这里使用PHPExcel的开源类

一个完整的实例：

<?php
require_once("../includes/function.php"); //提供了SQL注入检测函数inject_check
require_once("../class/DB.php"); //DB操作类，自己扩展一下
$db = new DB();

if($_GET['show_year']){
$_GET['show_year'] = inject_check($_GET['show_year']);
} else {
echo "<script>location.href='{$_SERVER['REQUEST_URI']}';</script>";
return;
}

//查出开设预约的班级的学生名单
$sql = "select * from bishe_student,student where bishe_student.sno=student.sno ";

if($_GET['show_year'] && $_GET['show_year']!='-1'){
$lagreYear = $_GET['show_year']+1;
$sql .= " and bishe_student.time>='{$_GET['show_year']}

-01-01 00:00:00' and bishe_student.time<'{$lagreYear}-01-01 00:00:00'";
}

$sql .= "order by bishe_student.time asc; ";

$rs = $db->query($sql);

/**
*该PHP代码块开始为能够输出EXCEL文件作准备
*/

第一步，开头操作，包括引入类、设定文件基本属性
require_once("../Excel/Classes/PHPExcel.php");
require_once("../Excel/Classes/PHPExcel/Writer/Excel5.php");

//单元格的字母坐标
$colx = array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s'

,'t','u','v','w','x','y','z','aa','ab','ac','ad','ae','af','ag','ah','ai','ak','al',

'am','an','ao','ap','aq','ar','as','at','au','av','aw','ax','ay','az');
// 创建一个处理对象实例
$objExcel = new PHPExcel();

// 创建文件格式写入对象实例, uncomment
$objWriter = new PHPExcel_Writer_Excel5($objExcel);

//设置文档基本属性
$objProps = $objExcel->getProperties();
$objProps->setCreator( gbkToUtf8("计算机学院专业实践中心") );
$objProps->setLastModifiedBy( gbkToUtf8("计算机学院专业实践中心") );
$objProps->setTitle( gbkToUtf8("毕业设计预约学生表") );
$objProps->setSubject( gbkToUtf8("毕业设计预约学生表") );
$objProps->setDescription( gbkToUtf8("毕业设计预约学生表") );
$objProps->setKeywords( gbkToUtf8("毕业设计预约学生表") );
$objProps->setCategory( gbkToUtf8("毕业设计预约学生表") );

//*******
//设置当前的sheet索引，用于后续的内容操作。
//一般只有在使用多个sheet的时候才需要显示调用。
//缺省情况下，PHPExcel会自动创建第一个sheet被设置SheetIndex=0
$objExcel->setActiveSheetIndex(0);
$objActSheet = $objExcel->getActiveSheet();

//设置当前活动sheet的名称
$objActSheet->setTitle('sheet1');


//设置宽度
function setWidth($index,$width=5){
global $objActSheet;
$objActSheet->getColumnDimension(gbkToUtf8($index))->setWidth($width);
}

//宽度设置
for($i=0;$i<51;$i++){
//echo $colx[$i]."";
$ind = $colx[$i];

setWidth(gbkToUtf8("$ind"),11);
}

$objActSheet->getRowDimension(1)->setRowHeight(30);
$objActSheet->getRowDimension(2)->setRowHeight(20);
$objActSheet->getRowDimension(3)->setRowHeight(16);


//函数：设置border
function setBorder($index){
global $objActSheet;
$objActSheet->getStyle($index)->getBorders()->getTop()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN );
$objActSheet->getStyle($index)->getBorders()->getLeft()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN );
$objActSheet->getStyle($index)->getBorders()->getRight()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN );
$objActSheet->getStyle($index)->getBorders()->getBottom()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN );
$objActSheet->getStyle($index)->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
$objActSheet->getStyle($index)->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER);
$objActSheet->getStyle($index)->getAlignment()->setWrapText(true);


}

//设置值
function setValue($index,$value){
global $objActSheet;
$objActSheet->setCellValue($index,gbkToUtf8($value) );
}

//设置值
function setValueGBK($index,$value){
global $objActSheet;
$objActSheet->getCell($index)->setValueExplicit($value, PHPExcel_Cell_DataType::TYPE_STRING);
}

//合并单元格
function merge($fc,$lc){
global $objActSheet;
$objActSheet->mergeCells($fc.":".$lc);
}

//********************开始写入数据

$lastIndex = 10;

$objActSheet->setCellValue('A1',gbkToUtf8( '毕业设计上机预约学生表' ) );
//合并单元格

$objActSheet->mergeCells("A1:".$colx[$lastIndex]."1");
//设置样式
$objStyleA1 = $objActSheet->getStyle('A1');
$objStyleA1->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
$objFontA1 = $objStyleA1->getFont();
$objFontA1->setName('Courier New');
$objFontA1->setSize(18);
$objFontA1->setBold(true);



$rowIndexB = 3;
function showBottomRows($xuhao='序号',$xuehao='学号',

$xingming='姓名',$bishelaoshi='毕设老师',$bishetimu='毕设题目',

$phone='电话',$email='Email',$beizhu='备注'){
global $colx;
global $rowIndexB;
$colIndexB = 0;

//都分三步，设值、合并、边框
//序号
setValue($colx[$colIndexB].$rowIndexB , $xuhao);
merge($colx[$colIndexB].$rowIndexB , $colx[$colIndexB].$rowIndexB );
$colIndexB = $colIndexB+1;
//学号
setValue($colx[$colIndexB].$rowIndexB , $xuehao);
merge($colx[$colIndexB].$rowIndexB , $colx[$colIndexB].$rowIndexB );
$colIndexB = $colIndexB+1;

//姓名
setValue($colx[$colIndexB].$rowIndexB , $xingming);
merge($colx[$colIndexB].$rowIndexB , $colx[$colIndexB].$rowIndexB );
$colIndexB = $colIndexB+1;

//毕设老师
setValue($colx[$colIndexB].$rowIndexB , $bishelaoshi);
merge($colx[$colIndexB].$rowIndexB , $colx[$colIndexB].$rowIndexB );
$colIndexB = $colIndexB+1;

//毕设题目
setValue($colx[$colIndexB].$rowIndexB , $bishetimu);
merge($colx[$colIndexB].$rowIndexB , $colx[$colIndexB+2].$rowIndexB );
$colIndexB = $colIndexB+3;

//电话
setValue($colx[$colIndexB].$rowIndexB , $phone);
merge($colx[$colIndexB].$rowIndexB , $colx[$colIndexB].$rowIndexB );
$colIndexB = $colIndexB+1;

//Email
setValue($colx[$colIndexB].$rowIndexB , $email);
merge($colx[$colIndexB].$rowIndexB , $colx[$colIndexB+1].$rowIndexB );
$colIndexB = $colIndexB+2;

//备注
setValue($colx[$colIndexB].$rowIndexB , $beizhu);
merge($colx[$colIndexB].$rowIndexB , $colx[$colIndexB].$rowIndexB );
$colIndexB = $colIndexB+1;


for($xx=0;$xx<$lastIndex;$xx++){
setBorder($colx[$xx].$rowIndexB);
}
$rowIndexB++;
}
showBottomRows();
//***表格头部结束
第一步结束，第二步就可以开始打印数据，在下面的主要函数里面


$order=1;
while($row = $db->getRows($rs)){
showBottomRows(
$order++ ,
" ".$row['sno'],
" ".$row['sname'] ,
" ".$row['bishe_teacher'],
" ".$row['bishe_title'],
" ".$row['bishe_phone'],
" ".$row['bishe_email'],
" "
);
}

//刷新border
for($i=0;$i<=$lastIndex;$i++){
$objStyleA3 = $objActSheet->getStyle('A3');
$objStyleA3->getBorders()->getTop()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN );
$objStyleA3->getBorders()->getLeft()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN );
$objStyleA3->getBorders()->getRight()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN );
$objStyleA3->getBorders()->getBottom()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN );
$objStyleA3->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
$objStyleA3->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER);

//$objActSheet->duplicateStyle($objStyleA3, 'A3:'.$colx[$lastIndex].(mysql_num_rows( $result_stuList )+3) );
$objActSheet->duplicateStyle($objStyleA3, 'A3:'.$colx[$lastIndex].($db->getRowsNum($rs)+3) );
}

$cancel_time=date("YmdHis");
$outputFileName = "{$cancel_time}bisheYuyueStudentList.xls";
//到文件
$objWriter->save('../temp/'.$outputFileName);


header("Content-Type: application/OCTET-STREAM");
header("Content-Disposition: inline; filename={$_GET['show_year']}年毕业设计上机预约学生表.xls");
readfile('../temp/'.$outputFileName);

echo "<script language='javascript'>
location.href='{$_SERVER['REQUEST_URI']}';
</script>
";
?>