Question

我如何制作＆＃34;电子邮件＆＃34;字段不是必须的？即使某人没有填写该字段，表格也应提交。

在下面的代码中，＆＃34;电子邮件＆＃34;字段是强制性的。

我尝试添加!isset电子邮件字段，以便$email_from得到“＃34;空白”字样，但它对我不起作用。

<?php
if(isset($_POST['name'])) {



    // EDIT THE 2 LINES BELOW AS REQUIRED

    $email_to = "aaaaa@aaaaa.com";

    $email_subject = "Messeage from your site";




    function died($error) {

    ?>


 <?php

        die();

    } 



    // validation expected data exists

    if(!isset($_POST['name']) ||

        //!isset($_POST['email']) || /* i tried to comment this line, but didnt work. */

        !isset($_POST['telephone']))
{

        died('We are sorry, but there appears to be a problem with the form you submitted.');       

    }


    $name = $_POST['name']; // required

    $email_from = $_POST['email']; // required

    $telephone = $_POST['telephone']; // not required


    $error_message = "";

    $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';

  if(!preg_match($email_exp,$email_from)) {

    $error_message .= 'The Email Address you entered does not appear to be valid.<br />';

  }





  if(strlen($error_message) > 0) {

    died($error_message);

  }

    $email_message = "Form details below.\n\n";



    function clean_string($string) {

      $bad = array("content-type","bcc:","to:","cc:","href");

      return str_replace($bad,"",$string);

    }



    $email_message .= "First Name: ".clean_string($name)."\n";

    $email_message .= "Email: ".clean_string($email_from)."\n";

    $email_message .= "Telephone: ".clean_string($telephone)."\n";






// create email headers

$headers = 'מאת: '.$email_from."\r\n".

'חזור ל: '.$email_from."\r\n" .

'X-Mailer: PHP/' . phpversion();

@mail($email_to, $email_subject, $email_message, $headers);  

?>
 <?php
    echo '<META HTTP-EQUIV="Refresh" Content="0; URL=thank_you.html">';    
    exit;   
    ?>



<?php



}

?>

Answer 1

 if(!isset($_POST['name']) ||
 !isset($_POST['telephone'])){

 if(isset($_POST['email'])){
//all code for email inside here
}
}

这应该是技巧，而$ _POST ['email']是空的，它不应该打扰你了。

Answer 2

preg_match上的$email_form使其成为必需。

如果您首先检查是否设置了$email_form，并且执行preg_match它必须有效。

像这样：

if(!empty($_POST['email'])){
     if(!preg_match($email_exp,$email_from)) {
         $error_message .= 'The Email Address you entered does not appear to be valid.<br/>';
     }
} else {
     $email_from = '';
}

Answer 3

我做了，而且有效：

    if(!empty($_POST['email'])){
  if(!preg_match($email_exp,$email_from)) {

    $error_message .= 'The Email Address you entered does not appear to be valid.<br />';

  }
    }

Answer 4

使用php5中的FILTER_VALIDATE_EMAIL检查电子邮件是否有效

if(isset($_POST['email']))
{
  $email = $_POST['email'];
  if(!filter_var($email, FILTER_VALIDATE_EMAIL))
  {
    echo $email." E-mail is not valid.";
  }
  else
  {
    echo $email." E-mail is valid.";
  }
}

PHP联系表单 - 使字段不是必需的

4 个答案: