使用echo $ variablename时,表单变量无法打印

Question

我正在创建一个读取用户名和电子邮件的表单,然后通过PHP文件向他们发送凭证,如下所示:

<?php

  $deal = "offer or discount details";

  $to = "$email";
  $subject = "Tonights wheree voucher - $deal";
  $message = '
  <html>
    <body>
        Test email sent to <?php echo $email; ?>.
    </body>
  </html>
  ';

  $headers = "From: wheree <no-reply@wheree.co.uk>" . "\r\n" .
             "Content-type: text/html" . "\r\n";

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

?>

表格:

<form class="cmxform" id="details-form" method="get" action="test.php">
                 <fieldset>
                       <p>
                         <input id="name" name="name" title="Please enter your full name. " size="18" class="tagcheck" minlength="5" maxlength="60" value="Name" onfocus="if(this.value==this.defaultValue){this.value=''};" onblur="if(this.value==''){this.value=this.defaultValue};" />
                       </p>
                       <p>
                         <input id="email" name="email" size="18" title="Please enter a valid email address. " class="required email" value="Email" onfocus="if(this.value==this.defaultValue){this.value=''};" onblur="if(this.value==''){this.value=this.defaultValue};" />
                       </p>
                       <p class="tickbox-wrapper">
                       <input id="accept-tick" type="checkbox" name="vehicle" class="required" title="You must accept our Terms & Conditions. " /> I accept the voucher usage <a href="/voucher-terms-and-conditions" alt="terms" class="terms-link">Terms & Conditions</a>.
                       </p>

                       <div id="RegisterErrors" style="display:none"></div>

                       <p>
                         <input class="submit" type="submit" value="Continue"/>
                       </p>
                 </fieldset>
</form>

这工作正常,但没有回应$email收到的电子邮件中的变量？我也尝试过使用$_GET["email"],但再次没有成功.

在此先感谢您的帮助.

Answer 1

您正试图echo在单引号字符串中放置一个语句.将其连接在:

  $message = '
  <html>
    <body>
        Test email sent to ' . $email . '.
    </body>
  </html>
  ';

或者更好的是,切换到双引号字符串$message,其中$email可以插值.

  $message = "
  <html>
    <body>
        Test email sent to $email.
    </body>
  </html>
  ";

有关变量插值以及单引号和双引号之间差异的更多信息,请参阅有关字符串的PHP手册.

如果你有很多变量和多行是第三种选择,那就是HEREDOC语法,它可以完全避免引用.

  $message =<<<MESSAGE
  <html>
    <body>
        Test email sent to $email.
    </body>
  </html>
MESSAGE;
// Note that the MESSAGE; above MUST be at the start of its own line, with no indentation