PHP multi-keyword search sorting

I used PHP to perform a simple word segmentation search for the sorting problem of multiple keywords in PHP. Basic functions have been implemented. But there is a small problem. I want to search results. The most matched records are listed first. For example. I searched for the keyword "Chinese people". after word segmentation, the keyword "China" and "people" were obtained. There were three records in the search results. ID1: PHP multi-keyword search sorting in id2.
I used PHP for a simple word segmentation search. Basic functions have been implemented. But there is a small problem.

I want to search results. The most matched records are listed first.

For example. I searched for the keyword "Chinese people". The result after word segmentation is "China", "people ',

There are three records in the search results.

ID1: We have a broad audience in China
ID2 People's Bank of China
People of ID3

I want to sort yes

ID2 People's Bank of China

ID1: We have a broad audience in China

People of ID3


How can this sort be achieved?

------ Solution --------------------
The weight is usually generated based on the search frequency. you can set the weight by yourself, just like the sorting field.
------ Solution --------------------
1. search all results
2. perform regular expression matching as needed. of course, you need to write the regular expression perfectly.