如何将PHP的结果输出到非PHP页面中
页面
这个问题是当我自已实现了统计计数之后,我想将它的输出用在我的不支持PHP功能的页面中,那么应该如何做呢?主要的解决办法是输出一段javascript脚本即可。这个是很有用的,比如实现动态新闻, 广告轮询,当然这里是讲如何把某个程序的下载计数输出到非PHP页面中去。
文件格式为:
索引|文件名提示|链接|计数
注意,这里用"|"线分隔。我采用的是文本文件进行处理。里面可能某一行数据为:
file1|测试文件1|../download/file1.zip|10
可以看到,下载次数可能已经是10次了。现在我就想把这个10次输出到其它的页面中。
第一步:写Javascript脚本
很简单:
是不是!src后面是指输出的脚本程序,"?"后面是传入脚本的参数。那么output.php应该输出什么数据才能被执行呢?应该输出javascript语句,如document.write()之类的语句。这样,浏览器就会把output.php的输出结果看成一段javascript程序再进行处理,就好象直接写的脚本一样,只不过这段脚本是从别的地方得到的。
好了,知道应该输出什么样的内容了,就可以写php程序了。
第二步:输出结果
$fp=fopen("../count/download.db", "r");
$flag=FALSE;
while(!feof($fp))
{
$line=fgets($fp, 256);
list($index, $title, $url, $count)=split("\|", $line);
if (strtolower($index)==strtolower($id))
{
$flag=TRUE;
break;
}
}
fclose($fp);
if ($flag)
{
echo "document.write($count);";
}
else
echo "document.write(\"not found\");";
?>
这段代码也很简单,但是有几点要说明。先打开一个文件。$flag表示是否找到指定索引的文件记录,
首先置为FALSE。再是一个循环,条件是文件没有结束。
然后是循环体:取出一行文本,长度最好长点。进行字段分割,以"|"为分割符。注意,使用的split函数是正则表达式,"|"是一个特殊符号用以用"\"号。然后分别放入相应的变量中。在这里我们真正关心的是$index和$count。比较输入的参数$id与取出的索引($index)是否相等,如果相等,则将找到标志设为TRUE,退出循环。否则查找下一行数据。
结束时,关闭文件,根据是否找到标志输出相应的javascript脚本即可。
对于$id的使用,是PHP自动将调用的URL处?id=xxx进行了处理,可以直接使用。也可以使用$HTTP_GET_VARS[id]。

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