balping / json-raw-encoder
Encode arrays to json with raw JS objects (eg. callbacks) in them
Requires
- php: >=7.0
Requires (Dev)
- phpunit/phpunit: ^7.1|^8.0|^9.0
This package is auto-updated.
Last update: 2024-10-27 22:10:17 UTC
README
Use this package to encode arrays to JSON with raw JS objects (eg. callbacks) in them.
Installation
composer require balping/json-raw-encoder
Usage
Suppose you need to pass a callback to a JSON object.
<?php
$array = [
'type' => 'cat',
'count' => 42,
'callback' => 'function(a){alert(a);}'
];
?>
<script>
let bar = <?php echo json_encode($array); ?>;
bar.callback('hello'); //error
</script>
However, the above array will be encoded as
{"type":"cat","count":42,"callback":"function(a){alert(a);}"}
On this object, you cannot call callback()
, as callback
is a string and not a function.
To get around this problem, use Raw
objects provided by this package:
<?php
use Balping\JsonRaw\Raw;
use Balping\JsonRaw\Encoder;
$array = [
'type' => 'cat',
'count' => 42,
'callback' => new Raw('function(a){alert(a);}')
];
?>
<script>
let bar = <?php echo Encoder::encode($array); ?>;
bar.callback('hello'); //prints hello
</script>
Now, the encoded JSON looks like this. Notice, that there are no quotation marks around the function.
{"type":"cat","count":42,"callback":function(a){alert(a);}}
Calling bar.callback()
now works, as callback
is a function and not a string.
Using with third party libraries
It is possible that the serialisation is done by a library (eg. Fractal), and not by your code, i.e. you cannot replace json_encode
with Encoder::encode()
.
In this case, you can still pass callbacks to JSON, by passing the encoded json and an array of all raw objects to Replacer::replace()
:
use Balping\JsonRaw\Raw;
use Balping\JsonRaw\Replacer;
$rawObjects = [];
$array = [
'type' => 'cat',
'count' => 42,
'callback' => $rawObjects[] = new Raw('function(a){alert(a);}')
];
// you cannot alter the behaviour of a third party encoder
$encoded = $thirdParty->jsonEncode($array);
echo Replacer::replace($encoded, $rawObjects);
Result:
{"type":"cat","count":42,"callback":function(a){alert(a);}}
License
This package is licensed under GPLv3.