Unset specific property of JSON in PHP

Question

JSON

{
 "pages":{
   "index.php":{
      "status":"enabled",
      "theme":"dark",
      "identifier":"KMS"
  },
   "google.php":{
      "status":"enabled",
      "theme":"dark",
      "identifier":"KMS"
  },
   "doodle.php":{
      "status":"disabled",
      "theme":"light",
      "identifier":"transact"
   }
 }
}

In my PHP code I write

$jsona = file_get_contents("../pages.json");
$jsonb = json_decode($jsona,true);  
$data = $jsonb['pages'];

Now if I want to delete the property "index.php" I write unset($data["index.php"] and then I write

file_put_contents("../pages.json",json_encode($data));

Though after going to my JSON file it deletes "pages"

actual outcome

{"google.php":{"status":"enabled","theme":"dark","identifier":"KMS"},"doodle.php":{"status":"disabled","theme":"light","identifier":"transact"}}

I need to just unset a specific child property of pages. Such as "google.php" or "doodle.php". I checked what is being posted as $data[$page] and it is the specific element. So why is it unsetting pages and leaving the rest of the properties?

It's not unsetting pages, you're just not serializing that part... Try json_encode(array("pages"=>$data)) — ahruss
– ahruss, Commented Jul 21, 2014 at 4:18

user229044 · Accepted Answer · 2014-07-21 04:19:27Z

2

Don't set $data to $jsonb['pages']. That's specifically setting your $data variable to a sub-section of your overall object.

Just use unset($jsonb['pages']['index.php']).

answered Jul 21, 2014 at 4:19

user229044♦

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4 Comments

EasyBB Over a year ago

Ok I'll try that out.

EasyBB Over a year ago

Alrighty so that worked. Why did setting $data = $jsonb['pages'] mess it up?

user229044 Over a year ago

Because you were "cropping" away the outer-most object. If I have x = { a: 'b'}, and use y = x['a'], y has lost the outer-most object, and is now just the string 'b'.

EasyBB Over a year ago

Ah ok. Well that explains it :D Thanks Meagar!

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