php原生导出excel文件的两种方法(推荐)

第一种方法：

$filename='文件名称';
  $filetitle='你的标题';
  if($_POST){
    set_time_limit(10000)；
    $title = '';
    ini_set('memory_limit','300M');
    header('Content-Type: application/vnd.ms-excel;charset=utf-8');
    $name = $title.".xls";
    header('Content-Disposition: attachment;filename='.$name.'');
    header('Cache-Control: max-age=0');
    $where = "1=1";
    $sql = "";
    $query = DB::Query($sql);
    // PHP文件句柄，php://output 表示直接输出到浏览器 
    $fp = fopen('php://output', 'a');
    // 输出Excel列头信息 
    $head = array('ID');
    //字符替换
    $p_new_lines = array("rn", "n","t","r","rn", "
","
","
","
","
");
    $p_change_line_in_excel_cell = '';

    foreach($head as $v){
      echo iconv('utf-8','gb2312',$v) . "t";
    }
    echo "n";
    // 计数器 
    $cnt = 0;
    // 每隔$limit行，刷新一下输出buffer，节约资源 
    $limit = 100000;
    // 逐行取出数据，节约内存
    while ($res = mysql_fetch_assoc($query)) {
      $cnt ++;
      if ($limit == $cnt) { //刷新一下输出buffer，防止由于数据过多造成问题 
 ob_flush();
 flush();
 $cnt = 0;
      } 
      echo trim($res['id']). "t";
      echo "n";
    }

  }

第二种方法：

$filename='文件名称';
  $filetitle='你的标题';
  if($_POST){
    $title = '';
    ini_set('memory_limit','300M');
    header('Content-Type: application/vnd.ms-excel;charset=utf-8');
    $name = $title.".xls";
    header('Content-Disposition: attachment;filename='.$name.'');
    header('Cache-Control: max-age=0');
    echo '
    
      
      
      
    ';
    $where = "1=1";

    $sql = " ";
    mysql_query('set names "utf8"');
    mysql_set_charset('utf8');
    $query = DB::Query($sql);

    // PHP文件句柄，php://output 表示直接输出到浏览器 
    $fp = fopen('php://output', 'a');
    // 输出Excel列头信息 
    $head = array('ID','xxx');
    //字符替换
    $p_new_lines = array("rn", "n","t","r","rn", "
","
","
","
","
");
    $p_change_line_in_excel_cell = '';
    echo "";
    echo "";
    foreach($head as $v){
      echo "";
    }
    echo "";
    // 逐行取出数据，节约内存
    while ($res = mysql_fetch_assoc($query)) {
      echo "";
      echo "";
      echo "";
      echo"";
    }
    echo "
".iconv('utf-8','gb2312',$v)."
".$res['id']."
".iconv('utf-8', 'gb2312', $res['xxx']."
";
  }

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