php+txt 2-level linkage general query system v2023

php+txt 2-level linkage universal query system, generally suitable for secondary classification screening: such as brand + product model query price. For example, provinces and cities or cities and counties or counties and townships can jointly query after-sales outlets, and counties and townships can jointly query nucleic acid testing sites at the second level.

Use environment pagoda or guardian god or virtual space PHP5.5+,

Development environment Pagoda PHP5.6; phpstudy environment is not recommended (default time zone, fault tolerance and many other configurations are not mainstream).

Universal for LINUX/WINDOWS, the query result form can be displayed vertically on the mobile phone and horizontally on the computer.

General two-dimensional table filtering, no limit on the number of rows (recommended within 50,000 rows) and column number (recommended 2-50 columns)

The content of each cell is determined by data, so this is a general query.

The caching design eliminates the need to read linkage information for each query, greatly reducing the load on the server.

Low-volume design, code contains dozens of KB of data; easy for secondary development and security assessment.

Without using network plug-ins such as jq, the compact webpage can save you bandwidth costs or increase network concurrency.