(PHP 5 >= 5.5.0, PHP 7)
json_last_error_msg — Returns the error string of the last json_encode() or json_decode() call
Returns the error string of the last json_encode() or json_decode()
call, which did not specify JSON_THROW_ON_ERROR
.
This function has no parameters.
Returns the error message on success, "No error" if no
error has occurred, or FALSE
on failure.