PHP导出数据到CSV文件函数/方法

如果不清楚什么是CSV文件，可看如下文章介绍  CSV格式的是什么文件？CSV是什么的缩写？

/**
 * 导出数据到CSV文件
 * @param	array	$data		数据
 * @param	array	$title_arr	标题
 * @param	string	$file_name	CSV文件名
 */
function export_csv(&$data, $title_arr, $file_name = ‘‘) {
    ini_set("max_execution_time", "3600");

    $csv_data = ‘‘;

    /** 标题 */
    $nums = count($title_arr);
    for ($i = 0; $i < $nums - 1; ++$i) {
        $csv_data .= ‘"‘ . $title_arr[$i] . ‘",‘;
    }

    if ($nums > 0) {
    	$csv_data .= ‘"‘ . $title_arr[$nums - 1] . ""
";
    }

    foreach ($data as $k => $row) {
        for ($i = 0; $i < $nums - 1; ++$i) {
            $row[$i] = str_replace(""", """", $row[$i]);
            $csv_data .= ‘"‘ . $row[$i] . ‘",‘;
        }
        $csv_data .= ‘"‘ . $row[$nums - 1] . ""
";
        unset($data[$k]);
    }

    $csv_data = mb_convert_encoding($csv_data, "cp936", "UTF-8");

    $file_name = empty($file_name) ? date(‘Y-m-d-H-i-s‘, time()) : $file_name;

    if (strpos($_SERVER[‘HTTP_USER_AGENT‘], "MSIE")) { // 解决IE浏览器输出中文名乱码的bug
    	$file_name = urlencode($file_name);
    	$file_name = str_replace(‘+‘, ‘%20‘, $file_name);
    }

    $file_name = $file_name . ‘.csv‘;
    header("Content-type:text/csv;");
    header("Content-Disposition:attachment;filename=" . $file_name);
    header(‘Cache-Control:must-revalidate,post-check=0,pre-check=0‘);
    header(‘Expires:0‘);
    header(‘Pragma:public‘);
    echo $csv_data;
}

应用举例：

$header = array(
	‘0‘		=> ‘参数ID‘,
	‘1‘		=> ‘参数名称‘,
	‘2‘		=> ‘统计次数‘,
	‘3‘		=> ‘统计次数百分比‘,
	‘4‘		=> ‘唯一用户数‘,
	‘5‘		=> ‘唯一用户数百分比‘,
	‘6‘		=> ‘人均次数‘
);

/** 列表项 */
foreach ($list as $key => $row){
	$csvList[] = array(
		‘0‘		=> $row[‘param_key‘],
		‘1‘		=> $row[‘param_name‘],
		‘2‘		=> $row[‘nums‘],
		‘3‘		=> $row[‘percent_nums‘] . ‘%‘,
		‘4‘		=> $row[‘total_users‘],
		‘5‘		=> $row[‘percent_total_users‘] .‘%‘,
		‘6‘		=> $row[‘avg‘]
	);
}

/** 导出csv */
$title = str_replace(‘ ‘,‘-‘, $title);
export_csv($csvList, $header, $title);