字符串不支持[]运算符.只需一页就可以了 [英] [] operator not supported for strings. It happens JUST in one page
问题描述
我还写了一个PHP脚本(称为wunder_temp.php)(也感谢Stackoverflow的帮助)，该脚本显示了给定数量的Weatherunderground.com站的温度和位置.
I wrote (thanks to Stackoverflow help, too) a PHP script (called wunder_temp.php) which shows the temperature and location for a given number of Weatherunderground.com Stations.
我将此脚本包含在页脚中，但在单个页面上运行良好.如果我打开 http://www.flapane.com/guestbook/guestbook.php 温度不会在我的页脚中显示，并且error.log说:[09-Sep-2012 09:46:45 UTC] PHP致命错误:[]第47行的/home/xxx/public_html/wunder_temp.php中的字符串不支持[]运算符
I included this script in my footer, and it works well BUT on a single page. If I open http://www.flapane.com/guestbook/guestbook.php the temperatures won't be shown in my footer, and error.log says: [09-Sep-2012 09:46:45 UTC] PHP Fatal error: [] operator not supported for strings in /home/xxx/public_html/wunder_temp.php on line 47
$display = file($cachename, FILE_IGNORE_NEW_LINES); //ignore \n for non-reporting stations
foreach ($display as $key=>$value){
if($key % 2 == 0){
$temperature[] = $value; // EVEN (righe del file cache pari)
}else{
$location[] = $value; // ODD - **HERE IS LINE 47**
}
}
奇怪的是，guestbook.php是我网站的唯一页面，其中wunder_temp.php无法正常工作.
The weird thing is that guestbook.php is the ONLY page of my website where wunder_temp.php doesn't work.
上面的代码所做的是读取缓存文件，并将偶数行放在$ temperature []数组中，并将奇数行放在$ location []数组中.这是我的缓存文件中的一个示例:
What the above code does is reading the cachefile and put in a $temperature[] array the even lines and in $location[] array the odd lines. Here's a sample from my cachefile:
26.8
Stadio San Paolo di Napoli, Napoli
24.4
Pozzuoli
老实说，我不知道为什么我只在我的留言页上看到这些错误.
Honestly I don't know why I see that errors just on my guestbook page.
事实证明，罪魁祸首"是函数loadmore.php，它使用Twitter风格的ajax函数加载留言簿注释(包括在guestbook.php中).如果我不包含它，则wunder_temp.php效果很好，并且不会产生任何错误.
It turns out that the "culprit" is the function loadmore.php which loads the guestbook comments (and which is included in guestbook.php) using a twitter-style ajax function. If I don't include it, wunder_temp.php works well, and it doesn't produce any error.
loadmore.php:
loadmore.php:
<div id='contcomment'>
<div class="timeline" id="updates">
<?php
$sql=mysql_query("select * from gbook_comments ORDER BY id DESC LIMIT 9");
while($row=mysql_fetch_array($sql))
{
$msg_id=$row['id'];
$name=$row['name'];
$url=$row['url'];
$email=$row['email'];
$location=$row['location'];
$date= strtotime($row['dt']); //unix timestamp
$country_code=$row['country_code'];
$message=$row['body'];
$link_open = '';
$link_close = '';
if($url){
// If the person has entered a URL when adding a comment,
// define opening and closing hyperlink tags
$link_open = '<a href="'.$url.'" target="_blank" rel="nofollow">';
$link_close = '</a>';
}
// Needed for the default gravatar image:
$url_grav = 'http://'.dirname($_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]).'/img/default_avatar.gif';
// Show flags
$image = strtolower($country_code) . ".png";
if (file_exists("./img/flags/" . $image)){
$show_image = true;
$image_link = "<img src='/guestbook/img/flags/$image' alt='user flag' />";
}else{
$show_image = false;
}
echo '<div class="comment">
<div class="avatar">
'.$link_open.'
<img src="http://www.gravatar.com/avatar/'.md5($email).'?size=50&default='.urlencode($url_grav).'" alt="gravatar icon" />
'.$link_close.'
</div>
<div class="name">'.$link_open.$name.$link_close.' </div><div class="location"><i>(da/from '.$location.' '.$image_link.' )</i></div>
<div class="date" title="Added at '.date('H:i \o\n d M Y',$date).'">'.date('d M Y',$date).'</div>
<p>'.$message.'</p>
</div>' ;
} ?>
</div>
<div id="more<?php echo $msg_id; ?>" class="morebox">
<a href="#" class="more" id="<?php echo $msg_id; ?>">Carica Commenti più vecchi / Load older entries</a>
</div>
</div>
ajax_more.js AJAX Twitter样式的加载更多注释功能:
ajax_more.js AJAX twitter-style load-more-comments function:
$(function() {
//More Button
$('.more').live("click",function()
{
var ID = $(this).attr("id");
if(ID)
{
$("#more"+ID).html('<img src="moreajax.gif" />');
$.ajax({
type: "POST",
url: "ajax_more.php",
data: "lastmsg="+ ID,
cache: false,
success: function(html){
$("div#updates").append(html);
$("#more"+ID).remove();
}
});
}
else
{
$(".morebox").html('Nessun altro commento / No more comments');
}
return false;
});
});
ajax_more.php(上述脚本需要):
ajax_more.php (needed by the above script):
<?
include "connect.php";
if(isSet($_POST['lastmsg']))
{
$lastmsg=$_POST['lastmsg'];
$lastmsg=mysql_real_escape_string($lastmsg);
$result=mysql_query("select * from gbook_comments where id<'$lastmsg' order by id desc limit 9");
$count=mysql_num_rows($result);
while($row=mysql_fetch_array($result))
{
$msg_id=$row['id'];
$name=$row['name'];
$url=$row['url'];
$email=$row['email'];
$location=$row['location'];
$date= strtotime($row['dt']); //unix timestamp
$country_code=$row['country_code'];
$message=$row['body'];
$link_open = '';
$link_close = '';
if($url){
// If the person has entered a URL when adding a comment,
// define opening and closing hyperlink tags
$link_open = '<a href="'.$url.'" target="_blank" rel="nofollow">';
$link_close = '</a>';
}
// Needed for the default gravatar image:
$url_grav = 'http://'.dirname($_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]).'/img/default_avatar.gif';
// Show flags
$image = strtolower($country_code) . ".png";
if (file_exists("./img/flags/" . $image)){
$show_image = true;
$image_link = "<img src='/guestbook/img/flags/$image' alt='user flag' />";
}else{
$show_image = false;
}
echo '<div class="comment">
<div class="avatar">
'.$link_open.'
<img src="http://www.gravatar.com/avatar/'.md5($email).'?size=50&default='.urlencode($url_grav).'" alt="gravatar icon" />
'.$link_close.'
</div>
<div class="name">'.$link_open.$name.$link_close.' </div><div class="location"><i>(da/from '.$location.' '.$image_link.' )</i></div>
<div class="date" title="Added at '.date('H:i \o\n d M Y',$date).'">'.date('d M Y',$date).'</div>
<p>'.$message.'</p>
</div>' ;
}
?>
<div id="more<?php echo $msg_id; ?>" class="morebox">
<a href="#" id="<?php echo $msg_id; ?>" class="more">Carica Commenti più vecchi / Load older entries</a>
</div>
<?php
}
?>
感谢您的帮助
推荐答案
$ location 已经是该页面上的字符串.这就是为什么在使用变量之前正确初始化变量的原因:
$location is already a string on that page. This is why you properly initialize variables before you use them:
$temperature = $location = array();
foreach ($display as $key => $value){
if ($key % 2 == 0){
$temperature[] = $value;
} else {
$location[] = $value;
}
}
更好的是，更好地分离变量范围，这样就不会出现名称冲突.将函数和类与它们的私有变量范围一起使用，不要将所有内容都放在全局范围内.
Even better, separate your variable scopes better so you don't get a name clash like that. Use functions and classes with their private variable scopes and don't put everything in the global scope.
这篇关于字符串不支持[]运算符.只需一页就可以了的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
