PHP exports MySQL data to an Excel file (fputcsv)

Source: Internet
Author: User
I often encounter the need to export data from a database to an Excel file. using some open-source class libraries, such as PHPExcel, is indeed easy to implement, but it does not support a lot of data, it is easy to reach the PHP memory usage limit. The method here is to use fputcsv to write a CSV file and directly output an Excel file to the browser.

The code is as follows:


// Output the excelfile header, which can replace user.csv with the file name you want
Header ('content-Type: application/vnd. ms-excel ');
Header ('content-Disposition: attachment; filename = "user.csv "');
Header ('cache-Control: max-age = 0 ');

// Obtain data from the database. to save memory usage, do not read data to the memory in one row from the handle.
$ SQL = 'select * from tbl where ...... ';
$ Stmt = $ db-> query ($ SQL );

// Open the php file handle. php: // output indicates that the file is directly output to the browser.
$ Fp = fopen ('php: // output', 'A ');

// Output the Excel column name information
$ Head = array ('name', 'gender ', 'age', 'Email', 'telephony ','...... ');
Foreach ($ head as $ I =>$ v ){
// CSV Excel supports GBK encoding and must be converted; otherwise, garbled characters
$ Head [$ I] = iconv ('utf-8', 'gbk', $ v );
}

// Write data to the file handle through fputcsv
Fputcsv ($ fp, $ head );

// Counter
$ Cnt = 0;
// Refresh the output buffer every $ limit Line. do not set the buffer size to too large or too small.
$ Limit = 100000;

// Extract data row by row without wasting memory
While ($ row = $ stmt-> fetch (Zend_Db: FETCH_NUM )){

$ Cnt ++;
If ($ limit = $ cnt) {// refresh the output buffer to prevent problems caused by excessive data
Ob_flush ();
Flush ();
$ Cnt = 0;
}

Foreach ($ row as $ I =>$ v ){
$ Row [$ I] = iconv ('utf-8', 'gbk', $ v );
}
Fputcsv ($ fp, $ row );
}


The advantage is simple and easy to use, which saves a lot of memory and does not rely on third-party class libraries.

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.