search
HomeBackend DevelopmentPHP Tutorialphp导出CSV抽象类实例_php技巧

本文实例讲述了php导出CSV抽象类及其应用,分享给大家供大家参考。具体分析如下:

该php导出CSV抽象类,可根据总记录数与每批次记录数,计算总批次,循环导出。避免内存不足的问题。

ExportCSV.class.php类文件如下:

<&#63;php 
/** php Export CSV abstract class,根据总记录数与每批次记录数,计算总批次,循环导出。 
*  Date:  2014-05-16 
*  Author: fdipzone 
*  Ver:  1.0 
* 
*  Func: 
*  public setPageSize   设置每批次导出的记录条数 
*  public setExportName  设置导出的文件名 
*  public setSeparator   设置分隔符 
*  public setDelimiter   设置定界符 
*  public export      执行导出 
*  private getPageCount   计算导出总批次 
*  private setHeader    设置导出文件header 
*  private formatCSV    将数据格式化为csv格式 
*  private escape      转义字符串 
*  abstract getExportTotal 获取总记录条数,抽象方法,需继承类实现 
*  abstract getExportFields 获取导出的列名,抽象方法,需继承类实现 
*  abstract getExportData  获取每页记录,抽象方法,需继承类实现 
*/ 
 
abstract class ExportCSV{ // class start 
 
  // 定义子类必须要实现的方法 
   
  /** 获取总记录条数 
  * @return int 
  */ 
  abstract protected function getExportTotal(); 
 
  /** 获取导出的列名 
  * @return Array 
  */ 
  abstract protected function getExportFields(); 
 
  /** 获取每批次数据 
  * @param int $offset 偏移量 
  * @param int $limit 获取的记录条数 
  * @return Array 
  */ 
  abstract protected function getExportData($offset, $limit); 
 
  // 定义类属性 
  protected $total = 0;         // 总记录数 
  protected $pagesize = 500;      // 每批次导出的记录数 
  protected $exportName = 'export.csv'; // 导出的文件名 
  protected $separator = ',';      // 设置分隔符 
  protected $delimiter = '"';      // 设置定界符 
 
 
  /** 设置每次导出的记录条数 
  * @param int $pagesize 每次导出的记录条数 
  */ 
  public function setPageSize($pagesize=0){ 
    if(is_numeric($pagesize) && $pagesize>0){ 
      $this->pagesize = $pagesize; 
    } 
  } 
 
  /** 设置导出的文件名 
  * @param String $filename 导出的文件名 
  */ 
  public function setExportName($filename){ 
    if($filename!=''){ 
      $this->exportName = $filename; 
    } 
  } 
 
  /** 设置分隔符 
  * @param String $separator 分隔符 
  */ 
  public function setSeparator($separator){ 
    if($separator!=''){ 
      $this->separator = $separator; 
    } 
  } 
 
  /** 设置定界符 
  * @param String $delimiter 定界符 
  */ 
  public function setDelimiter($delimiter){ 
    if($delimiter!=''){ 
      $this->delimiter = $delimiter; 
    } 
  } 
 
  /** 导出csv */ 
  public function export(){ 
 
    // 获取总记录数 
    $this->total = $this->getExportTotal(); 
 
    // 没有记录 
    if(!$this->total){ 
      return false; 
    } 
 
    // 计算导出总批次 
    $pagecount = $this->getPageCount(); 
 
    // 获取导出的列名 
    $fields = $this->getExportFields(); 
 
    // 设置导出文件header 
    $this->setHeader(); 
 
    // 循环导出 
    for($i=0; $i<$pagecount; $i++){ 
 
      $exportData = ''; 
 
      if($i==0){ // 第一条记录前先导出列名 
        $exportData .= $this->formatCSV($fields); 
      } 
 
      // 设置偏移值 
      $offset = $i*$this->pagesize; 
 
      // 获取每页数据 
      $data = $this->getExportData($offset, $this->pagesize); 
 
      // 将每页数据转换为csv格式 
      if($data){ 
        foreach($data as $row){ 
          $exportData .= $this->formatCSV($row); 
        } 
      } 
 
      // 导出数据 
      echo $exportData; 
    } 
  } 
 
  /** 计算总批次 */ 
  private function getPageCount(){ 
    $pagecount = (int)(($this->total-1)/$this->pagesize)+1; 
    return $pagecount; 
  } 
 
  /** 设置导出文件header */ 
  private function setHeader(){ 
    header('content-type:application/x-msexcel'); 
 
    $ua = $_SERVER['HTTP_USER_AGENT']; 
 
    if(preg_match("/MSIE/", $ua)){ 
      header('content-disposition:attachment; filename="'.rawurlencode($this->exportName).'"'); 
    }elseif(preg_match("/Firefox/", $ua)){ 
      header("content-disposition:attachment; filename*=\"utf8''".$this->exportName.'"'); 
    }else{ 
      header('content-disposition:attachment; filename="'.$this->exportName.'"'); 
    } 
 
    ob_end_flush(); 
    ob_implicit_flush(true); 
  } 
 
  /** 格式化为csv格式数据 
  * @param Array $data 要转换为csv格式的数组 
  */ 
  private function formatCSV($data=array()){ 
    // 对数组每个元素进行转义 
    $data = array_map(array($this,'escape'), $data); 
    return $this->delimiter.implode($this->delimiter.$this->separator.$this->delimiter, $data).$this->delimiter."\r\n"; 
  } 
 
  /** 转义字符串 
  * @param String $str 
  * @return String 
  */ 
  private function escape($str){ 
    return str_replace($this->delimiter, $this->delimiter.$this->delimiter, $str); 
  } 
} // class end 
 
&#63;> 

demo示例程序如下:

<&#63;php 
 
// ExportCSV abstract class 
require "ExportCSV.class.php"; 
 
// 定义继承类 
class myexport extends ExportCSV{ 
 
  // 要导出的数据,实际情况会从db读取 
  protected $data = array( 
    array('1','傲雪星枫"','男'), 
    array('2','傲雪星枫","','男'), 
    array('3','傲雪星枫","','男'), 
    array('4',"傲雪星枫\"\"\r\n换行",'男'), 
    array('5','傲雪星枫,,','男'), 
    array('6','傲雪星枫"','男'), 
    array('7','傲雪星枫','男'), 
    array('8','傲雪星枫','男'), 
    array('9','傲雪星枫','男'), 
    array('10','傲雪星枫','男') 
  ); 
 
  /* 返回总导出记录数 
  * @return int 
  */ 
  protected function getExportTotal(){ 
    return count($this->data); 
  } 
 
  /** 返回导出的列名 
  * @return Array 
  */ 
  protected function getExportFields(){ 
    $title = array('id','name','gender'); 
    return $title; 
  } 
 
  /* 返回每批次的记录 
  * @param int $offset 偏移量 
  * @param int $limit 获取的记录条数 
  * @return Array 
  */ 
  protected function getExportData($offset, $limit){ 
    return array_slice($this->data, $offset, $limit); 
  } 
} 
 
// 导出 
$obj = new myexport(); 
$obj->setPageSize(1); 
$obj->setExportName('myexport.csv'); 
$obj->setSeparator(','); 
$obj->setDelimiter('"'); 
$obj->export(); 
&#63;> 

完整实例代码点击此处本站下载

希望本文所述对大家的PHP程序设计有所帮助。

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
PHP and Python: Different Paradigms ExplainedPHP and Python: Different Paradigms ExplainedApr 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: A Deep Dive into Their HistoryPHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

Choosing Between PHP and Python: A GuideChoosing Between PHP and Python: A GuideApr 18, 2025 am 12:24 AM

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP and Frameworks: Modernizing the LanguagePHP and Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AM

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHP's Impact: Web Development and BeyondPHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

How does PHP type hinting work, including scalar types, return types, union types, and nullable types?How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values ​​and handle functions that may return null values.

How does PHP handle object cloning (clone keyword) and the __clone magic method?How does PHP handle object cloning (clone keyword) and the __clone magic method?Apr 17, 2025 am 12:24 AM

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP vs. Python: Use Cases and ApplicationsPHP vs. Python: Use Cases and ApplicationsApr 17, 2025 am 12:23 AM

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
Will R.E.P.O. Have Crossplay?
1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool