用文本文件制作留言板提示(上)_php基础
首先是保证文本文件可读写,在文件准备写入之前,我们所要做的是处理好用户留言!
这项工作可以在提交表格前进行,我们将得到的数据各项用特定的符号分开,比如说用&号,值得说明的是如果提交的数据中如果也包含有特定字符,那我们只好将他转化成其他形式,这一点各位自有办法;
如是我们得到数据形如:
$str=”aaaaa&bbbbb&ccccc&ddddd”;
在将数据写入文件前我们加上
$str=$str.”
\n”
然后执行:
$fp=fopen("txt/mytxt.txt","a");
fwrite($fp,$txt);
fclose($fp);
这样我们写入的数据位于文件末尾部分
如何让最新的留言出现在留言板的首位?
数据有了以上的处理,就好办了,
$date=file(“txt/mytxt.txt”);
$n=count($date);
for ($I=$n;$I>0;$I--){
$str=explode(“&”,$date[$I])
.
//将得到的$str数组各项输出.
.
}
这样最新插入的留言就保持在首位。

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