Discuss the reasons and solutions for garbled characters in Excel tables read by PHP

With the rapid development of informatization, Excel tables have become an indispensable tool in our daily work. For developers, using PHP language to read Excel tables is also one of the frequently required tasks. However, when reading Excel tables, garbled characters may appear, causing inconvenience to the running of the program and the processing of data. This article will discuss the reasons and solutions for garbled characters in Excel tables read by PHP.

1. What is Excel garbled code?

Although the Excel file is stored in binary, its file header also contains XML version information, which tells us which encoding method is used. The reason why Excel is garbled is because PHP does not correctly recognize the encoding format in the file when reading the Excel file, resulting in garbled characters.

2. Reasons for Excel garbled characters

1. Inconsistent encoding methods

When we copy text with different encoding methods into an Excel table, if Excel’s current encoding format Different from the copied text, garbled characters will appear.

2. The data storage format is incorrect

There are different data storage formats in Excel, such as text, numbers, dates, etc. If the data storage format in Excel is incorrect, it will result in garbled characters.

3. There is a problem with the file itself

Sometimes there is a problem with the Excel file itself, which can also cause garbled characters. For example, in a compressed Excel file, if we do not use the correct decompression tool to decompress the file, the file may be damaged.

3. Solution to Excel garbled code

1. Modify the encoding method of Excel

In Excel, we can manually set the encoding method of the file to ensure that it is consistent with PHP encoding Consistency of approach. The specific steps are as follows:

a. Open the Excel file, click the "File" tab, and select "Options".

b. Select the "Advanced" option in the pop-up window.

c. Find the "Regional Options" column and change the text format from the original default format to a format consistent with PHP (such as UTF-8).

2. Modify the encoding method in the code

We can set the encoding method of the file when reading the Excel file to ensure that PHP can correctly identify the text content in Excel. The specific code is as follows:

$reader = PHPExcel_IOFactory::createReader('Excel2007' );
$reader->setReadDataOnly(true);
$reader->setEncoding('UTF-8 ');
$PHPExcel = $reader->load($filename);

3. Check the data storage format in Excel

We can set the data storage format in Excel , to ensure that the information can be read correctly by PHP. For example, when we read an Excel table containing dates, we can use the following code:

$objPHPExcel->getActiveSheet() ->getStyle('A1') ->getNumberFormat() ->setFormatCode (PHPExcel_Style_NumberFormat::FORMAT_DATE_YYYYMMDD2);

4. Check whether the file is damaged

We can solve the Excel garbled problem by checking the integrity of the Excel file. You can choose to use a packaging tool to package the Excel file into a zip file, and then use the decompression tool to decompress the file and check whether the file is decompressed correctly.

Summary:

The Excel garbled problem is one of the common problems when PHP reads Excel. The main solutions are: modify the encoding method of Excel, modify the encoding method in the code, and check Excel data storage format and check whether the file is damaged. Different situations may require different operating methods, but solving this problem can improve the efficiency of reading Excel and bring convenience to the development process.

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