php - 如何在mail（）中插入来自电子邮件地址的变量？

Question

如何在 PHP mail() 函数中插入可变形式的电子邮件地址？

$form_data =array();
$form_data['firstName'] = 'Joe';
$form_data['surname'] = 'Do';
$form_data['email'] = 'info@Domain';
print "From: ".$form_data['firstName']." ".$form_data['surname']." <".$form_data['email'].">\n";

当我环绕 <> 时，我尝试过的电子邮件地址不显示

print "<{$form_data['email']}>";
print '<'.$form_data['email'].'>';

但我不知道如何解决这个问题

完整代码（使用 Wordpres wp_mail() 函数）；

        //Send mail
$recipients[] = get_bloginfo('admin_email');
$email_subject = "Contactform - ". get_bloginfo('name');
$email_message = $tpl;      
$headers[] = "From: ".$form_data['firstName']." ".$form_data['surname']." <".$form_data['email'].">\n";       
$headers[] = "Content-Type: text/html\n";
$send =  wp_mail($recipients, $email_subject, $email_message, $headers);    

Answer 1

尝试将<and替换为>HTML 转义字符，如下所示：

print "From: ".$form_data['firstName']." ".$form_data['surname']." <".$form_data['email'].">\n";

<=<和>=>

Answer 2

如果要显示它，请使用htmlspecialchars() ：

print "From: ".$form_data['firstName']." ".$form_data['surname']." ".htmlspecialchars("<{$form_data['email']}>");