Question

以下函数的PHP7方法是什么，它检查值是否设置并且等于特定值？

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public function getResponseFormat($request)
{
    $responseFormat = 'php';

    if(isset($request['controller']['name']) && $request['controller']['name'] == 'email') {

        if(isset($request['controller']['options']['responseFormat'])) {

            $responseFormat = $request['controller']['options']['responseFormat'];
        }
    }

    return $responseFormat;
}

Answer 1

If you want to make use of the new NULL COALESCE operator, you can write the method like this:

public function getResponseFormat($request)
{
    if ($request['controller']['name'] ?? null == 'email') {
        return $request['controller']['options']['responseFormat'] ?? 'php';
    }

    return 'php';
}

$x ?? null evaluates to null if $x is not set, and $x ?? 'php' evaluates to 'php' if $x is not set.

You could also put everything in one line with an additional ternary operator ?: to have a single return but that would be at the cost of readability.

什么是PHP7检查值是否设置并且等于特定值的方法？

1 个答案: