Question

为什么此代码导致语法错误？为什么我不能抓住这个例外？

protected function RunQuery($sql) {
    $pdo = $this->conn;
    $stmt = $pdo->prepare($sql);

    if($stmt) {
        $stmt->execute($sql);
    } else {
        print_r("Unable to prepare the query");
    }
    catch(PDOException $e) {
        print_r($e);
        exit(0);
    }
}

Answer 1

在添加catch块之前，您需要有一个try块。您需要将代码更改为以下内容：

#views.py

import json

def get_city_names(request):

    #what was in the question an array is now a python list of dicts.
    #it can also be in some other file and just imported.
    all_city_names = [
    { good_name: 'Mallorca', input_name: 'Palma de Mallorca' },
    { good_name: 'Mallorca', input_name: 'Mallorca' },
    { good_name: 'Mallorca', input_name: 'Majorca' },
    # etc
    ]

    if request.is_ajax():
        q = request.GET.get('term', '')

        city_names = [c['good_name'] for c in all_city_names if q in c["input_name"]]
        city_names = set(city_names) #removing duplicates

        results = []
        for cn in city_names:
            cn_json = {'value': cn}
            results.append(cn_json)
        data = json.dumps(results)
    else:
        data = 'fail'
    mimetype = 'application/json'
    return HttpResponse(data, mimetype)

有关try＆amp; amp ;;的更多信息可以在php documentation。

中找到catch以及如何处理异常

Answer 2

好像你在上面的线上错过了一个'}'。

解析错误：语法错误，意外＆＃39; catch＆＃39; （T_CATCH）

2 个答案: