为什么我会收到错误消息：“ SyntaxError：意外令牌<”？

Question

This is the code i'm using: 这是我正在使用的代码：

<?php 
$pattern="(\.jpg$)|(\.png$)|(\.jpeg$)|(\.gif$) |(\.Gif$)"; //valid image extensions 
$files = array(); 
$curimage=0; 
if($handle = opendir($"http://newsxpressmedia.com/files/radar-simulation-files")) { 
    while(false !== ($file = readdir($handle))){ 
        if(eregi($pattern, $file)){ //if this file is a valid image 
            //Output it as a JavaScript array element 
            $files[] = $file; 
            $curimage++; 
        } 
    } 
    closedir($handle); 
} 
?> 

<!DOCTYPE html>

<html>
   <head>
      <title>change picture</title>

      <link rel="stylesheet" type="text/css" href="/css/result-light.css">

  <style type='text/css'>
    #Timer_Countdown{
    background:black;
    color:yellow;
    font-weight:bold;
    text-align:center;
}
  </style>

      <script type = "text/javascript">

          function displayNextImage() {
              x = (x === images.length - 1) ? 0 : x + 1;
              document.getElementById("img").src = images[x];
          }

          function displayPreviousImage() {
              x = (x <= 0) ? images.length - 1 : x - 1;
              document.getElementById("img").src = images[x];
          }

var images = <?=json_encode($files)?>;
//var images = [];
var x = -1; 
var swap_hours = 0;
var swap_minutes = 0;
var swap_seconds = 5;

var down_counter_hours;
var down_counter_minutes;
var down_counter_seconds;

function initTimer() {

    down_counter_hours = swap_hours;
    down_counter_minutes = swap_minutes;
    down_counter_seconds = swap_seconds;
    counter = setInterval(switcher, 1000);
}

function restartCounter() {
        down_counter_hours = swap_hours;
        down_counter_minutes = swap_minutes;
        down_counter_seconds = swap_seconds;
}

function switcher() {
    down_counter_seconds--;
    if (down_counter_hours <= 0 && down_counter_minutes <= 0 && down_counter_seconds <= 0) {
        swapColor();
        restartCounter();
    }
    if (down_counter_seconds <= 0 && down_counter_minutes > 0) {
        down_counter_seconds = 60;
        down_counter_minutes--;
    }
    if (down_counter_minutes <= 0 && down_counter_hours > 0) {
        down_counter_minutes = 60;
        down_counter_hours--;
    }

    document.getElementById("Timer_Countdown").innerText =        down_counter_hours+":"+down_counter_minutes+":"+down_counter_seconds;
}

function swapColor() {
    displayNextImage();
}

      </script>
      <div id="div_hours" class="div_box"></div>
      <div id="div_minutes" class="div_box"></div>
      <div id="div_seconds" class="div_box"></div>
      <div id="div_switcher" class="div_box"></div>
   </head>

   <body onload = "initTimer()">
       <div id="Timer_Countdown">&nbsp;</div>
       <img id="img" src="http://newsxpressmedia.com/files/theme/radar000005.Gif">
       <button onclick="displayPreviousImage(); restartCounter()">Previous</button>
       <button onclick="displayNextImage(); restartCounter()">Next</button>
   </body>
</html>

The error is on the line: 错误就在网上：

var images = <?=json_encode($files)?>;

If i change this line to this line: 如果我将此行更改为此行：

var images = [];

Then the code is working fine but without using the php files variable. 然后，代码可以正常工作，但不使用php files变量。 Something is wrong with the line: var images = <?=json_encode($files)?>; 该行有问题： var images = <?=json_encode($files)?>;

I tried to change this line to: echo json_encode($images); 我试图将此行更改为： echo json_encode($images); or to var images = echo json_encode($files); 或var images = echo json_encode($files); but same error. 但同样的错误。

I'm using weebly to build my site and my site server is on ipage.com 我正在使用weebly来构建网站，并且我的网站服务器在ipage.com上

How can i fix the error ? 我该如何解决错误？

Answer 1

It looks like you don't have short tags enabled(and are using a pre 5.4 php version), thus the line <?=json_encode($files)?> is not parsed by php and is just send straight through. 似乎您没有启用短标签（并且正在使用5.4之前的PHP版本），因此php无法解析<?=json_encode($files)?> ，而是直接发送。 var images = <... is not a valid javascript expression. var images = <...不是有效的JavaScript表达式。 Here's some information about php's short_open_tag parameter: http://php.net/manual/en/ini.core.php#ini.short-open-tag 以下是有关php的short_open_tag参数的一些信息： http : //php.net/manual/zh/ini.core.php#ini.short-open-tag

Answer 2

A couple of changes. 进行了一些更改。 Change 更改

$pattern ="(\.jpg$)|(\.png$)|(\.jpeg$)|(\.gif$) |(\.Gif$)";

to 至

$pattern = '/\.(png|jpg|jpeg|gif)$/i';

and 和

eregi($pattern, $file)

to 至

preg_match($pattern, $file)

and see what happens. 看看会发生什么。 eregi deprecated as PHP 5.3.0. eregi不推荐使用PHP 5.3.0。

Answer 3

You are using '=' inside the PHP tags. 您在PHP标记内使用'='。 Try this: 尝试这个：

var images = <?json_encode($files)?>;

为什么我会收到错误消息：“ SyntaxError：意外令牌<”？

问题描述

3 个解决方案

解决方案1
0 2014-10-29 23:56:21

解决方案2
0 2014-10-30 00:02:09

解决方案3
-2 2014-10-29 23:58:26

为什么我会收到错误消息：“ SyntaxError：意外令牌&lt;”？

问题描述

3 个解决方案

解决方案1 0 2014-10-29 23:56:21

解决方案2 0 2014-10-30 00:02:09

解决方案3 -2 2014-10-29 23:58:26

为什么我会收到错误消息：“ SyntaxError：意外令牌<”？

解决方案1
0 2014-10-29 23:56:21

解决方案2
0 2014-10-30 00:02:09

解决方案3
-2 2014-10-29 23:58:26