是用PHP switch語句這個正確的方式

Question

嗨，我是新的PHP 如何將郵件發送到PHP中所選城市與缺乏自信的電子郵件ID與$主題$消息$頭

$selectcity = array("Bengaluru","Coimbatore","Chennai");                           
switch(trim($selectcity)) 
{ 
     case "Bengaluru": 
     { 
     $to = 'one@gmail.com''$subject''$message''$headers'; 
     break; 
     } 
     case "Coimbatore": 
     { 
     $to = 'two@gmail.com''$subject''$message''$headers'; 
       break; 
     } 
     case "Chennai": 
     { 
     $to = 'three@gmail.com''$subject''$message''$headers'; 
       break; 
     }  
    } 

Answer 1

裝飾（）不支持數組。在switch語句中，應該放置一個選定的結果，而不是可用的選項。

參考：http://php.net/manual/en/function.trim.php

例子：

假設你有一個表格發送選擇選項（例如下拉表單中箱）：

$selected = trim($_POST['ddb_city']); 
switch($selected) { 
    // the cases 
} 

此外，發送電子郵件，檢查PHP（http://php.net/manual/en/function.mail.php）中的郵件（）函數。你當前的語法是錯誤的。

Answer 2

您無法打開陣列。你需要有一個特定的值來打開，就像數組中的一個元素一樣。

$selectcity = array("Bengaluru","Coimbatore","Chennai");                           
$i=0; // this doesn't really make sense in the context, just used for the example 
switch(trim($selectcity[$i])) 
{ 
    case "Bengaluru": 
     $to = 'one@gmail.com'; 
     $subject="subject"; 
     $message="message"; 
     $headers="test"; 
     break; 

    case "Coimbatore": 
     $to = 'two@gmail.com'; 
     $subject="subject"; 
     $message="message"; 
     $headers="test"; 
     break; 
    case "Chennai": 
     $to = 'three@gmail.com'; 
     $subject="subject"; 
     $message="message"; 
     $headers="test"; 
     break; 
    default: 
     $to = 'four@gmail.com'; 
     $subject="subject"; 
     $message="message"; 
     $headers="test"; 
} 

Answer 3

您不需要每個case語句中的{}大括號。如果你從一個窗體中選擇的城市，也許像下面這樣將有助於：

<?php 
$selectedCity = $_GET['city']; 
switch(trim($selectedCity)) 
{ 
    case 'Chennai': 
     $to = "<contents>"; 
     break; 
    case 'Bengaluru': 
     $to = "<contents>"; 
     break; 
    default: // do whatever you want when they've selected something unexpected. 

     break; 
} 
?> 

Answer 4

$selectcity = array_map('trim',array("Bengaluru","Coimbatore","Chennai")); 

// the assumiing your value for city is coming form a form and you want to determine 
// address to send to  
switch($_POST['city'];) 
{ 
     case "Bengaluru": 
      $to = "'one@gmail.com''$subject''$message''$headers'"; 
      break; 

     case "Coimbatore": 
      $to = "'two@gmail.com''$subject''$message''$headers'"; 
      break; 

     case "Chennai": 
      $to = "'three@gmail.com''$subject''$message''$headers'"; 
      break; 

}