PHP text manipulation class_PHP tutorial-PHP Tutorial-php.cn

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class CtbClass {                                              file and write input 
 function null_write ($new) 
 { 
 $f=fopen($this->file,"w"); 
 LOCK_EX); 
 fputs($f,$new) ;                                                                       add_write($new) {                                                            "a");                                                                                                                                                             Back to use together, convert a line of data into a one -dimensional array 
 Function Make_array ($ LINE) {
 $ array = Explode ("x0e", $ line); 
 Return $ array; 
} 

 //Convert a row of data into a one-dimensional array 
 function join_array($line) { 
 $array = join("x0E",$line); 
                                                                                                                                                                                                              🎜>         }
 // The number of head lines returned to the data file 
 Function Getlines () {
 $ F = File ($ this- & gt; file); 
 Return Count ($ f); 🎜>                                                                                                    ​
                                                                                                                                                                                                                                        ;                                                                                                                                                                        ​​​function get() { 
 $f=fopen($this-> ;file,"r");    
     Flock($f,LOCK_SH); 
 $rec= fgets($f,1024);                                                                                  fclose($f);                                                   
                                                                                                               
 flock($f, LOCK_SH); 
 for($i=0;$i<=$this->index;$i++) { 
 $rec=fgets($f, 1024*5);           
                                                                                  >                $line=explode("x0E",$rec);                                                                                                                                                                                                     File content                                                                                                                                                                        $line                                                                                                                 $line; 
 }
                                                                                                                                                               🎜>                                                                                                             $this->file); 
 foreach ($f as $ rawline) {                                                          array_push ($lines, $tmpline);                                            turn $lines; 
                                                                                     overwrite($array){                                                                                                                                       ;file,"w");                                                                       LOCK_EX); 
 fputs($f,$newline); 
 fclose($f); 
 fputs($f,$newline);

 // Add a row of data records to the end of the file 
 function add_line($array,$check_n=1) { 
 $s=implode("x0E ",$array);            
                                       f=fopen($this->file,"a");                                                                                                                                                         fputs($f,"n");                                                            Data is recorded to the front of the file                                                                                                                                                                                        ​​​                 flock($f,LOCK_SH);                                                       ($line = fgets($f,1024)) {                                                     fclose($f); 
 $f = fopen($this->file , "w");                                                                                fclose($f); 
 }

                                                                                                                    $update_string = implode ("x0E",$update_array); ;                                                                                                             r"); 
 flock($f,LOCK_SH); 
 for ($i=0;$i $list = explode("x0E", $fc[$i]);                                                                                                  $newfile                                                                                                                                                >} Else {
 $ newfile = $ newfile. $ Update_string; 
} 
} 
 FCLOSE ($ f); 
 $ f = FOPEN ($ this- & gt; file, "w "); 
 flock($f,LOCK_EX); 
 fputs($f,$newfile); 
 fclose($f); 
 }

                                                                                                                    $newline = implode ("x0E",$update_array); 
 flock($f,LOCK_SH); < ~ ;                                                                                                                                                        F> $ newfile. = $ Newline; 
} else {
 $ newfile. = $ Line; 
} 
} 
 fclose ($ f); 
 $ f = FOPEN ( $this->file,"w");                                                                                                                                                  

                                                                                                                                   "";                        🎜>                    $fc=file($this->file);                                                        flock($f,LOCK_SH); 
 for ($i=0;$i FLOCK ($ f, lock_ex); 
 fputs ($ f, $ newfile); 
 fclose ($ f); 
 }

                                                                                                                      = ""; 
                       $f                                                                                                                                                                                                                                                        ($line                                                                                                                       $tmpLine = explode("x0E",$line);                                                                                 
                                                                              f,LOCK_EX);                                                     
                                                                                                                                                    ) {                                                                                                this->file); 
 for ($i=0;$i<=count($tlines);$i++) { 
 $line=explode("x 0E",$tlines[$i]) ;                                                                                                               
 $ get_max_value = max ($ get_value); 
 Return $ get_max_value; 
} 
 
 // Whether a field of the data file contains $ query_string to query, two Dimensional array returns all data that meets the conditions                                                                                                                               $lines = array(); 
 foreach ($tline as $line) {                                                                                                          array_push($lines,                                                                                                                                                                      🎜 >                                                                                                                                                                                                                                                                                         

 // The function is the same as function select(), the speed may be slightly improved. 
 function select2($column, $query_string) { 
 if (file_ exists($this->file)) { 
                                                                                                                                                                                               $tline                                 ine) {                                                              If ($ line[$column] == $query_string) {                                                                                                                                                             🎜> return $lines; 
 }
 > // Whether a field of the data file contains $ Query_String to query, and return the first data with a one -dimensional array 
 Function Select_line ($ COLUMN, $ Queery_String) {
 $tline = $this->read_file(); 
 foreach ($tline as $tmpLine) { 
 $line = $this->make_array($tmpLine); 
 column] == $query_string) {                                                                 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;    
           }    

    
}   
?> 