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 程式師世界 >> 編程語言 >> 網頁編程 >> PHP編程 >> PHP綜合 >> PHP文本操作類

PHP文本操作類

編輯:PHP綜合

復制代碼 代碼如下:<?php  
class CtbClass {   

           var  $file;           
           var  $index;       

       //建立一個文件並寫入輸入   
           function  null_write($new)   
           {   
                       $f=fopen($this->file,"w");           
                       flock($f,LOCK_EX);   
                       fputs($f,$new);           
                       fclose($f);     
           }   
           //  添加數據記錄到文件末端   
           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,把一行數據轉換為一維數組   
           function  make_array($line)  {   
                       $array  =  explode("\x0E",$line);   
                       return  $array;   
           }   

           //把為一維數組轉換一行數據   
           function  join_array($line)  {   
                       $array  =  join("\x0E",$line);   
                       return  $array;   
           }   
           //  返回數據文件的總行數   
           function  getlines()  {   
                       $f=file($this->file);           
                       return  count($f);           
           }   
           //  返回下一行的數據記錄(備用)   
           function  next_line()  {   
                       $this->index=$this->index++;           
                       return  $this->get();           
           }   

           //  返回上一行的數據記錄(備用)   
           function  prev_line()  {   
                       $this->index=$this->index--;           
                       return  $this->get();           
           }       
           //  返回當前行的數據記錄數據較小   
           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;           
           }       
           //  返回當前行的數據記錄數據較大   
           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  $line;           
           }       
           //  打開數據文件---以一維數組返回文件內容   
           function  read_file()  {   
                       if  (file_exists($this->file))  {   
                                   $line  =file($this->file);   
                       }   
                       return  $line;   
           }   
           //  打開數據文件---以二維數組返回文件內容   
           function  openFile()  {   
                       if  (file_exists($this->file))  {   
                                   $f  =file($this->file);   
                                   $lines  =  array();   
                                   foreach  ($f  as  $rawline)  {   
                                               $tmpline  =  explode("\x0E",$rawline);   
                                               array_push($lines,  $tmpline);   
                                   }   
                       }   
                       return  $lines;   
           }   
           //  傳入一個數組,合並成一行數據,重寫整個文件   
           function  overwrite($array){   
                       $newline  =  implode("\x0E",$array);               
                       $f  =  fopen($this->file,"w");   
                       flock($f,LOCK_EX);   
                       fputs($f,$newline);   
                       fclose($f);   
           }   

           //  添加一行數據記錄到文件末端   
           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);     
           }           

           //  插入一行數據記錄到文件最前面   
           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);   
           }   

           //  更新所有符合條件的數據記錄,適用於每行字節數據較大的情況   
           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);   
           }   

           //  更新所有符合條件的數據記錄,適用於每行字節數據較小的情況   
           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);   
           }   

           //  刪除所有符合條件的數據記錄,適用於每行字節數據較大的情況   
           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($f,LOCK_EX);   
                       fputs($f,$newfile);   
                       fclose($f);   
           }           

           //  刪除所有符合條件的數據記錄,適用於每行字節數據較小的情況   
           function  delete2($column,$query_string){       
                       $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  .=  $line;   
                                   }   
                       }   
                       fclose($f);   
                       $f  =  fopen($this->file,"w");   
                       flock($f,LOCK_EX);   
                       fputs($f,$newfile);   
                       fclose($f);   
           }   

       //取得一個文件裡某個字段的最大值   
           function  get_max_value($column)  {   
                       $tlines  =  file($this->file);   
                       for  ($i=0;$i<=count($tlines);$i++)  {   
                                   $line=explode("\x0E",$tlines[$i]);   
                                   $get_value[]=$line[$column];   
                       }   
               $get_max_value  =  max($get_value);   
                       return  $get_max_value;   
           }   

   
           //  根據數據文件的某個字段是否包含$query_string進行查詢,以二維數組返回所有符合條件的數據   
           function  select($column,  $query_string)  {   
                       $tline  =  $this->openfile();   
                       $lines  =  array();   
                       foreach  ($tline  as  $line)  {   
                                   if  ($line[$column]  ==  $query_string)  {   
                                               array_push($lines,  $line);   
                                   }   
                       }   

                       return  $lines;   
           }   

           //  功能與function  select()一樣,速度可能略有提升   
           function  select2($column,  $query_string)  {   
                       if  (file_exists($this->file))  {   
                                   $tline  =  $this->read_file();   
                                   foreach  ($tline  as  $tmpLine)  {   
                                               $line  =  $this->make_array($tmpLine);   
                                               if  ($line[$column]  ==  $query_string)  {   
                                                           $lines[]=$tmpLine;   
                                               }   
                                   }   
                       }   

                       return  $lines;   
           }   

           //  根據數據文件的某個字段是否包含$query_string進行查詢,以一維數組返回第一個符合條件的數據   
           function  select_line($column,  $query_string)  {   
                       $tline  =  $this->read_file();   
                       foreach  ($tline  as  $tmpLine)  {   
                                   $line  =  $this->make_array($tmpLine);   
                                   if  ($line[$column]  ==  $query_string)  {   
                                       return  $line;   
                                               break;   
                                   }   
                       }   
           }   
           //  select  next/prev  line(next_prev  ==>  1/next,  2/prev)  by  cx   
           function  select_next_prev_line($column,  $query_string,  $next_prev)  {   
                       $tline  =  $this->read_file();   
                       $line_key_end  =  count($tline)  -  1;   
                       $line_key  =  -1;   
                       foreach  ($tline  as  $tmpLine)  {   
                                   $line_key++;   
                                   $line  =  $this->make_array($tmpLine);   
                                   if  ($next_prev  ==  1)  {    //  next?   
                                               if  ($line[$column]  ==  $query_string)  {   
                                                           if  ($line_key  ==  0)  {   
                                                                       return  0;   
                                                           }  else  {   
                                                                       $line_key_up  =  $line_key  -  1;   
                                                                       return  $up_line;   
                                                           }   
                                               }  else  {   
                                                           $up_line  =  $line;   
                                               }   
                                   }  elseif  ($next_prev  ==  2)  {    //  prev?   
                                               if  ($line[$column]  ==  $query_string)  {   
                                                           if  ($line_key  ==  $line_key_end)  {   
                                                                       return  0;   
                                                           }  else  {   
                                                                       $line_key_down  =  $line_key  +  1;   
                                                                       break;   
                                                           }   
                                               }   
                                   }  else  {   
                                               return  0;   
                                   }   
                       }   
                       $down_line  =  $this->make_array($tline[$line_key_down]);   
                       return  $down_line;   
           }   

   
}  
?> 

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