重新获取网站的图标 - Re-get icon for website

我使用PHP通过设置我的收藏夹

<link rel="shortcut icon" href="<?php echo "/SysFiles/img/ico/". $favicon; ?>">

这在Firefox上可以正常工作，但在Chrome上无法正常工作。如何让Chrome在图标更改时重新生成图标？

编辑：这个文件位于/SysFiles/navbar.php中，它包含在服务器上的每个页面上，包括我在上测试的页面

编辑：导航栏.php

    <?php
        session_start();
        if ($_COOKIE['darktheme'] == "1") {
          $_SESSION['darktheme'] = true;
          $_SESSION['SETHEME'] = 1;
        } else {
          $_SESSION['darktheme'] = false;
          $_SESSION['SETHEME'] = 1;
        }
    $addr = "http://" . $_SERVER['SERVER_ADDR'];
    $myfile = fopen("$addr/Data/Points/makarios", 'r');
    $makarios = fgets($myfile);
    fclose($myfile);
    $myfile = fopen("$addr/Data/Points/sozo", 'r');
    $sozo = fgets($myfile);
    fclose($myfile);
    $myfile = fopen("$addr/Data/Points/kaleo", 'r');
    $kaleo = fgets($myfile);
    fclose($myfile);
    $myfile = fopen("$addr/Data/Points/katharos", 'r');
    $katharos = fgets($myfile);
    fclose($myfile);
    $myfile = fopen("$addr/Data/Points/charis", 'r');
    $charis = fgets($myfile);
    fclose($myfile);
    $myfile = fopen("$addr/Data/Points/agape", 'r');
    $agape = fgets($myfile);
    fclose($myfile);
    $cookie_name = "REENT";
    $cookie_value = $makarios + $sozo + $kaleo + $katharos + $charis;
    if ($cookie_value != $_COOKIE["REENT"]) {
    $newcooksit = true;
    }
    setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/");
    if ($newcooksit == true) {
      echo '<br><br><br><div class="alert alert-info"><strong>Look!</strong> Points have changed since your last visit! Check the new values <a href="results.php">here!</a> </div>';
    } else {
      echo '<br><br><br>';
    }
    ?>

<?php
$sid = $_SERVER['SERVER_ADDR'];
$items = ["/SysFiles/img/ico/makarios.ico", "/SysFiles/img/ico/agape.ico", "/SysFiles/img/ico/kaleo.ico", "/SysFiles/img/ico/charis.ico", "/SysFiles/img/ico/sozo.ico", "/SysFiles/img/ico/katharos.ico"];
//echo $items[array_rand($items)];
$ico = $items[array_rand($items)];
 ?>
<head>
  <meta charset="utf-8">
  <?php $favicon = $_COOKIE['houseicn']; ?>
<link rel="icon" href="<?php echo "/SysFiles/img/ico/". $favicon; ?>">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
  <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
  <?php
  if ($_SESSION['darktheme'] == true) {
  ?>
  <link rel="stylesheet" type="text/css" href="SysFiles/sys/darktheme.css">
  <?php
}
?>
</style>
</head>
<?php
if ($_SESSION['darktheme'] == true) {
?>
<font color='white'>
  <?php
}
if ($_SERVER['SETHEME'] == 1) {
  if ($_SERVER['SETHEMED'] !== 1) {
  header("Refresh:0");
}
  $_SERVER['SETHEMED'] == 1;
}
 ?>

<?php
if ($_SESSION['ACCESS'] > 0) {
 ?>
 <nav class="navbar navbar-inverse navbar-fixed-top">
   <div class="container-fluid">
     <div class="navbar-header">
       <a class="navbar-brand" href="index.php">House Points</a>
     </div>
     <ul class="nav navbar-nav">
       <li><a href="http://<?php echo $_SERVER['SERVER_ADDR']; ?>/index.php">Home</a></li>
       <li><a href="http://<?php echo $_SERVER['SERVER_ADDR']; ?>/results.php">Current Results</a></li>
       <li><a href="http://<?php echo $_SERVER['SERVER_ADDR']; ?>/archive.php">Old Results</a></li>
       <li><a href="http://<?php echo $_SERVER['SERVER_ADDR']; ?>/submit.php">Teacher Submission</a></li>
       </ul>
     <ul class="nav navbar-nav navbar-right">
       <li><a href="http://<?php echo $_SERVER['SERVER_ADDR']; ?>/logout.php"><span class="glyphicon glyphicon-log-out" aria-hidden="true"></span> Logout</a></li>
       <li class="dropdown">
   <a class="dropdown-toggle" data-toggle="dropdown" href="#">About
   <span class="caret"></span></a>
   <ul class="dropdown-menu">
 <?php include "sysinfo"; ?>
   </ul>
 </li>
 </ul>
   </div>
 </nav>
 <?php } else { ?>
<nav class="navbar navbar-inverse navbar-fixed-top">
  <div class="container-fluid">
    <div class="navbar-header">
      <a class="navbar-brand" href="index.php">House Points</a>
    </div>
    <ul class="nav navbar-nav">
      <li><a href="http://<?php echo $_SERVER['SERVER_ADDR']; ?>/index.php">Home</a></li>
      <li><a href="http://<?php echo $_SERVER['SERVER_ADDR']; ?>/results.php">Current Results</a></li>
      <li><a href="http://<?php echo $_SERVER['SERVER_ADDR']; ?>/archive.php">Old Results</a></li>
      <li><a href="http://<?php echo $_SERVER['SERVER_ADDR']; ?>/submit.php">Teacher Submission</a></li>
    </ul>
    <ul class="nav navbar-nav navbar-right">
      <li class="dropdown">
  <a class="dropdown-toggle" data-toggle="dropdown" href="#">About
  <span class="caret"></span></a>
  <ul class="dropdown-menu">
<?php include "sysinfo"; ?>
  </ul>
</li>
</ul>
  </div>
</nav>
<?php }  ?>

根据bugs.chromium.org/p/chromium/issues/detail？id=51270有一个错误阻止Chrome不通过网络路径获取收藏夹图标。

尝试完全限定URL，如：

<link rel="shortcut icon" href="<?php echo "http://example.com/SysFiles/img/ico/". $favicon; ?>">

我个人从记事起就没有使用过rel="shortcut icon"。简单使用：

<link rel="icon" href="<?php echo "/SysFiles/img/ico/". $favicon; ?>">

应该做这个把戏。刚刚在Chrome和Firefox中测试并运行（对我来说一直如此）。相对路径也是。不是绝对的。

破坏缓存的方法，如果需要的话：

将文件名更改为favicon2.ico，例如/favicon.ico
在浏览器中输入.ico的直接路径，并多次刷新页面，即打开Chrome/Firefox/whatevery，在地址栏中输入http://example.com/path/to/favicon.ico。点击输入。然后多次按下Ctrl+Shift+R
将查询字符串附加到<link>中的.ico路径，例如<link rel="icon" href="http://example.com/path/to/favicon.ico?foo=bar">

参考：https://en.wikipedia.org/wiki/Favicon