有條件地附加到PHP中的字符串

Question

我有一個電子郵件表單工作得很好。我想添加一個功能，如果某些字段沒有填寫，它不會在電子郵件中發送它們爲空。如果這些字段沒有填寫，我怎樣才能讓這些字段不顯示。這是我的完整代碼。

$message = 'Hello,<br /><br /> 

First Name: '.$_POST['first_name'].'<br /> 

Last Name: '.$_POST['last_name'].'<br />     

Email: '.$_POST['email'].'<br /> 

Address: '.$_POST['address'].'<br /> 

Phone: '.$_POST['phone'].'<br /> 

City: '.$_POST['city'].'<br /> 

State: '.$_POST['state'].'<br /> 

Zip Code: '.$_POST['zipcode'].'<br /> 

Country: '.$_POST['country'].'<br /> 

Preferred Method of Contact: '.$_POST['perferred'].'<br /> 

Comments/Questions:<br /> 
'.$_POST['description'].'<br /><br /> 


//This is the section I am speaking about   
Interested in: <br /> 

'.$_POST['nh_home'].'<br /> 

'.$_POST['nh_lot'].'<br /> 

'.$_POST['nh_townhouse'].'<br /> 

'.$_POST['nh_condo'].'<br /> 

'.$_POST['nh_marina'].'<br /> 

'.$_POST['nh_beachclub'].'<br /> 

'.$_POST['nh_resale'].'<br /><br /> 

// End Section   



How did you hear about us? <br /> 
'.$_POST['how_about'].'<br /> 


; 


$to  = 'email@domain.com'; 
$subject = 'Splash Page'; 

$headers = 'MIME-Version: 1.0' . "\r\n"; 
$headers .= 'Content-type: text/html; charset=utf-8' . "\r\n"; 
$headers .= 'From: Meredith Bay <info@website.com>' . "\r\n";   


$send = mail($to, $subject, $message, $headers); 


if($send){ 
header('Location: http://www.website.com/thank-you/'); 
exit; 
} 
else{ 
echo "error"; 
} 

Answer 1

想必您更完整的代碼如下所示：

$email = 'some markup' . $_POST['nh_home'] . '<br />'; 
$email .= 'some markup' . $_POST['nh_lot'] . '<br />'; 
$email .= 'some markup' . $_POST['nh_townhouse'] . '<br />'; 
// etc... 

你可以簡單地在那些之間引入條件檢查：

$email = ''; 
if ($_POST['nh_home']) { 
    $email .= 'some markup' . $_POST['nh_home'] . '<br />'; 
} 
if ($_POST['nh_lot']) { 
    $email .= 'some markup' . $_POST['nh_lot'] . '<br />'; 
} 
if ($_POST['nh_townhouse']) { 
    $email .= 'some markup' . $_POST['nh_townhouse'] . '<br />'; 
} 
// etc... 

Answer 2

只是檢查，如果該值不爲空：

if ($_POST['nh_home'])  echo 'Home:  '.$_POST['nh_home'].'<br />'; 
if ($_POST['nh_lot'])  echo 'Lot:  '.$_POST['nh_lot'].'<br />'; 
if ($_POST['nh_townhouse']) echo 'Townhouse: '.$_POST['nh_townhouse'].'<br />'; 
if ($_POST['nh_condo'])  echo 'Condo:  '.$_POST['nh_condo'].'<br />'; 
if ($_POST['nh_marina'])  echo 'Marina: '.$_POST['nh_marina'].'<br />'; 
if ($_POST['nh_beachclub']) echo 'Beachclub: '.$_POST['nh_beachclub'].'<br />'; 
if ($_POST['nh_resale'])  echo 'Resale: '.$_POST['nh_resale'].'<br />'; 

Answer 3

你可以使用

$message = 'Hello,<br /><br />'; 

if(empty($_POST['first_name'])) { 
    $message .= 'First Name: '.$_POST['first_name'].'<br />' 
} 

這只是一個基本條件。爲POST數據中的每個元素執行此操作。