PHP text manipulation class_PHP tutorial

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;   
           }   

   
}  
?>