koşullu sorunu php

3 Cevap

Goal: User only selects one, only one option at a given time for the denomination, either some value of Nickels only, some value of Dimes only, or some value of Quarters only.

Problems: Önceki kodun sadece defaults to Nickels only?

Pre-existing condtion: If I select a different denomination, for example, Quarters only, I only get the values for Nickels, the same applies for Dimes?

Kod Parçacığı:

if($denomination["Nickels"] != NULL)

{
$value = $denomination["Nickels"];
echo $value . " is the value of selected Nickels";
}

else if ($denomination["Dimes"] != NULL)
{
$value = $denomination["Dimes"];
echo $value . " is the value of  selected Dimes";
}

else if ($denomination["Quarters"] != NULL)
{
$value = $denomination["Quarters"];
echo  $value . "is the value of selected Quarters";
}

3 Cevap

Kısa yapmak için:

<?php
$value = array_shift(array_filter($denomination));
echo  $value . "is the value of selected Quarters";

Bu ile bir koymak zorunda değilsiniz, her yeni eleman için eğer.

Açıkça null $ mezhep dizideki değerleri ayarlayarak mı?

Senin gibi bir şey çalışıyorum var ...

if($denomination["Nickels"])
{
$value = $denomination["Nickels"];
echo $value . " is the value of selected Nickels";
}

else if ($denomination["Dimes"])
{
$value = $denomination["Dimes"];
echo $value . " is the value of  selected Dimes";
}

else if ($denomination["Quarters"])
{
$value = $denomination["Quarters"];
echo  $value . "is the value of selected Quarters";
}

Elseif kullanarak çalışın, IFS ile değiştirin

if($denomination["Nickels"] != NULL)

{
$value = $denomination["Nickels"];
echo $value . " is the value of selected Nickels";
}

if ($denomination["Dimes"] != NULL)
{
$value = $denomination["Dimes"];
echo $value . " is the value of  selected Dimes";
}

if ($denomination["Quarters"] != NULL)
{
$value = $denomination["Quarters"];
echo  $value . "is the value of selected Quarters";
}

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