摘要：簡易抓取國家統計局的省市信息注代碼異常處理有待完善不喜勿噴。感謝超時設置抓取地址匹配異常得到省份信息獲取城市信息拼湊城市信息請求地址市轄區請求設置抓取的設置頭文件的信息作為數據流輸出設置獲取的信息以文件流的形式返回，而不是直接輸出。

header("Content-Type: text/html;charset=UTF-8");
// 超時設置
ini_set("max_execution_time", "0");
//抓取地址
$url = "http://www.stats.gov.cn/tjsj/tjbz/tjyqhdmhcxhfdm/2018/";
$data = curlGet($url);
$data = iconv("GBK", "UTF-8//IGNORE",$data);
preg_match_all("/provincetr">(.*?)/", $data, $matches);
if (empty($matches)) {
    return "匹配異常";
}

$data2show = returnArr($matches[1]);

//得到省份信息
foreach ($data2show as $key => $val) {
    preg_match("/="(d{2}).html/", $val, $sz);
    preg_match("/">(.{1,30})
 $val) {
    //拼湊城市信息請求地址
    $cityUrl = $url.$key.".html";
    $data = curlGet($cityUrl);
    $data = iconv("GBK", "UTF-8//IGNORE",$data);

    preg_match_all("/citytr">(.*?)/", $data, $matches);

    foreach($matches[1] as $k => $v){
        // echo $v;exit;
        preg_match_all("/="(d{2})/(d{4}).html">(.*?)/", $v, $info);
        $city[$key][$k]["province_code"] = $info[1][1];
        $city[$key][$k]["province_name"] = $val;
        $city[$key][$k]["city_code"] = $info[2][1];
        $city[$key][$k]["city_name"] = ($info[3][1] === "市轄區") ? $val : $info[3][1];
        // print_r($city);exit;
    }
    // $cityData[$key] = $matches[1];
}
$cityArr = arr2ToArr1($city);
export_csv($cityArr);exit;


//curl get請求
function curlGet($url)
{
    $curl = curl_init();
    //設置抓取的url
    curl_setopt($curl, CURLOPT_URL, $url);
    //設置頭文件的信息作為數據流輸出
    // curl_setopt($curl, CURLOPT_HEADER, 1);
    //設置獲取的信息以文件流的形式返回，而不是直接輸出。
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    //執行命令
    $data = curl_exec($curl);
    //關閉URL請求
    curl_close($curl);
    //顯示獲得的數據
    return $data;
}

//傳入內容，返回數組
function returnArr($content)
{
    foreach ($content as $key => $val) {
        $arr[$key] = explode("", "<" . trim($val, ""));
    }
    $data2show = arr2ToArr1($arr);
    return $data2show;
}

//二維數組轉化成一維數組
function arr2ToArr1($arr)
{
    return array_reduce($arr, "array_merge", array());
}

//數據導出到csv
function export_csv($data) {
    $path = $_SERVER["DOCUMENT_ROOT"]."/csv/".date("Y-m-d",time())."/";
    if (!is_dir($path)){ //判斷目錄是否存在 不存在就創建
        mkdir($path,0777,true);
    }
    $filename = $path.time().".csv"; //設置文件名

    header( "Content-Type: text/csv;charset=utf-8" );
    header( "Content-Disposition: attachment;filename="$filename"" );
    header("Pragma: no-cache");
    header("Expires: 0");

    $fp= fopen($filename, "w");
    // 對于用 wps 和編輯器打開無亂碼但是用 excel 打開出現亂碼的問題,可以添加以下一行代碼解決問題
    fwrite($fp, chr(0xEF).chr(0xBB).chr(0xBF));
    foreach ($data as $fields) {
        fputcsv($fp, $fields);
    }
    fclose($fp);
}