php generate csv file
The content of this article is about php generating csv files. It has certain reference value. Now I share it with everyone. Friends in need can refer to it
No more nonsense, here is the practical information
Method one:
/** * 导出excel(csv)
* @data 导出数据
* @headlist 第一行,列名
* @fileName 输出Excel文件名
*/
function csv_export($data = array(), $headlist = array(), $fileName)
{
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="'.$fileName.'.csv"');
header('Cache-Control: max-age=0');
//打开PHP文件句柄,php://output 表示直接输出到浏览器
$fp = fopen('php://output', 'a');// 打开文件资源，不存在则创建
//输出Excel列名信息
foreach ($headlist as $key => $value) {
//CSV的Excel支持GBK编码，一定要转换，否则乱码
$headlist[$key] = iconv('utf-8', 'gbk', $value);
}
//将数据通过fputcsv写到文件句柄
fputcsv($fp, $headlist);
//计数器
$num = 0;
//每隔$limit行，刷新一下输出buffer，不要太大，也不要太小
$limit = 100000;
//逐行取出数据，不浪费内存
$count = count($data);
for ($i = 0; $i < $count; $i++) {
$num++;
//刷新一下输出buffer，防止由于数据过多造成问题
if ($limit == $num) {
ob_flush();
flush();
$num = 0;
}
$row = $data[$i];
foreach ($row as $key => $value) {
$row[$key] = iconv('utf-8', 'gbk', $value);
}
fputcsv($fp, $row);
}
}Method two:
public function getExportLog(){
if (! $this->valid_admin ( @$_SERVER ['PHP_AUTH_USER'], @$_SERVER ['PHP_AUTH_PW'] )) {
//$_SERVER ['PHP_AUTH_USER']浏览器接受的用户名输入
header ( 'WWW-Authenticate: Basic realm=""' );//浏览器弹出输入用户名密码提示框
header ( 'HTTP/1.0 401 Unauthorized' );
echo "You need to enter a valid username and password.";
exit ();
}
$oViewLog = new DbsPatientViewLog();
$result = $oViewLog->getAllInfo();
$sname = time();
$dataname=date('Ymd');
$exportdir = public_path()."/exportfile/".$dataname."/";
if(!is_dir($exportdir))
{ mkdir($exportdir,0777,true);
} //生成csv文件 $elsfile=$exportdir.$sname.'.csv';
$fp = fopen($elsfile, 'w');
$data="";
$title=implode(',', array('医脉通加密ID','医脉通ID','文章ID','参与的活动','访问活动首页的时间','访问记录信息页面的时间','参与活动的方式'));
$data=$title;
foreach($result as $value)
{
$line=implode(',', array($value['meduid_old'],
$value['meduid'],
$value['msgid'],
$value['hd_way']==1?'疑似患者转诊':'DES试纸',
$value['view_at'],
$value['view_at_show'],
$value['view_way']==1?'mobile':$value['view_way']==2?'微信浏览器': 'PC',
)
);
$data=$data."\r\n".$line;
}
$data=iconv("UTF-8", "GBK//IGNORE", $data); fwrite($fp,$data); // 写入数据
fclose($fp); //关闭文件句柄
$download_dir= "/exportfile/".$dataname.'/'.$sname.'.csv';
header("Content-type:text/csv");
header("Content-Disposition:attachment;filename=".$sname.'.csv');
header('Cache-Control:must-revalidate,post-check=0,pre-check=0');
header('Expires:0');
header('Pragma:public');
echo $data;}Although the above are two methods, they can actually be regarded as a
process:
1 . Use the fopen() function to open the specified file. There is no created file.
2. Process the title. If it is an array, you can use fputcsv() directly like the first code to write the data directly to the file. handle; or use the second piece of code to split using the implode() function
3. For data processing, the first piece is to convert the data line by line into the data format and write it to the file; the second piece is to implode () Split the data, the whole data is finally spliced together, and the format is converted to write the data; Note: fwrite() writes the data
4. Close File handle
Summary: The process of generating a csv file is like this. I recommend the first one, which saves memory and refreshes the output buffer regularly to prevent problems caused by too much data
Related recommendations:
PHP generates a specified number of verification codes and controllable interference elements
PHP generates specified digit verification code and controllable interference elements Part 2
The above is the detailed content of php generate csv file. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1668
14
1426
52
1329
25
1273
29
1256
24
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
PHP vs. Python: Understanding the Differences
Apr 11, 2025 am 12:15 AM
PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.
PHP in Action: Real-World Examples and Applications
Apr 14, 2025 am 12:19 AM
PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
The Enduring Relevance of PHP: Is It Still Alive?
Apr 14, 2025 am 12:12 AM
PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.
PHP vs. Other Languages: A Comparison
Apr 13, 2025 am 12:19 AM
PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.
PHP and Python: Different Paradigms Explained
Apr 18, 2025 am 12:26 AM
PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.
PHP and Python: Code Examples and Comparison
Apr 15, 2025 am 12:07 AM
PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.
