PHP文本操作类

php  /  管理员 发布于 7年前   160

复制代码 代码如下:

<?php  
class CtbClass {   

           var  $file;           
           var  $index;       

       //建立一个文件并写入输入   
           function  null_write($new)   
           {   
                       $f=fopen($this->file,"w");           
                       flock($f,LOCK_EX);   
                       fputs($f,$new);           
                       fclose($f);     
           }   
           //  添加数据记录到文件末端   
           function  add_write($new)  {             
                       $f=fopen($this->file,"a");           
                       flock($f,LOCK_EX);   
                       fputs($f,$new);             
                       fclose($f);     
           }     
           //  配合readfile()的返回一起使用,把一行数据转换为一维数组   
           function  make_array($line)  {   
                       $array  =  explode("\x0E",$line);   
                       return  $array;   
           }   

           //把为一维数组转换一行数据   
           function  join_array($line)  {   
                       $array  =  join("\x0E",$line);   
                       return  $array;   
           }   
           //  返回数据文件的总行数   
           function  getlines()  {   
                       $f=file($this->file);           
                       return  count($f);           
           }   
           //  返回下一行的数据记录(备用)   
           function  next_line()  {   
                       $this->index=$this->index++;           
                       return  $this->get();           
           }   

           //  返回上一行的数据记录(备用)   
           function  prev_line()  {   
                       $this->index=$this->index--;           
                       return  $this->get();           
           }       
           //  返回当前行的数据记录数据较小   
           function  get()  {   
                       $f=fopen($this->file,"r");           
                       flock($f,LOCK_SH);   
                       for($i=0;$i<=$this->index;$i++)  {   
                                   $rec=fgets($f,1024);           
                       }   
                       $line=explode("\x0E",$rec);   
                       fclose($f);   
                       return  $line;           
           }       
           //  返回当前行的数据记录数据较大   
           function  get_big_file()  {   
                       $f=fopen($this->file,"r");           
                       flock($f,LOCK_SH);   
                       for($i=0;$i<=$this->index;$i++)  {   
                                   $rec=fgets($f,1024*5);           
                       }   
                       $line=explode("\x0E",$rec);   
                       fclose($f);   
                       return  $line;           
           }       
           //  打开数据文件---以一维数组返回文件内容   
           function  read_file()  {   
                       if  (file_exists($this->file))  {   
                                   $line  =file($this->file);   
                       }   
                       return  $line;   
           }   
           //  打开数据文件---以二维数组返回文件内容   
           function  openFile()  {   
                       if  (file_exists($this->file))  {   
                                   $f  =file($this->file);   
                                   $lines  =  array();   
                                   foreach  ($f  as  $rawline)  {   
                                               $tmpline  =  explode("\x0E",$rawline);   
                                               array_push($lines,  $tmpline);   
                                   }   
                       }   
                       return  $lines;   
           }   
           //  传入一个数组,合并成一行数据,重写整个文件   
           function  overwrite($array){   
                       $newline  =  implode("\x0E",$array);               
                       $f  =  fopen($this->file,"w");   
                       flock($f,LOCK_EX);   
                       fputs($f,$newline);   
                       fclose($f);   
           }   

           //  添加一行数据记录到文件末端   
           function  add_line($array,$check_n=1)  {       
                       $s=implode("\x0E",$array);           
                       $f=fopen($this->file,"a");           
                       flock($f,LOCK_EX);   
                       fputs($f,$s);           
                       if  ($check_n==1)  fputs($f,"\n");           
                       fclose($f);     
           }           

           //  插入一行数据记录到文件最前面   
           function  insert_line($array)  {   
                       $newfile  =  implode("\x0E",$array);   
                       $f  =  fopen($this->file,"r");   
                       flock($f,LOCK_SH);   
                       while  ($line  =  fgets($f,1024))  {   
                                   $newfile  .=  $line;   
                       }   
                       fclose($f);   
                       $f  =  fopen($this->file,"w");   
                       flock($f,LOCK_EX);   
                       fputs($f,$newfile);   
                       fclose($f);   
           }   

           //  更新所有符合条件的数据记录,适用于每行字节数据较大的情况   
           function  update($column,$query_string,$update_array)  {   
                       $update_string  =  implode("\x0E",$update_array);         
                       $newfile  =  "";               
                       $fc=file($this->file);   
                       $f=fopen($this->file,"r");   
                       flock($f,LOCK_SH);   
                       for  ($i=0;$i<count($fc);$i++)  {   
                                   $list  =  explode("\x0E",$fc[$i]);   
                                   if  ($list[$column]  !=  $query_string)  {   
                                               $newfile  =  $newfile.chop($fc[$i])."\n";   
                                   }  else  {   
                                               $newfile  =  $newfile.$update_string;   
                                   }   
                       }   
                       fclose($f);   
                       $f=fopen($this->file,"w");   
                       flock($f,LOCK_EX);   
                       fputs($f,$newfile);   
                       fclose($f);   
           }   

           //  更新所有符合条件的数据记录,适用于每行字节数据较小的情况   
           function  update2($column,$query_string,$update_array)  {   
                       $newline  =  implode("\x0E",$update_array);         
                       $newfile  =  "";   
                       $f  =  fopen($this->file,"r");   
                       flock($f,LOCK_SH);   
                       while  ($line  =  fgets($f,1024))  {   
                                   $tmpLine  =  explode("\x0E",$line);   
                                   if  ($tmpLine[$column]  ==  $query_string)  {   
                                               $newfile  .=  $newline;   
                                   }  else  {   
                                               $newfile  .=  $line;   
                                   }   
                       }   
                       fclose($f);   
                       $f  =  fopen($this->file,"w");   
                       flock($f,LOCK_EX);   
                       fputs($f,$newfile);   
                       fclose($f);   
           }   

           //  删除所有符合条件的数据记录,适用于每行字节数据较大的情况   
           function  delete($column,$query_string)  {   
                       $newfile  =  "";               
                       $fc=file($this->file);   
                       $f=fopen($this->file,"r");   
                       flock($f,LOCK_SH);   
                       for  ($i=0;$i<count($fc);$i++)  {   
                                   $list  =  explode("\x0E",$fc[$i]);   
                                   if  ($list[$column]  !=  $query_string)  {   
                                               $newfile  =  $newfile.chop($fc[$i])."\n";   
                                   }   
                       }   
                       fclose($f);   
                       $f=fopen($this->file,"w");   
                       flock($f,LOCK_EX);