PHP文本操作类


Posted in PHP onNovember 25, 2006
<?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($f,LOCK_EX);    
                       fputs($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小的情况    
           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);    
           }    
       //取得一个文件里某个字段的最大值    
           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;    
           }    
    
           //  根据数据文件的某个字段是否包含$query_string进行查询,以二维数组返回所有符合条件的数据    
           function  select($column,  $query_string)  {    
                       $tline  =  $this->openfile();    
                       $lines  =  array();    
                       foreach  ($tline  as  $line)  {    
                                   if  ($line[$column]  ==  $query_string)  {    
                                               array_push($lines,  $line);    
                                   }    
                       }    
                       return  $lines;    
           }    
           //  功能与function  select()一样,速度可能略有提升    
           function  select2($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  $lines;    
           }    
           //  根据数据文件的某个字段是否包含$query_string进行查询,以一维数组返回第一个符合条件的数据    
           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;    
           }    
    
}   
?> 
PHP 相关文章推荐
模仿OSO的论坛(一)
Oct 09 PHP
10个实用的PHP代码片段
Sep 02 PHP
提示Trying to clone an uncloneable object of class Imagic的解决
Oct 27 PHP
解析CodeIgniter自定义配置文件
Jun 18 PHP
PHP设置图片文件上传大小的具体实现方法
Oct 11 PHP
PHP开启opcache提升代码性能
Apr 26 PHP
PHP中error_reporting()用法详解
Aug 31 PHP
PHP读MYSQL中文乱码的快速解决方法
Oct 01 PHP
Yii 2.0自带的验证码使用经验分享
Jun 19 PHP
Laravel框架中VerifyCsrfToken报错问题的解决
Aug 30 PHP
JSON PHP中,Json字符串反序列化成对象/数组的方法
May 31 PHP
Aliyun Linux 编译安装 php7.3 tengine2.3.2 mysql8.0 redis5的过程详解
Oct 20 PHP
小偷PHP+Html+缓存
Nov 25 #PHP
怎么样可以把 phpinfo()屏蔽掉?
Nov 24 #PHP
如何使用PHP中的字符串函数
Nov 24 #PHP
PHP常用代码
Nov 23 #PHP
给初学PHP的5个入手程序
Nov 23 #PHP
PHP中的日期及时间
Nov 23 #PHP
文件系统基本操作类
Nov 23 #PHP
You might like
咖啡磨器 如何选购一台适合家用的意式磨豆机
2021/03/05 新手入门
Windows中安装Apache2和PHP4权威指南
2006/11/18 PHP
简单的php缓存类分享     php缓存机制
2014/01/22 PHP
Laravel5.7 Eloquent ORM快速入门详解
2019/04/12 PHP
动态为事件添加js代码示例
2009/02/15 Javascript
jquery解决图片路径不存在执行替换路径
2013/02/06 Javascript
利用jquery包将字符串生成二维码图片
2013/09/12 Javascript
js 数值转换为3位逗号分隔的示例代码
2014/02/19 Javascript
js触发onchange事件的方法说明
2014/03/08 Javascript
JavaScript中String.match()方法的使用详解
2015/06/06 Javascript
JavaScript匿名函数之模仿块级作用域
2015/12/12 Javascript
多种JQuery循环滚动文字图片效果代码
2020/06/23 Javascript
jQuery使用模式窗口实现在主页面和子页面中互相传值的方法
2016/03/01 Javascript
Angular.js与Bootstrap相结合实现表格分页代码
2016/04/12 Javascript
浅谈layer的iframe弹窗给里面的标签赋值的问题
2016/11/10 Javascript
javascript动画之磁性吸附效果篇
2016/12/09 Javascript
Angular学习笔记之集成三方UI框架、控件的示例
2018/03/23 Javascript
vue多页面项目中路由使用history模式的方法
2019/09/23 Javascript
JS回调函数简单易懂的入门实例分析
2019/09/29 Javascript
Python进程间通信用法实例
2015/06/04 Python
win系统下为Python3.5安装flask-mongoengine 库
2016/12/20 Python
python opencv实现证件照换底功能
2019/08/19 Python
基于Python计算圆周率pi代码实例
2020/03/25 Python
pyMySQL SQL语句传参问题,单个参数或多个参数说明
2020/06/06 Python
CSS3 网页下拉菜单代码解释 中文翻译
2010/02/27 HTML / CSS
基于html5实现的图片墙效果
2014/10/16 HTML / CSS
Bally巴利英国官网:经典瑞士鞋履、手袋及配饰奢侈品牌
2018/05/07 全球购物
The Hut英国:英国领先的豪华在线百货商店
2019/07/26 全球购物
澳大利亚手袋、珠宝和在线时尚精品店:The Way
2019/12/21 全球购物
用JAVA实现一种排序,JAVA类实现序列化的方法(二种)
2014/04/23 面试题
制冷与电控专业应届生求职信
2013/11/11 职场文书
股权转让意向书
2014/04/01 职场文书
初中毕业典礼演讲稿
2014/09/09 职场文书
关于对大人不礼貌的检讨书
2014/09/29 职场文书
装配车间主任岗位职责
2015/04/08 职场文书
python中的sys模块和os模块
2022/03/20 Python