PHP exports CSV abstract class instances, exports csv abstract instances

PHP exports CSV abstract class instances, exports csv abstract instances_PHP tutorial

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Release： 2016-07-13 10:18:19

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php exports CSV abstract class instances, exports csv abstract instances

The example in this article describes the CSV abstract class exported by PHP and its application, and is shared with everyone for your reference. The specific analysis is as follows:

This php exports CSV abstract class, which can calculate the total batch according to the total number of records and the number of records in each batch, and export it in a loop. Avoid out of memory issues.

The ExportCSV.class.php class file is as follows:

<&#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;>

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The demo sample program is as follows:

<&#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;>

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Click here to download the complete example code from this website.

I hope this article will be helpful to everyone’s PHP programming design.

Source code PHP export data to csv file

$DB_Server = "localhost";
$DB_Username = "root";
$DB_Password = "";
$DB_DBName = "DBName";
$ DB_TBLName = "DB_TBLName";

$savename = date("YmjHis");
$Connect = @mysql_connect($DB_Server, $DB_Username, $DB_Password) or die("Couldn't connect." );
mysql_query("Set Names 'gbk'");
$file_type = "vnd.ms-excel";
$file_ending = "xls";
header("Content-Type: application/$file_type;charset=gbk");
header("Content-Disposition: attachment; filename=".$savename.".$file_ending");
//header("Pragma: no-cache ");

$now_date = date("Y-m-j H:i:s");
//$title = "Database name: $DB_DBName, data table: $DB_TBLName, backup date: $now_date ";

$sql = "Select * from $DB_TBLName";
$ALT_Db = @mysql_select_db($DB_DBName, $Connect) or die("Couldn't select database");
$ result = @mysql_query($sql,$Connect) or die(mysql_error());

//echo("$title\n");
$sep = "\t";
for ($i = 0; $i < mysql_num_fields($result); $i++) {
echo mysql_field_name($result,$i) . "\t";
}
print(" \n");
$i = 0;
while($row = mysql_fetch_row($result)) {
$schema_insert = "";
for($j=0; $j< mysql_num_fields($result);$j++) {
if(!isset($row[$j]))
$schema_insert .= "NULL".$sep;
elseif ($row[$j ] != "")
$schema_insert .= "$row[$j]".$sep;
else
$schema_insert...The rest of the text>>

php generates csv file and prompts to save

If you do this, you will have to allow users to upload previous csv files at the same time

Or you can save the latest csv files of different users on the server