iterate through json_encode array in PHP

Question

i'm having problem on how to iterate in the array in json_encode.

I do ajax POST, in where i have a looping code that do "array push" in jQuery, something like this:

 $(this).closest('tr.header').nextUntil('.header').each(function(){
            i++;
            var forms="<form method='POST'>"+$(this).html()+'</form>';
            data.push($(forms).serializeArray());           
         });

So when i pass this to my controller/ other page, i do this:

  $dataList = json_encode($this->input->post("form"));  

  echo $dataList ;

And the output is:

 [
   [{"name":"category_1", "values":"packages"},
    {"name":"PK_1", "values": "1"}
   ],
   [{"name":"category_2", "value":"products"},
    {"name":"PK_2", "value": "3"}
   ]
 ]

I have tried to do :

  foreach ($dataList as $data) {                            
     echo $data . "\n";                                 
  }

But only give me error on foreach.

Thanks in advance.

You need to decode that: use json_decode($dataList)

aldrin27
– aldrin27

2015-09-19 08:23:18 +00:00
Commented Sep 19, 2015 at 8:23 — aldrin27
– aldrin27, Commented Sep 19, 2015 at 8:23
In my 2nd statement, i already did the json_encode.

user3651476
– user3651476

2015-09-19 08:25:28 +00:00
Commented Sep 19, 2015 at 8:25 — user3651476
– user3651476, Commented Sep 19, 2015 at 8:25
Sorry for that. Decode is what I mean

aldrin27
– aldrin27

2015-09-19 08:25:52 +00:00
Commented Sep 19, 2015 at 8:25 — aldrin27
– aldrin27, Commented Sep 19, 2015 at 8:25

aldrin27 · Accepted Answer · 2015-09-19 08:53:05Z

3

Use json_decode()function to get your data as an array then foreach your data.

  $a = '[
    [{"name":"category_1", "values":"packages"},
     {"name":"PK_1", "values": "1"}
    ],
    [{"name":"category_2", "value":"products"},
     {"name":"PK_2", "value": "3"}
    ]
  ]';
    echo '<pre>';
    $res = json_decode($a, true);

    $newArr = [];
    foreach($res as $data => $val)
    {
       foreach($val as $key2 => $val2)
       {
           $newArr[] = $val2;
       }
    }

    foreach($newArr as $key => $val)
    {
        echo 'Name = ' . $val['name'] . ' Values = ' . $val['value'] . '<br/>';
    }

edited Sep 19, 2015 at 8:53

answered Sep 19, 2015 at 8:24

aldrin27

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4 Comments

user3651476 Over a year ago

Oh. My bad. Looks okay now . then how can i go through each items? Like the category_1, PK_1 >?

aldrin27 Over a year ago

Can I see the print_r($data)?

user3651476 Over a year ago

Array ( [0]=>Array ( [name]=>category_1 [value]=>packages ) [1]=>Array ( [name]=>PK_1 [value]=>1 ) ) Array ( [0]=>Array ( [name]=>category_2 [value]=>product ) [1]=>Array ( [name]=>PK_2 [value]=>2 ) )

user3651476 Over a year ago

Yup. This solve my problem. Thank you :) But the last line ' Values =' .$val['values'] . Should only $val['value'] ;

Suchit kumar · Accepted Answer · 2015-09-19 08:54:34Z

1

Just decode the string and loop through the created array.

  <?php 
$a = '[
    [{"name":"category_1", "values":"packages"},
     {"name":"PK_1", "values": "1"}
    ],
    [{"name":"category_2", "value":"products"},
     {"name":"PK_2", "value": "3"}
    ]
  ]';
    echo '<pre>';
    $res = json_decode($a, true);

    $newArr = array();
    foreach($res as $data => $val)
    {

        foreach($val as $k=>$value){
            $value=array_values($value);
          echo 'Name => ' . $value[0] . ' Value => ' . $value[1] . '<br/>';
        }

    }


?>

answered Sep 19, 2015 at 8:54

Suchit kumar

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Comments

Haseeb · Accepted Answer · 2015-09-19 09:45:54Z

1

for array output you need to decode it with json_decode()

here is sample code.

$encode_data = '[[{"name":"category_1", "values":"packages"},{"name":"PK_1", "values": "1"}],[{"name":"category_2", "value":"products"},{"name":"PK_2", "value": "3"}]]';

$dataAr = json_decode($encode_data , true);


foreach($dataAr as $data)
{   
    foreach($data as $value){
        $value=array_values($value);
        echo 'name => ' .$value[0] . ' value => ' .$value[1];
        echo "<br>";
    }

}

edited Sep 19, 2015 at 9:45

answered Sep 19, 2015 at 8:35

Haseeb

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4 Comments

user3651476 Over a year ago

How can i get through item, for example just the "category"?

Haseeb Over a year ago

@user3651476 what you want to get name or value ??

user3651476 Over a year ago

Both, cause i need this to be inserted in database. Thanks

user3651476 Over a year ago

Im having the problem of "trying to get property of non-object".

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