Detailed explanation of how to solve ajax+php Chinese garbled characters_PHP tutorial

If Chinese is submitted using a form, garbled characters will not appear, but if submitted using ajax, garbled characters will appear. What is the reason for this?

My understanding is that when I write source code, I usually use Notepad to write it. When saving, I use ANSI encoding by default. There is no "" or "header('Content-Type:text/html;charset=UTF-8');" specifies the web page encoding, so When displayed in the browser, its encoding is identified as "GB2312". When the frontend transmits data to the backend, if you use a form to submit, the frontend and backend will use "GB2312" encoding to communicate, and there will be no garbled characters; if you use ajax to submit, ajax will convert the data encoding to be sent from "GB2312" in the frontend. into "UTF-8" and then pass it to the backend, and then treat the received data returned by the backend as "UTF-8" and convert it into "GB2312" before displaying it on the frontend page. In this way, garbled characters are generated.
As shown in the picture:


So to solve the garbled code, the data encoding conversion needs to be performed in the background. The data received in the background uses PHP's mb_convert_encoding("data to be converted","gb2312 ","UTF-8") is converted and stored in the database. The Chinese data returned from the background to the front desk must also be converted using mb_convert_encoding("data to be returned", "UTF-8", "gb2312") and returned.

http://www.bkjia.com/PHPjc/327519.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/327519.htmlTechArticleChinese If you use a form to submit, there will be no garbled characters, but if you use ajax to submit, there will be garbled characters. What is this? The reason? My understanding is that when I write source code, I usually use Notepad to write...