外部json api提供unsanitized字符（SublimeText中的'DLE'）失败php json_decode

I've been using an API for quite some time, without any issues. It gives a list of visitors and the keywords they've been using to land on the site. Suddenly, the script failed. After diving into it, this is caused by a visitor search string containing an invalid character, which failed json_decode:I've been using an API for quite some time, wit