為什么我的三元忽略第一個條件($order->status === "prepairing")？檢查訂單狀態(tài)時，它總是跳過第一個條件并立即進入第二個條件（并且始終將其視為真）$messageMiddle = ( ($order->status === "prepairing") ? " your prder is being prepared. Make your way towards the store."
: ($order->status === "complete") ?' your order is done! Please show your order-code at the store.'
: ' thank you for ordering ');
2 回答
jeck貓
TA貢獻1909條經(jīng)驗 獲得超7個贊
您需要按如下方式將括號中的每個下一個表達式分組。您忘記將第二個三元表達式括在括號中。
$messageMiddle = ($order->status === "prepairing") ? " your order is being prepared. Make your way towards the store." : (($order->status === "complete") ? ' your order is done! Please show your order-code at the store.' : ' thank you for ordering ');
但無論如何你都應(yīng)該避免這種方法。
子衿沉夜
TA貢獻1828條經(jīng)驗 獲得超3個贊
對訂單狀態(tài)做出反應(yīng)的更好方法是使用switch 語句。像這樣：
switch ($order->status) {
case "preparing" : $messageMiddle = " your order is being prepared. Make your way towards the store.";
break;
case "complete" : $messageMiddle = " your order is done! Please show your order-code at the store.";
break;
default : $messageMiddle = " thank you for ordering ";
break;
}
很容易看出如何擴展它以對其他狀態(tài)詞做出反應(yīng)。
請注意，我將“準備”更改為“準備”。
程序員追求的目標之一是簡潔的代碼。然而，較短的代碼并不總是更好的代碼。它可能可讀性較差，并且更難以維護和擴展。
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