我写了(也感谢 Stackoverflow 的帮助)一个 PHP 脚本(称为 wunder_temp.php),它显示了给定数量 Weatherunderground.com 站的温度和位置。
我在页脚中包含了这个脚本,它运行良好,但在一个页面上。如果我打开http://www.flapane.com/guestbook/guestbook.php温度将不会显示在我的页脚中,并且 error.log 说:[09-Sep-2012 09:46:45 UTC] PHP Fatal错误:第 47 行 /home/xxx/public_html/wunder_temp.php 中的字符串不支持 [] 运算符
$display = file($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 是我网站上 wunder_temp.php 不起作用的唯一页面。
上面的代码所做的是读取缓存文件并将偶数行放入 $temperature[] 数组中,将奇数行放入 $location[] 数组中。这是我的缓存文件中的一个示例:
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簿页面上看到这些错误。
事实证明,“罪魁祸首”是函数 loadmore.php,它使用 twitter 风格的 ajax 函数加载留言簿评论(并且包含在 guestbook.php 中)。如果我不包含它,wunder_temp.php 运行良好,并且不会产生任何错误。
加载更多.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-style load-more-comments 函数:
$(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
{
$(".morebox").html('Nessun altro commento / No more comments');
}
return false;
});
});
ajax_more.php(上述脚本需要):
<?
include "connect.php";
if(isSet($_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
}
?>
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