Question

我有以下功能：

class TariffFareController {

public static function checkRunin($fieldPickup) {

    $runInThreshold = 5;
    $fieldDestination = 6;

    if ($fieldPickup > $runInThreshold && $fieldDestination > $runInThreshold)

    {

        if ($fieldPickup > $fieldDestination)

        {

            $distance = $fieldPickup - $runInThreshold;

        } else {

            $distance = $fieldDestination - $runInThreshold;

        }


       }
}

我想将$distance传递给此函数： -

private static function getFare($int_terminate) {

    //CODE
    //eg// if($distance > 5) {

        //do something

    }

}

我该怎么做？

Answer 1

return来自第一个函数的值：

public static function checkRunin($fieldPickup) {
    $runInThreshold = 5;
    $fieldDestination = 6;

    if ($fieldPickup > $runInThreshold && $fieldDestination > $runInThreshold)
    {
        if ($fieldPickup > $fieldDestination)
        {
            $distance = $fieldPickup - $runInThreshold;
        } else {
            $distance = $fieldDestination - $runInThreshold;
        }
    }
    return $distance;
}

// Get $distance from checkRunin()
$distance = $obj->checkRunin($fieldPickup);
// Pass $distance as a parameter
$obj->getFare($distance);

Answer 2

当你说它不起作用时...它基本上是因为$diffrent未正确声明所以你有scope个问题

我的假设

checkRunin和getFare都是同一个班级的方法TariffFareController
$int_terminate与$distance

来自您的班级

$distance未声明为static
getFare正在尝试访问尚未声明的$distance

简单解决方案

class TariffFareController {
    private static $distance = 0;

    public static function checkRunin($fieldPickup) {
        $runInThreshold = 5;
        $fieldDestination = 6;
        if ($fieldPickup > $runInThreshold && $fieldDestination > $runInThreshold) {
            if ($fieldPickup > $fieldDestination) {
                self::$distance = $fieldPickup - $runInThreshold;
            } else {
                self::$distance = $fieldDestination - $runInThreshold;
            }
        }
        printf("self:\$distance = %d ; // Called %s :\n", self::$distance, __METHOD__);
    }

    public static function getFare($int_terminate) {
        printf("self:\$distance = %d ; // Called %s :\n", self::$distance, __METHOD__);
    }
}

TariffFareController::checkRunin(10);
TariffFareController::getFare(2);

输出

self:$distance = 5 ; // Called TariffFareController::checkRunin :
self:$distance = 5 ; // Called TariffFareController::getFare :

Answer 3

class TariffFareController {

public static $distance = 0;
public static function checkRunin($fieldPickup) {

$runInThreshold = 5;
$fieldDestination = 6;

if ($fieldPickup > $runInThreshold && $fieldDestination > $runInThreshold)

{

    if ($fieldPickup > $fieldDestination)

    {

        self::$distance = $fieldPickup - $runInThreshold;

    } else {

        self::$distance = $fieldDestination - $runInThreshold;

    }


   }
}

然后

private static function getFare($int_terminate) {

//CODE
//eg// if(self::$distance > 5) {

    //do something

}

}

Answer 4

public static function checkRunin($fieldPickup) {
$runInThreshold = 5;
$fieldDestination = 6;

if ($fieldPickup > $runInThreshold && $fieldDestination > $runInThreshold)
{
    if ($fieldPickup > $fieldDestination)
    {
        $distance = $fieldPickup - $runInThreshold;
    } else {
        $distance = $fieldDestination - $runInThreshold;
    }
}
return $distance;

}

// Get $distance from checkRunin()
$distance = $obj::checkRunin($fieldPickup);
// Pass $distance as a parameter
$obj::getFare($distance);

这是@John Conde的答案只是不要忘记静态范围使用::

Answer 5

我不知道为什么上面的答案对你不起作用。但试试这个想法 class someThing {protected $ distance;受保护的函数initDistance（）{$ this-＆gt; distance = 5; } protected function useDistance（）{if（$ this-＆gt; distance＆lt; 5）{// do anything}} $ obj = new someThing（）; $ obj-＆GT; initDistance（）; $ obj-＆GT; useDistance（）;

Answer 6

是否无法按如下方式使用会话： -

session_start();

public static function checkRunin($fieldPickup) {

    $runInThreshold = 5;
    $fieldDestination = 6;
    $_SESSION['runin_distance'] = 0;

    if ($fieldPickup > $runInThreshold && $fieldDestination > $runInThreshold) {

        if ($fieldPickup > $fieldDestination) {

            $_SESSION['runin_distance'] = $fieldPickup - $runInThreshold;


        } else {

            $_SESSION['runin_distance'] = $fieldDestination - $runInThreshold;

        }

    }

}

然后......

private static function getFare($int_terminate) {

    if($_SESSION['runin_distance'] > 5) {

    //do something

    }

}

Answer 7

将距离创建为全局变量，在checkRunIn中设置它，然后在getFare需要时访问它

在PHP函数之间传递变量

7 个答案: