still stringified?

Jacob
– Jacob

2020-02-18 12:08:02 +00:00
Commented Feb 18, 2020 at 12:08 — Jacob
– Jacob, Commented Feb 18, 2020 at 12:08

Akash lal · Accepted Answer · 2020-02-19 07:53:50Z

3

Looks like a standard JSON. Be sure to add true to json_decode function (second parameter) to return array instead of object.

$result = json_decode($data, true);

Have a look at JSON as this is a, nowadays, standard of data interchange for web and mobile apps and learn more about the function:

https://www.php.net/manual/en/function.json-decode.php

also look at its counterpart that will encode your arrays into JSON format:

https://www.php.net/manual/en/function.json-encode.php

edited Feb 19, 2020 at 7:53

Akash lal

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answered Feb 18, 2020 at 12:21

MaxT

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2 Comments

MoteCL Over a year ago

and in the echo $row->item; still getting this Message: Trying to get property 'item' of non-object

MaxT Over a year ago

this is not an object, meaning you need to access it as array i.e. foreach ($result as $row) { echo $row['item']; } . If you want to get array of objects then remove true from decode function.

Mehran · Accepted Answer · 2020-02-18 12:08:04Z

0

You can use this code as the explode return array, not an object.

public function data_from_array(){
  $data   =  $this->input->post('datos', TRUE);
  $items = explode(',', $data);
  var_dump($items);
   foreach ($items as $row) {
      echo  $row["item"].'<br>';
   }

answered Feb 18, 2020 at 12:08

Mehran

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Comments

qiAlex · Accepted Answer · 2020-02-18 12:13:30Z

0

there are two scenarios:

if you want to parse JSON object, then

$items = json_decode($data); // instead of $items = explode(',', $data);

if you want to treat data as a strings then

echo  $row[0].'<br>'; // instead of echo  $row->item.'<br>';

edited Feb 18, 2020 at 12:13

answered Feb 18, 2020 at 12:09

qiAlex

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1 Comment

MoteCL Over a year ago

Message: Cannot use object of type stdClass as array

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