也许是一个简单的数组问题

Question

我这里有点问题。我已经检查了很多次错误，但我无法让它发挥作用。所以我必须创建一个程序，读取3行输入。这是关于一家杂货店在一周和周末有两种不同的价格。我必须让它只输出水果的价格*数量，如果当天或水果不存在输出"错误"。我真的很困惑为什么我的代码不起作用。我刚开始使用PHP，所以可能我没有太多的经验。

$type = strtolower(readline());
$day = strtolower(readline());
$quantity = floatval(readline());
$days = array("monday", "tuesday", "wednesday", "thursday", "friday");
$weekend = array("saturday", "sunday");
$fruit_normal = array(
"2.50" => "banana",
"1.20" => "apple",
"0.85" => "orange",
"1.45" => "grapefruit",
"2.70" => "kiwi",
"5.50" => "pineapple",
"3.85" => "grapes"
);
$fruit_we = array(
"2.70" => "banana",
"1.25" => "apple",
"0.90" => "orange",
"1.60" => "grapefruit",
"3.00" => "kiwi",
"5.60" => "pineapple",
"4.20" => "grapes"
);
$search = array_search($day, $days);
$search1 = array_search($day, $weekend);
$search2 = array_search($type, $fruit_normal);
$search3 = array_search($type, $fruit_we);
if ($search != NULL && $search2 != NULL) {
$price = $search2 * $quantity;
$formatted = number_format($price, 2);
print $formatted;
} elseif ($search1 != NULL && $search3 != NULL) {
$price = $search3 * $quantity;
$formatted = number_format($price, 2);
print $formatted;
} elseif ($search == NULL && $search1 == NULL && $search2 == NULL && $search3 == NULL) {
echo "error";
}

Answer 1

所以这就是我首先解决问题的方法，我只从1开始制作所有由参数组成的数组。然后在检查array_search的结果时，将所有的NULL值替换为FALSE。我仍然不确定真正的问题是什么，但现在我接受这就是事实。

$type = strtolower(readline());
$day = strtolower(readline());
$quantity = floatval(readline());    
$days = array(1 => "monday", "tuesday", "wednesday", "thursday", "friday");
$weekend = array(1 =>"saturday", "sunday");   
$fruit_normal = array(
"2.50" => "banana",
"1.20" => "apple",
"0.85" => "orange",
"1.45" => "grapefruit",
"2.70" => "kiwi",
"5.50" => "pineapple",
"3.85" => "grapes"
);
$fruit_we = array(
"2.70" => "banana",
"1.25" => "apple",
"0.90" => "orange",
"1.60" => "grapefruit",
"3.00" => "kiwi",
"5.60" => "pineapple",
"4.20" => "grapes"
);    
$search = array_search($day, $weekend);
$search1 = array_search($type, $fruit_normal);
$search2 = array_search($type, $fruit_we);
$search3 = array_search($day, $days);    
if($search1!= FALSE && $search3 != FALSE ){
$price = $search1 * $quantity;
echo number_format($price, 2); 
}elseif($search != FALSE && $search2 != FALSE){
$price = $search2 * $quantity;
echo number_format($price, 2);
}elseif($search == FALSE && $search3 == FALSE){
echo "error";
}elseif($search1 == FALSE && $search2 == FALSE){
echo "error";
}