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@ 2017-07-13T12:53:23Z

<?php
$array = ["subject" => "1"];
$json = json_encode($array);

$decoded = json_decode($json);

$val = 0;
if (!isset($decoded->subjectt) || $decoded->subjectt === '') {
    $val = 5;
}


echo $val;

Output
Performance
VLD
References
Branches

json_decode: documentation ( source)
json_encode: documentation ( source)

preferences:dark modelive preview

38.76 ms | 402 KiB | 5 Q