- json_decode: documentation ( source)
- urldecode: documentation ( source)
- http_build_query: documentation ( source)
<?php
$res= json_decode('{"hash":"976d13764b75b598413c4f7f8beb0ce8acffa1481413645338","brandId":1,"password":"passpass","playerEmail":"9e707d5af19200cffe2fc5513a81fb55e6031124@test.com","secretKey":"197ec8b6fee809d5d08fbb8aa5f6bf08"}');
$url = urldecode(http_build_query($res));
print ($url);