错误json_decode返回NULL

Question

i get post arg :

//var_dump($_POST['arg']);

{\"username\":\"demo\",\"password\":\"demo\",\"language\":\"7\",\"remember\":\"1\",\"recaptcha_response_field\":\"not torkedSe\",\"recaptcha_challenge_field\":\"03AHJ_VutYReMoMIpG755a_BDrIBquklWRSpf0OmMm_HGaIxCwRH1DFwXU2zdSTEprqGi66rAMd0LaewbcNK12Iir2DQTGAA-DzJZ_jjQQ0WP2JLoG3ANr0HdV3glmovv0B67nqejAj01FrtJA3SaulnTh5q6WwttshJnjBKitI6Np1gejMhIwXQo\"}

but when i get json_decode , i get NULL :

$Param = json_decode($_POST['arg'], true);

//var_dump($Param); return NULL

i also check on errors:

var_dump($Param,
$error === JSON_ERROR_NONE,
$error === JSON_ERROR_DEPTH,
$error === JSON_ERROR_STATE_MISMATCH,
$error === JSON_ERROR_CTRL_CHAR,
$error === JSON_ERROR_SYNTAX,
$error === JSON_ERROR_UTF8);

and get:

NULL
bool(false)
bool(false)
bool(false)
bool(false)
bool(false)
bool(false)

Tell me please where error?

Answer 1

You have to remove backslashes from string before parsing.

Also check what json_last_error() will return. It should help you in the future.

You said that it's problem with your new server. Check get_magic_quotes_gpc() . If it's true, you've found problem.