Decoding json in array , editing array and encoding in json - PHP

Question

I am newbee in php and trying to get json in array and wanna change key in that json below is my code :

   $json = json_decode(file_get_contents('all_json_files/jobs.json'), true); 
    foreach ($json as $key=>$row){
      foreach ( $row as $key=>$row){
         foreach ( $row as $key=>$row){
            foreach ($row as $key=>$row){
               if(strcmp($key,"security_block")==0)
                {
                       foreach ($row as $k=>$r){
                       if(strcmp($k,"job_payload_hash")==0)
                       {
                         $row[$k]['job_payload_hash']=$base64String;
                         print_r($row);
                       }
                }
              }
            }
         }
       }
    }
    print_r($json);

Issue is print_r($row); is updating properly but print_r($json); does not print the updated string .

json_encode and json_decode are your friends, those loops are crazy. — Varedis
– Varedis, Commented Jan 9, 2015 at 11:33
yes i know that things is i just want to chnage value of 'job_payload_hash' in my json @Varedis i-CONICA — KOTIOS
– KOTIOS, Commented Jan 9, 2015 at 11:43

Ja͢ck · Accepted Answer · 2015-01-09 11:51:24Z

3

If the key could appear anywhere, the answer is pretty simple:

function update_hash(&$item, $key, $base64String)
{
    if ($key == "job_payload_hash") {
        $item = $base64String;
    }
}

array_walk_recursive($json, 'update_hash', 'something');

Update

The structure is something different that previously assumed; while the above will work, probably the below is a more direct approach:

foreach (array_keys($json['jobs']) as $jobId) {
    $json['jobs'][$jobId]['job']['security_block']['job_payload_hash'] = 'something';
}

edited Jan 9, 2015 at 11:51

answered Jan 9, 2015 at 11:43

Ja͢ck

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Comments

Ahosan Karim Asik · Accepted Answer · 2015-01-09 11:46:54Z

0

You use $key & $row variable in multiple time. for this reason, value of $key is changed each time, so parent loop does not work..

You can use recursive function lik answer of @Ja͢ck .

answered Jan 9, 2015 at 11:46

Ahosan Karim Asik

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Comments

goldlife · Accepted Answer · 2015-01-09 11:34:36Z

-1

this is because you have to save not in variables you defined after => in a foreach. You have to store this in format:

$json[0][0] ... = $base64String;

OR

You have to add a new array like $result = array() before you write the foreach and then store it in $result.

answered Jan 9, 2015 at 11:34

goldlife

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2 Comments

Ja͢ck Over a year ago

Not sure why this was down voted, it's an answer in the right direction.

i-CONICA Over a year ago

Because it tries to fix awful code. The OP is clearly going in the wrong direction. So a good answer would suggest a better way of coding the above, not help fix someone's crap code.

i-CONICA · Accepted Answer · 2015-01-09 11:39:17Z

-1

Decode the JSON string using json_decode(), edit your resulting array, then use json_encode(); to return the array to a JSON encoded string.

Also, use array_key_exists() rather than comparing array key strings.

$array = json_decode($json);

if(array_key_exists("job_payload_hash", $array){
  $array["job_payload_hash"] = base64encode($var);
}

$json = json_encode($array);

edited Jan 9, 2015 at 11:39

answered Jan 9, 2015 at 11:34

i-CONICA

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2 Comments

Ja͢ck Over a year ago

This only observes a single dimension; the data that needs to be changed seems to be five levels deep.

i-CONICA Over a year ago

You're right, array_walk_recursive is better for this.

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