PHPExcel 下载地址：

https://github.com/PHPOffice/PHPExcel

git clone https://github.com/PHPOffice/PHPExcel.git

使用方法

<?php
class ExcelToArrary {
	public function __construct() {
		/*导入phpExcel核心类    注意 ：你的路径跟我不一样就不能直接复制*/
		include_once './Classes/PHPExcel.php';
	}

	/* 导出excel函数*/
	public function push($data, $name = 'Excel') {
		error_reporting(E_ALL);
		date_default_timezone_set('Europe/London');
		$objPHPExcel = new PHPExcel();
		/*以下是一些设置 ，什么作者  标题啊之类的*/
		$objPHPExcel->getProperties()->setCreator(iconv("UTF-8", "GBK", "转弯的阳光"))
			->setLastModifiedBy("转弯的阳光")
			->setTitle("数据EXCEL导出")
			->setSubject("数据EXCEL导出")
			->setDescription("备份数据")
			->setKeywords("excel")
			->setCategory("result file");
		/*以下就是对处理Excel里的数据， 横着取数据，主要是这一步，其他基本都不要改*/
		foreach ($data as $k => $v) {
			$num = $k + 1;
			$objPHPExcel->setActiveSheetIndex(0)
			//Excel的第A列，uid是你查出数组的键值，下面以此类推
				->setCellValue('A' . $num, $v['uid'])
				->setCellValue('B' . $num, $v['email'])
				->setCellValue('C' . $num, $v['password']);
		}
		$objPHPExcel->getActiveSheet()->setTitle('User');
		$objPHPExcel->getActiveSheet()->getColumnDimension('B')->setAutoSize(true);
		$objPHPExcel->getActiveSheet()->getStyle('B1')->getFont()->setName('Candara');
		$objPHPExcel->getActiveSheet()->getStyle('B1')->getFont()->setSize(20);
		$objPHPExcel->getActiveSheet()->getStyle('B1')->getFont()->setBold(true);
		$objPHPExcel->getActiveSheet()->getStyle('B1')->getFont()->setUnderline(PHPExcel_Style_Font::UNDERLINE_SINGLE);
		$objPHPExcel->getActiveSheet()->getStyle('B1')->getFont()->getColor()->setARGB(PHPExcel_Style_Color::COLOR_WHITE);
		$objPHPExcel->getActiveSheet()->getStyle('C1')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_RIGHT);
		$objPHPExcel->getActiveSheet()->getStyle('A1')->getBorders()->getLeft()->getColor()->setARGB('FF993300');
		$objPHPExcel->getActiveSheet()->getStyle('A1')->getFill()->setFillType(PHPExcel_Style_Fill::FILL_SOLID);

		$objPHPExcel->setActiveSheetIndex(0);
		header('Content-Type: application/vnd.ms-excel');
		header('Content-Disposition: attachment;filename="' . $name . '.xls"');
		header('Cache-Control: max-age=0');
		$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
		$objWriter->save('php://output');
		exit;
	}
}

$info = new ExcelToArrary();
$data = [
	['uid' => 1, 'email' => '[email protected]', 'password' => 'md5'],
	['uid' => 2, 'email' => '[email protected]', 'password' => 'md5'],
	['uid' => 3, 'email' => '[email protected]', 'password' => 'md5'],
	['uid' => 4, 'email' => '[email protected]', 'password' => 'md5'],
	['uid' => 4, 'email' => '[email protected]', 'password' => 'md5'],
	['uid' => 4, 'email' => '[email protected]', 'password' => 'md5'],
];
$info->push($data);

参考：

http://www.jb51.net/article/43737.htm

http://www.cnblogs.com/freespider/p/3284828.html