在switch語句中更新PHP變量（簡單）

Question

在PHP中，我在一個名爲$ chickens的開關之外有一個值，等於1.在通過switch語句之後，我希望值更改爲b。 。

//original value of var 
$chickens = 1; 

switch ($chickens) { 
    case "0": 
    $chickens === "a"; 
    break; 
    case "1": 
    $chickens === "b"; 
    break; 
    case "2": 
    $chickens === "c"; 
    break; 
    case "3": 
    $chickens === "b"; 
    break; 
} 

//want this to be "b" defined in switch 
echo $chickens; 

出於某種原因，該值不更新:(任何想法

Answer 1

您使用了錯誤的操作=是賦值運算符===是比較運算符：。

//original value of var 
$chickens = 1; 

switch ($chickens) { 
    case "0": 
    $chickens = "a"; 
    break; 
    case "1": 
    $chickens = "b"; 
    break; 
    case "2": 
    $chickens = "c"; 
    break; 
case "3": 
    $chickens = "d"; 
    break; 
} 

//want this to be "b" defined in switch 
echo $chickens;