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Php 联系人表单不会提交并一直转到错误页面_Php_Html_Forms_Contact - Fatal编程技术网

Php 联系人表单不会提交并一直转到错误页面

Php 联系人表单不会提交并一直转到错误页面,php,html,forms,contact,Php,Html,Forms,Contact,当我填写联系人表单中的所有字段时,它会一直转到错误页面。我不知道为什么会这样。我希望联系人表单将所有信息发送到我的个人电子邮件中。我看过几乎所有的解决方案,但似乎无法解决问题 我的表格的代码是: <div id="form"> <form action="sendmail.php" method="post"> <p> <label for="name">Name:</label> <

当我填写联系人表单中的所有字段时,它会一直转到错误页面。我不知道为什么会这样。我希望联系人表单将所有信息发送到我的个人电子邮件中。我看过几乎所有的解决方案,但似乎无法解决问题

我的表格的代码是:

<div id="form">
    <form action="sendmail.php" method="post">
    <p>
        <label for="name">Name:</label>
        <input name="name" id="name" type="text" class="required">
        <span>Please enter your name</span>
    </p>
    <p>
        <label for="email">Email:</label>
        <input name="email" id="email" type="text" class="required"> 
        <span>Please enter a valid email address</span>
    </p>

    <p>
        <label for="subject">Subject:</label>
        <input name="subject" id="subject" type="text"> 
        <span>Please enter your subject</span>
    </p>
    <p>
        <label for="message">Message</label>
        <textarea name="message" id="message" class="required"></textarea> 
        <span>Please enter your message</span>
    </p>
    <p class="submit">
        <input type="submit" value="Submit" class="btn-submit">
    </p>
    </form>
</div>


姓名:
请输入您的姓名

电邮: 请输入有效的电子邮件地址

主题: 请输入您的主题

消息 请输入您的信息

我的PHP代码是:

<?php

// This function checks for email injection. Specifically, it checks for carriage returns 
$injections = array('(\n+)',
    '(\r+)',
    '(\t+)',
    '(%0A+)',
    '(%0D+)',
    '(%08+)',
    '(%09+)'
);

$inject = join('|', $injections);
$inject = "/$inject/i";
if(preg_match($inject,$str)) {
    return true;
}
else {
    return false;
}


// Load form field data into variables.
$name = $_REQUEST['name'] ;
$email = $_REQUEST['email'] ;
$subject = $_REQUEST['subject'] ;
$message = $_REQUEST['message'] ;


// If the user tries to access this script directly, redirect them to feedback form,
if (!isset($_REQUEST['email'])) {
    header( "Location: contact.html" );
}

// If the form fields are empty, redirect to the error page.
elseif (empty($email_address) || empty($comments)) {
    header( "Location: error.html" );
}

// If email injection is detected, redirect to the error page.
//elseif ( isInjected($email) ) {
    // header( "Location: error.html" );
}

// If we passed all previous tests, send the email!
else {
    mail( "f.ajibade@f-sharpmedia.com", "Feedback Form Results",
    $comments, "From: $email" );
    header( "Location: thankyou.html" );
}
?>

因为您没有将电子邮件检查逻辑放入函数中,返回语句将阻止代码执行,即使它是真的。正确的方法是:

if(preg_match($inject,$str)) {
  //process
}
else {
  exit();
}
编辑

下面是如何将该逻辑放入函数中

/**
 *This function checks for email injection. 
 *Specifically, it checks for carriage returns 
 *@return Boolean upon failure or success
 */
 function has_injection($email){
    $injections = array('(\n+)',
                        '(\r+)',
                        '(\t+)',
                        '(%0A+)',
                        '(%0D+)',
                        '(%08+)',
                        '(%09+)'
                 );

    $inject = join('|', $injections);
    $inject = "/$inject/i";
    if(preg_match($inject,$email)) {
        return true;
    }
    else {
        return false;
    }
 }
然后使用它:

<?php

if(!has_injection($_REQUEST['email']){
    //process code
}else{
    die('terminating script because of email injection!');
}

代码很乱

美元在哪里

检查它是否有注入:
如果(preg_match($inject,$str))
,那么$str是什么

然后你选择
empty($email_address)| empty($comments)

但是这些不是您设置的变量(您设置了
$email=$\u REQUEST['email'],$message=$\u REQUEST['message']
等等)

这应该做什么:
否则{return false;}
为什么要执行手动注入检查?有更好的库(例如,随着检测到更多注入机会而改进)?