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[导入]php操作php文件

Jun 23, 2016 pm 02:29 PM

听起来有些晕吧?!!使用php来操作php页面。有一个小的用途,在一个系统当中可能会有个别的小项不便存入数据库,但是我们又要经常在其他页面当中调用,而且还需要更新,那么我们就可以用这种方式来解决。其中遇到几个小问题,搞了俺半天时间才搞定(小生驽钝!  )

   比如说:用户需要更改某一个标题,但是单独为这个标题在建立一个表,显然不太合适。所以就想到,把这个变量写入php文件当中,供其它页面调用。name.php文件,需要的内容如下:

$name="标题";

?>

    "标题"这两个字需要用户可以更新。那么我们如何来实现:

     一个简单的提交信息页面add_name.php



     一个接收用户提交信息并进行处理的页面addname.php

 
$name=$_POST['name'];             //接收从add_name.php传过来的name值
if(empty($name)){                 //判断是否为空
?>


}else{  
 $filename="name.php";           //定义操作文件
 $delline=2;                     //要删除的行数  
 if(!file_exists($filename)){    //判断文件是否存在
   die("指定文件未发现!操作中断!");
 }
 $farray=file($filename);        //读取文件数据到数组中
 for($tmpa=0;$tmpa    if(($tmpa+1)==2){            //判断行数
    $farray[$tmpa]="\$name2="."\"".$name."\";\n";      *
                                 //替换原有行的数据
    }                            //重新整理后的数据
  $newfp.=$farray[$tmpa]; 
}
$fp=@fopen($filename,"w") or die("写方式打开文件 $filename 失败");

                                //我们以写的方式打开文件

@fwrite($fp,$newfp) or die("文件写入失败");

@fclose($fp);                   关闭文件
}
?>

    这段代码只是做测试用 117-202 1Z0-043 1z0-042  。写的不规范的地方倒是贻笑大方了!    

    这样我们就可以用来更新name.php文件当中的变量。当然这是一种比较笨的方法(谁让俺也是笨人)。这种需求还有很多种实现方式。

    其中*标记的一行当中,我们用到转义字符,这个说起来很简单,但是我测试的时候由于方法不得当倒是浪费了不少时间。现在把转义字符表贴在下面:

转义字符 序列含义
  \n      换行(LF 或 ASCII 字符 0x0A(10))
  \r      回车(CR 或 ASCII 字符 0x0D(13))
  \t      水平制表符(HT 或 ASCII 字符 0x09(9))
  \\      反斜线
  \$      美元符号
  \"      双引号

\[0-7]{1,3} 此正则表达式序列匹配一个用八进制符号表示的字符
\x[0-9A-Fa-f]{1,2} 此正则表达式序列匹配一个用十六进制符号表示的字符


单就处理字符串而言,使用单引号要比使用双引号速度要快,所以你要在你的程序中选择适当的引号。




loveairnike 2008-01-03 11:22 发表评论


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