php导出CSV抽象类实例_PHP
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:
<?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 ?>
demo示例程序如下:
<?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(); ?>
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。

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



PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
