PHP class for text file operations

var $file; var $index; Create a file and write the input function Null_write ($new) { $f =fopen ($this->file, "w"); Flock ($f, LOCK_EX); Fputs ($f, $new); Fclose ($f); } Add data record to end of file function Add_write ($new) { $f =fopen ($this->file, "a"); Flock ($f, LOCK_EX); Fputs ($f, $new); Fclose ($f); } Used with the return of ReadFile () to convert a row of data to a one-dimensional array function Make_array ($line) { $array = Explode ("\\x0E", $line); return $array; } Converts a row of data for a one-dimensional array function Join_array ($line) { $array = Join ("\\x0E", $line); return $array; } Returns the total number of data file rows function Getlines () { $f =file ($this->file); return count ($f); } Returns the data record for the next row (alternate) function Next_line () { $this->index= $this->index++; return $this->get (); } Returns the data record for the previous row (alternate) function Prev_line () { $this->index= $this->index--; return $this->get (); } Returns the data record data for the current row is small 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; } Returns the data record data for the current row is large 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 $line; } Open Data File---Return file contents in one-dimensional array function Read_file () { if (file_exists ($this->file)) { $line =file ($this->file); } return $line; } Open Data File---Return file contents in a two-dimensional array function OpenFile () { if (file_exists ($this->file)) { $f =file ($this->file); $lines = Array (); foreach ($f as $rawline) { $tmpline = Explode ("\\x0E", $rawline); Array_push ($lines, $tmpline); } } return $lines; } Pass in an array, merge into one row of data, rewrite the entire file function overwrite ($array) { $newline = Implode ("\\x0E", $array); $f = fopen ($this->file, "w"); Flock ($f, LOCK_EX); Fputs ($f, $newline); Fclose ($f); } Add a row of data records to the end of a file 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); } Insert a row of data records to the front of the file 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); } Update all eligible data records for large byte-per-row data 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 $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); } Update all eligible data records for smaller byte data per row 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); } Delete all eligible data records for large byte-per-row data function Delete ($column, $query _string) { $newfile = ""; $FC =file ($this->file); $f =fopen ($this->file, "R"); Flock ($f, lock_sh); for ($i =0; $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); } Delete all eligible data records for smaller byte data per row 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); } Get the maximum value of a field in a file 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; } Returns all eligible data in a two-dimensional array, based on whether a field in the data file contains $query_string function Select ($column, $query _string) { $tline = $this->openfile (); $lines = Array (); foreach ($tline as $line) { if ($line [$column] = = $query _string) { Array_push ($lines, $line); } } return $lines; } Functions like function Select (), speed may be slightly improved function Select2 ($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; } Returns the first qualifying data in a one-dimensional array, based on whether a field in the data file contains $query_string function Select_line ($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; } ?> Copy Code

Text files, PHP

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