如果在PHP郵件中選中，只顯示下拉菜單內容

Question

我創建了一個通過PHP郵件發送的HTML表單。一切都很好，但我想簡化它，以便在發送的電子郵件中只顯示實際選擇的下拉菜單。現在，它的設置使得每個下拉菜單都顯示在電子郵件中，即使用戶選擇了0。我已經有很多下拉菜單了，還有一些需要添加的內容，這樣電子郵件會很快變得雜亂無章。

從邏輯上講，一個簡單的if語句應該可以完成這項工作，但我不確定該怎麼做，因爲我只有一行$email_body=""向電子郵件發送內容，並且我不能在if/else語句中插入if那裏。我研究了三元運算符，但我的PHP知識是有限的，我無法實現它的工作。謝謝！

HTML（簡體只是爲了得到一個想法）

<form>  
    <div class="tab-content clearfix"> 
     <div class="tab-pane active" id="carpet-cleaning"> 
      <h3 class="options-text">Carpet Cleaning Options</h3> 
       <!--how many bedrooms--> 
       <label class="control-label" for="carpet_cleaning">Bedrooms</label><br> 
       <select class="form-control-1" id="carpet_cleaning" name ="bedrooms_selection"> 
        <option value="0">0</option> 
        <option value="1">1</option> 
        <option value="2">2</option> 
        <option value="3">3</option> 
       </select> 
       <!--how many dining rooms--> 
       <br><label class="control-label" for="dining_rooms">Dining Rooms</label><br> 
       <select class="form-control-1" id="dining_rooms" name="dining_selection"> 
        <option value="0">0</option> 
        <option value="1">1</option> 
        <option value="2">2</option> 
        <option value="3">3</option> 
        <!--how many family rooms--> 
        <br><label class="control-label" for="family_rooms">Family Rooms</label><br> 
       <select class="form-control-1" id="family_rooms" name="family_room_selection"> 
        <option value="0">0</option> 
        <option value="1">1</option> 
        <option value="2">2</option> 
        <option value="3">3</option> 
       </select> 
    </div> 
</div> 
</form> 

PHP

<?php 
$bedrooms = $_POST['bedrooms_selection']; 
$diningRooms = $_POST['dining_selection']; 
$familyRooms = $_POST['family_room_selection']; 
$email_subject = "Price Quote"; 
$email_body="Carpet Services Needed: \n Bedrooms: $bedrooms \n Dining Rooms: $diningRooms \n Family Rooms: $familyRooms"; 
$to = "jon@example.com"; 
$headers = "From: $email"; 
mail($to, $email_subject, $email_body, $headers); 
header("Location: http://example.com"); 
?> 

因此簡化，如果用戶在下拉菜單中選擇0，我不希望它顯示在正在發送的電子郵件中。不能用只有一個不允許if/else語句的字符串來解決這個問題。

Answer 1

你可以用，如果再建EMAIL_BODY串

<?php 
if(!empty($_POST['bedrooms_selection'])){ 
$services[]='Bedrooms: '.$_POST['bedrooms_selection']; 
} 
if(!empty($_POST['dining_selection'])){ 
$services[]='Dining Rooms: '.$_POST['dining_selection']; 
} 
if(!empty($_POST['family_room_selection'])){ 
$services[]='Family Rooms: '.$_POST['family_room_selection']; 
} 
if($services){ 
$email_subject = "Price Quote"; 
$email_body='Carpet Services Needed: \n'.implode("\n",$services); 
$to = "jon@example.com"; 
$headers = "From: $email"; 
mail($to, $email_subject, $email_body, $headers); 
header("Location: http://example.com"); 
} 
else{ 
echo 'You have to select at least one service'; 
} 
?>