需要一些幫助。用php if else語句

Question

當用戶選擇等於銷售量的單選按鈕時，它將信息發送到銷售部門，工作正常。

我需要當用戶選擇支持部門必須輸入他們需要支持的設備的5位序列號。序列號只能在3到5個數字之間。如果串行不是3到5數字示例：

在此框中如果數字是123提交，如果12324提交，如果x3423死亡，如果12死亡，如果123456死亡。我也需要接受數字。

我能做到這一點

if($selected == 'sales') { 
    $body = "From: $name_field\n E-Mail: $email_field\n Address: $address\n City: $city\n State: $state\n PostalCode: $zip\n Department $selected\n How did you about us: $hear\n Country: $country\n Comments: $comment"; 
    mail($to, $subject, $body); 
    header("Location: http://url/"); 
}  
else if($selected == 'support') { 
    if(preg_match("/^\d{3}$|^\d{5}$/", $_POST['serial']) === 0) { 
     $body = "From: $name_field\n E-Mail: $email_field\n Address: $address\n City: $city\n State: $state\n PostalCode: $zip\n Department $selected\n How did you about us: $hear\n Country: $country\n Serial Number: $serial\n Comments: $comment"; 
     mail($toa, $subject2, $body); 
     header("Location: http://url/"); 
    } 
    else { 
     die('<script type="text/javascript"> alert("Serial Number is invalid");</script>'); 
    } 
} 
} 

Answer 1

您目前有如果正則表達式不匹配它發送電子郵件。你的正則表達式也是錯誤的。還有一些小事情。

試試這個：

switch($selected) { 
    case "sales": 
     $body = "From........................"; 
     mail($to,$subject,$body); 
     header("Location: ....."); 
     exit; 
    case "support": 
     if(preg_match("(^[0-9]{3,5}$)",$_POST['serial'])) { 
      $body = "From......................."; 
      mail($toa,$subject2,$body); 
      header("Location: ......"); 
      exit; 
     } 
     else { 
      die("Serial Number is invalid!"); 
     } 
    default: 
     die("Invalid department selection."); 
}