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  #1   IP: 180.125.4.254
Old 2014-12-07, 05:01 AM
Allardt Allardt is offline
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Default php批量替换内容或指定目录下所有文件内容

要替换字符串中的内容我们只要利用php相关函数,如strstr,str_replace,正则表达式了,那么我们要替换目录所有文件的内容就需要先遍历目录再打开文件再利用上面讲的函数替换了。 先我们看最基本:

strtr() 函数转换字符串中特定的字符。

语法
strtr(string,from,to)或者

strtr(string,array)

Code:
$addr=strtr($addr,"","aao");        //第一种调用方法
$trans=array("hello"=>"hi","hi"=>"hello");      //定义一个转换数组
echo strtr("hi all, i said hello",$trans);       //第二种调用方法


//普通字符串

echo strtr("hilla warld","ia","eo");

//数组

$arr = array("hello" => "hi", "world" => "earth");
 echo strtr("hello world",$arr);
/*
如果 from 和 to 的长度不同,则格式化为最短的长度。

再看一个简单的函数

// +------ 我以前写的一个替换函数

Code:
function file_modify($search_contents, $replace_contents, $filename)
 {
         $fp = file_get_contents($filename);
         $new_fp = str_replace($search_contents, $replace_contents, $fp);
         file_put_contents($filename, $new_fp);
 }

// +------ 用法
file_modify('sdf hjhj', 'sdf_test hjhj_test', 'test10.html');
// 或者直接用这个
Code:
preg_replace('|(<div class="body">)(^<]+)(</div>)|iSU', "${1}" . 替换后的内容 . "$3", $str);

 

preg_replace('|(<div class="body">)(^<]+)(</div>)|iSU', "${1}" . 替换后的内容 . "$3", $str);
上面我所说的所有问题都只会替换一个文件里面的,那么我想替换一个站点所有目录里面文件指定字符,那么我们来看下面这个函数
Code:
<?php     
 if (isset($_GET['dir'])){ //设置文件目录     
     $basedir=$_GET['dir'];     
 }else{     
     $basedir = '.';     
 }   
 $auto = 1;     
 checkdir($basedir);     
 function checkdir($basedir){     
     if ($dh = opendir($basedir)) {     
         while (($file = readdir($dh)) !== false) {     
             if ($file != '.' && $file != '..'){     
                 if (!is_dir($basedir."/".$file)) {     
                     echo "filename: $basedir/$file ".checkBOM("$basedir/$file")." <br>";     
                 }else{     
                     $dirname = $basedir."/".$file;     
                     checkdir($dirname);     
                 }     
             }     
         }     
         closedir($dh);     
     }     
 }     
 function checkBOM ($filename) {     
     global $auto;     
     $contents = file_get_contents($filename);     
     $charset[1] = substr($contents, 0, 1);     
     $charset[2] = substr($contents, 1, 1);     
     $charset[3] = substr($contents, 2, 1);     
     if (ord($charset[1]) == 239 && ord($charset[2]) == 187 && ord($charset[3]) == 191) {     
         if ($auto == 1) {     
             $rest = substr($contents, 3);     
             rewrite ($filename, $rest);     
             return ("<font color=red>BOM found, automatically removed._<a href=http://www.111cn.net>http://www.111cn.net/nokia/c6/</a></font>");     
         } else {     
             return ("<font color=red>BOM found.</font>");     
         }     
     }     
     else return ("BOM Not Found.");     
 }     
 function rewrite ($filename, $data) {     
     $filenum = fopen($filename, "w");     
     flock($filenum, LOCK_EX);     
     fwrite($filenum, $data);     
     fclose($filenum);     
 }     
 ?>
这样我们只要运行就可以替换指定目录所所有文件的所有内容,这个还是特别方便的。

还有,如要求一个一个的来替换字符,要用strtr()函数。

例子 1

Code:
<?php
echo strtr("Hilla Warld","ia","eo");
?>
输出:
Hello World

高级一点,替换一个文字中指定的字符:
Code:
function file_modify($search_contents, $replace_contents, $filename)
 {
         $fp = file_get_contents($filename);
         $new_fp = strtr($fp,$search_contents, $replace_contents);
         file_put_contents($filename, $new_fp);
 }

// +------ 用法
file_modify('123456aouie', 'aouie123456', 'aa.html');
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