Principles of importing and exporting excel in php, and importing and exporting excel in php

Principles of importing and exporting excel in php, and importing and exporting excel in php

In php, we often need to import and export excel files to facilitate background management. So what is the principle of php excel import and export? Excelis divided into two major types: excel2007(suffix .xlsx)、excel2003(suffix .xls). excel2007 is essentially a collection of xml documents (compressed documents). The composition of excel2007 documents is a collection of xml compressed documents. The process in which php generates an excel file is the process in which php generates and integrates xml files. Excel2003: essentially a binary file. (Open a binary file and write binary information to it ).