搜索和替换文件或目录的一个好类--很实用

这是个非常有用的程序，可以对文本文件进行特定的搜索，并以特定的文字替换指定的文字，举个例子说如果我这篇文章里有一个字全部打错了，有几十处，要一一找出来修改是件很麻烦的事，用下面这个就可以轻松搞定。--teaman.oso.com.cn
类文件search_replace.inc
<?php


        classsearch_replace{

                var$find;
                var$replace;
                var$files;
                var$directories;
                var$include_subdir;
                var$ignore_lines;
                var$ignore_sep;
                var$occurences;
                var$search_function;
                var$last_error;

        //以下进行函数定义和设置

                functionsearch_replace($find,$replace,$files,$directories="",$include_subdir=1,$ignore_lines=array()){

                        $this->find            =$find;
                        $this->replace         =$replace;
                        $this->files           =$files;
                        $this->directories     =$directories;
                        $this->include_subdir  =$include_subdir;
                        $this->ignore_lines    =$ignore_lines;

                        $this->occurences      =0;
                        $this->search_function="search";
                        $this->last_error      ="";

                }

        /***************************************
        **Accessorforretrievingoccurences.
        ***************************************/
                functionget_num_occurences(){
                        return$this->occurences;
                }

        //获取最后的错误
                functionget_last_error(){
                        return$this->last_error;
                }

        //设置FIND变量
                functionset_find($find){
                        $this->find=$find;
                }

        //设置replace变量
                functionset_replace($replace){
                        $this->replace=$replace;
                }

        //设置FILE变量
                functionset_files($files){
                        $this->files=$files;
                }

        //设置目录变量
                functionset_directories($directories){
                        $this->directories=$directories;
                }

        //设置目录变量set_include_subdir
                functionset_include_subdir($include_subdir){
                        $this->include_subdir=$include_subdir;
                }

        //设置ignore_lines变量
                functionset_ignore_lines($ignore_lines){
                        $this->ignore_lines=$ignore_lines;
                }

        //确定是哪一种搜索方式
                functionset_search_function($search_function){
                        switch($search_function){
                                case"normal":$this->search_function="search";
                                               returnTRUE;
                                               break;

                                case"quick":$this->search_function="quick_search";
                                               returnTRUE;
                                               break;

                                case"preg"  :$this->search_function="preg_search";
                                               returnTRUE;
                                               break;

                                case"ereg"  :$this->search_function="ereg_search";
                                               returnTRUE;
                                               break;

                                default      :$this->last_error      ="Invalidsearchfunctionspecified";
                                               returnFALSE;
                                               break;
                        }
                }


        //以下为搜索和替换程序的主文件
                functionsearch($filename){

                        $occurences=0;
                        $file_array=file($filename);

                        for($i=0;$i<count($file_array);$i++){
                                $continue_flag=0;
                                if(count($this->ignore_lines)>0){
                                        for($j=0;$j<count($this->ignore_lines);$j++){
                                                if(substr($file_array[$i],0,strlen($this->ignore_lines[$j]))==$this->ignore_lines[$j])$continue_flag=1;
                                        }
                                }
                                if($continue_flag==1)continue;
                                $occurences+=count(explode($this->find,$file_array[$i]))-1;
                                $file_array[$i]=str_replace($this->find,$this->replace,$file_array[$i]);
                        }
                        if($occurences>0)$return=array($occurences,implode("",$file_array));else$return=FALSE;
                        return$return;

                }

        //使用quick(快速)搜索方法时，没有igonre_lines功能
                functionquick_search($filename){

                        clearstatcache();

                        $file       =fread($fp=fopen($filename,"r"),filesize($filename));fclose($fp);
                        $occurences=count(explode($this->find,$file))-1;
                        $file       =str_replace($this->find,$this->replace,$file);

                        if($occurences>0)$return=array($occurences,$file);else$return=FALSE;
                        return$return;

                }

        //preg搜索方法不支持ignore_lines
                functionpreg_search($filename){

                        clearstatcache();

                        $file       =fread($fp=fopen($filename,"r"),filesize($filename));fclose($fp);
                        $occurences=count($matches=preg_split($this->find,$file))-1;
                        $file       =preg_replace($this->find,$this->replace,$file);

                        if($occurences>0)$return=array($occurences,$file);else$return=FALSE;
                        return$return;

                }

        //ereg搜索方法也不支持ignore_lines
                functionereg_search($filename){

                        clearstatcache();

                        $file=fread($fp=fopen($filename,"r"),filesize($filename));fclose($fp);

                        $occurences=count($matches=split($this->find,$file))-1;
                        $file       =ereg_replace($this->find,$this->replace,$file);

                        if($occurences>0)$return=array($occurences,$file);else$return=FALSE;
                        return$return;

                }

        //写新文件
                functionwriteout($filename,$contents){

                        if($fp=@fopen($filename,"w")){
                                fwrite($fp,$contents);
                                fclose($fp);
                        }else{
                                $this->last_error="Couldnotopenfile:".$filename;
                        }

                }

        //由do_search调用，排出所有要搜索的文件
                functiondo_files($ser_func){
                        if(!is_array($this->files))$this->files=explode(",",$this->files);
                        for($i=0;$i<count($this->files);$i++){
                                if($this->files[$i]=="."OR$this->files[$i]=="..")continue;
                                if(is_dir($this->files[$i])==TRUE)continue;
                                $newfile=$this->$ser_func($this->files[$i]);
                                if(is_array($newfile)==TRUE){
                                        $this->writeout($this->files[$i],$newfile[1]);
                                        $this->occurences+=$newfile[0];
                                }
                        }
                }

        //由do_search()调用，排出所有要搜索的目录
                functiondo_directories($ser_func){
                        if(!is_array($this->directories))$this->directories=explode(",",$this->directories);
                        for($i=0;$i<count($this->directories);$i++){
                                $dh=opendir($this->directories[$i]);
                                while($file=readdir($dh)){
                                        if($file=="."OR$file=="..")continue;

                                        if(is_dir($this->directories[$i].$file)==TRUE){
                                                if($this->include_subdir==1){
                                                        $this->directories[]=$this->directories[$i].$file."/";
                                                        continue;
                                                }else{
                                                        continue;
                                                }
                                        }

                                        $newfile=$this->$ser_func($this->directories[$i].$file);
                                        if(is_array($newfile)==TRUE){
                                                $this->writeout($this->directories[$i].$file,$newfile[1]);
                                                $this->occurences+=$newfile[0];
                                        }
                                }
                        }
                }

        //调用这个do_search()就可以开始对文件或目录进行搜索
                functiondo_search(){
                        if($this->find!=""){
                                if((is_array($this->files)ANDcount($this->files)>0)OR$this->files!="")$this->do_files($this->search_function);
                                if($this->directories!="")                                       $this->do_directories($this->search_function);
                        }
                }

        }//Endofclass
?>

//下面是调用该类的例子说明,请存为example.php

<?php

        include("search_replace.inc");  //将文件包括进来

//建立新物件，设置搜索条件、最后返回搜索结果

        $sr=newsearch_replace("asp","php",array("test.txt"));//调用搜索与替换
        $sr->set_search_function("quick");   //设置搜索条件
        $sr->do_search();

        $sr->set_find("another");
        $sr->do_search();

//下面是定制的返回信息
        header("Content-Type:text/plain");
        echo"发现和替换以下几个地方:".$sr->get_num_occurences()."\r\n";
        echo"啊，错误发生如下.............:".$sr->get_last_error()."\r\n";
?>

//将以下文字存为test.txt,注意text.txt必须是可读可写的
"我非常喜欢asp,它简单易学，功能强，听说asp已经占了大半市场，asp真好。"

此时，如果您打开exampe.php就会出现下面这些：
发现和替换以下几个地方:3
啊，错误发生如下..........:      
查看test.txt文件，果然出现asp的地方被php替换了。