www.gusucode.com > 渝海百度收录查询工具 1.3 > code/Textclass.php

    <?php 
class CtbClass { 
	var $file='list.txt'; 
	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; 
	}

} 
?>