ajax与php进度问题

Question

各位大神，前端通过ajax传送2千条数据给后端php，php处理插入数据库，每插入完成一条，向ajax返回完成的进度，怎么处理？
问题：只有一次返回结果给ajax，没有达到想要的结果，多次返回给ajax进度数据

Answer 1

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Answer 2

进度条都是假的进度，跟实际进度是不同步的，发送请求你就把进度到20%，一段时间到50%，ajax返回就设置进度为100%

Answer 3

如果是这样的话，那么就要发送2000次ajax请求了。能通过模拟的方式实现