What should I do if the php excel export cannot be imported directly?

In recent years, with the rapid development of information technology and the popularization of the Internet, spreadsheets have gradually become one of the indispensable tools in people's work, study, and life. Whether it is data processing and analysis in the business field or presentation of experimental results in the academic field, spreadsheets play a very important role. In the process of data processing, Excel has undoubtedly been widely used.

When using Excel, we often need to import and export data to facilitate data processing and communication. Among them, php excel export has become the method favored by many developers. PHP excel export can export data from the database to an Excel file and allows developers to customize the style and format of the table. However, despite the powerful export function of php excel, there is a more troublesome problem in actual use: it cannot be imported directly.

1. Advantages and disadvantages of php excel export function

php excel is an open source php class library. Through php excel, you can export data into Excel files and customize the style of Excel files. and format. php excel can be used within php websites, there are no additional components or applications that need to be installed. It is simple and convenient to use, and the generated Excel file has a beautiful and easy-to-read style. It is widely used in data export, report development, data processing, etc.

Compared with other tools for exporting Excel, php excel has the following significant advantages:

1. The format of the generated Excel file is perfect

The generated Excel file can be perfectly supported All Excel versions, no special settings required.

2. Flexible styles and formats

php excel provides a large number of style and format options. You can customize styles, fonts, colors, borders, background colors, etc. to make the exported data more Beautiful.

3. Support large batch data export

php excel can easily handle the export of large batches of data, which is very suitable for business scenarios that need to generate large amounts of data.

php excel has so many advantages, why is there a problem that it cannot be imported directly? Let’s take a look at why.

2. Reasons why php excel export cannot be imported directly

1. File format problem

The default format of the Excel file generated by php excel is xlsx file format. xlsx is the default saving format of Microsoft Office 2007. It is an XML-based file format that can bring higher data storage efficiency and better data security. But when exporting to Excel, the xlsx format is not a good choice. Because most people are still using lower versions of Excel (such as 2003, 2007), although compatibility can be processed, under special circumstances, it is still easy to have problems such as incomplete read data and confusing styles.

2. Garbled code problem

When exporting Excel, if you encounter special characters, the Excel file exported by php excel is prone to garbled code problems. This is because the default encoding format of Excel files is Unicode. Encoding, and the encoding format used in PHP may not match the encoding format of the Excel file, resulting in data errors.

3. Import setting issues

Since Excel files have strict format requirements for importing data, if the data is not imported according to a specific format, the data read by Excel may be garbled or incomplete. Case.

The above three points are the main reasons why php excel export cannot be imported directly.

3. Solve the problem that php excel export cannot be imported directly

1. Modify the format of the export file

In order to solve the file format problem, you can modify the format of the generated Excel file It is in xls format, which is the most basic binary format of Excel and is compatible with most Excel versions. In php excel, you only need to add a line of code to modify the generated Excel file format to xls format:

$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');//生成excel文件，后缀为xls格式

2. Unified encoding format

When generating Excel, the data is uniformly converted It is in UTF-8 format. Adding UTF-8 fonts to the exported Excel file can avoid garbled characters. We can use the following code to set the encoding format in php:

header("Content-Type: text/html; charset=utf-8");

3. Set according to a specific format when importing

When importing Excel data, it needs to be set according to a specific format. Generally speaking, when exporting data, it is best to export it in accordance with the standard format of Excel so that it can be more standardized when importing.

4. Optimization of php excel export application

In addition to the above solutions, we can also start from other aspects to optimize the php excel export application to improve its efficiency and usability.

1. Caching mechanism

Generally speaking, exporting Excel files takes a long time, so in order to improve performance and user experience, we can use the caching mechanism. Each time you export, the generated Excel file is cached, and the next time you export the same data, you can get it from the cache.

2. Multi-threaded export

As the amount of data increases, the time to export Excel data becomes longer and longer. In order to improve efficiency, you can use multi-threaded export to split the task of generating Excel files into multiple threads for parallel execution to speed up the export.

3. Template export

When we need to generate a large amount of similar data, we can encapsulate the style and format in the Excel file into a template, and dynamically adjust the data in the template to generate Excel document. This method can avoid style and format confusion, reduce programming difficulty, and improve efficiency.

In summary, although php excel has strong advantages in data processing, there is also the problem that export cannot be directly imported. We need to solve this problem from all aspects to improve the application efficiency and usability of php excel.

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