Question

我是php的新手我想尝试将手机转换为时区转换器。我收到错误未定义的变量＆＃39; $ result＆＃39;在第49行我该如何解决它。如果你能找到我做过的任何其他错误的话请查看我正在制作的错误电话号码：

$tier0_languages = array("en_US");
$tier1_languages = array("ja_JP", "de_DE", "fr_FR");
$tier2_languages = array("it_IT","es_ES","es_MX","nl_NL","pt_BR","da_DK","fi_FI","nb_NO","sv_SE");
$tier3_languages = array("ko_KR","zh_CN","zh_TW");
$tier4_languages = array("cs_CZ","ru_RU","tr_TR","pl_PL","hu_HU","uk_UA","fr_MA","en_AE","en_IL");

$tier = array_merge($tier0_languages,$tier1_languages,$tier2_languages,$tier3_languages,$tier4_languages);

uasort($arr, function ($a,$b) use ($tier){
    foreach($tier as $value){
        if($value == $a['primary_language']){
            return 0;
            break;
        }
        if($value == $b['primary_language']){
            return 1;
            break;
        }
    }
});

print_r($arr);

谢谢你的帮助！

Answer 1

我相信这样会有效。我不确定$ code，如果他包含正确的信息，你可以通过echo $ code来检查。

    if(preg_match($pattern, $ccode, $matches))
    {
        $code = $matches[0];
    } else { $code = substr($ccode, 0, 4); }

    $q = "SELECT nicename FROM country WHERE phonecode=$code";
    if($query = $db->query($q)) 
    {
        $record = $query->fetch_assoc();
        echo '<pre>';
        print_r($record);
    } else { echo "<br/>NO RECORD"; }


    $abb = "SELECT zone_id FROM zone INNER JOIN country on country.country_code = zone.country_code
            WHERE country.country_name = '" . $record['nicename'] . "'";
    if($query = $db->query($abb)) 
    {
        $result = $query->fetch_assoc();
        echo '<pre>';
        print_r($result);
        //Here $result will exist!
    } else { echo "<br/>NO RECORD"; }
    // You had your $result here, and here, the result may not exist, 
    // depending if the query succeeded or not.
    // Same counts for the query above.

据我所知，有两个问题。

1是你试图打印$ record，而$ record可能不存在，并且$ result的结果相同。

2是区域查询，如果检查列/字段是否等于某个字符串，则确保该字符串在其周围有引号。所以country_name ='something'。你在$ record ['nicename']附近没有这些引号，所以无论是$ record ['nicename']，他都认为这是一个列/字段，但不是值得检查的。

从mysqli获取数据时未定义的变量

1 个答案: