1.在浏览器输出提供下载

复制代码 代码如下:
/**
 * 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;
}

2.保存到文件

复制代码 代码如下:
function export_csv($data, $title_arr, $file_name = "") {

    $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]);
    }

    $file_name = empty($file_name) ? date("Y-m-d-H-i-s", time()) : $file_name;
    file_put_contents($file_name, $csv_data) ;
}

调用示例（保存到文件）：
复制代码 代码如下:
$file_name="/var/www/tmp/test.csv" ;

$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"
            );
            $csvList = array(array("111", "title", "12", "100%", "23", "50%", "4")) ;
            export_csv($csvList, $header, $file_name) ;