解决php中json_decode的异常JSON_ERROR_CTRL_CHAR (json_last_error = 3)

https://www.cnblogs.com/sanshuiqing/p/6022619.html

该字符中含了ASCII码ETB控制符，即x17导致json解析失败 （截图中显示ETB是因为用了Sublime text2）

解决方法如下：去掉0-31的控制符再进行decode

$result = "json格式字符串如图";
$result = preg_replace('/[x00-x1F]/','', $result);
$result = json_decode($result);