PHP JSon 如何读取以 JSon 格式接收的布尔值并在 PHP 上写入字符串

Question

I receive this JSON string from another site and I cannot modify what received from. The string is receive in $_POST and is :

[
    {
        "clientId":"17295c59-4373-655a-1141-994aec1779dc",
        "channel":"\/meta\/connect",
        "connectionType":"long-polling",
        "ext":{
            "fm.ack":false,
            "fm.sessionId":"22b0bdcf-4a35-62fc-3764-db4caeece44b"
        },
        "id":"5"
    }
]

I decode the JSON string with the following code :

$receive = json_decode(file_get_contents('php://input'));

And when I use print_r($receive) I get the following:

Array (
[0] => stdClass Object
    (
        [clientId] => 17295c59-4373-655a-1141-994aec1779dc
        [channel] => /meta/connect
        [connectionType] => long-polling
        [ext] => stdClass Object
            (
                [fm.ack] => 
                [fm.sessionId] => 22b0bdcf-4a35-62fc-3764-db4caeece44b
            )

        [id] => 5
    )
)

I can access and read all Array / Object with no problem :

$receive[$i]->clientId;
$receive[$i]->channel;
$connectionType = $receive[$i]->connectionType;
$receive[$i]->id;
$receive[$i]->ext->{'fm.sessionId'};

But {fm.ack} is empty

In the decoded JSON string, the false value is not between "" .

Is it possible to access and read the false value and convert it into string value instead?

Thank you for your helping !

Answer 1

you can use it like this, in JSON format when you evaluate false value it will give you blank , and when you evaluate true it will give you 1 .

$str = '[{"clientId":"17295c59-4373-655a-1141-994aec1779dc","channel":"\/meta\/connect","connectionType":"long-polling","ext":{"fm.ack":false,"fm.sessionId":"22b0bdcf-4a35-62fc-3764-db4caeece44b"},"id":"5"}]';

$arr = json_decode($str,true);

if($arr[0]['ext']['fm.ack'])    // suggested by **mario**
{
    echo "true";    
}
else {
    echo "false";   
}

Answer 2

I know there is already an answer to this but it may be worth noting that var_dump outputs Boolean values better it just has worse formatting IMO.

<pre>
    <?php
        print_r(array(true, false));
        var_dump(array(true, false));
    ?>
</pre>

Results in

Array
(
    [0] => 1
    [1] => 
)
array(2) {
  [0]=>
  bool(true)
  [1]=>
  bool(false)
}

Answer 3

It's a very simple. If you use js to generate and transfer json, pass your variable not in its pure form but: youBoolVar + 0 , then false will be 0, and true 1