由JS发送的PHP 7.1解码表情符号

I've sent a query string like this by JS to a PHP 7.1 app

?com=item&title=Hello%uD83D%uDE99

and should get

Hello

Added this line:

this.queryText = this.queryText.replace(/\%(u[0-9a-f]{4})/ig, '\\$1');

before

xr.send(this.queryText);
this.span = null;

in JsHttpRequest.js:422 to fix query string

ThanX to all