Classes for text manipulation in php_PHP tutorial

Let me give you a simple text operation class
I wrote it before, but I never had the chance to use it. Text is not as good as a database
Data is saved in rows and ends with n. Please note that the data you enter must end with " n", these are the most basic class members. For text, special attention should be paid to efficiency issues. For example, if you want to update lines 2, 3, and 4 of the file, use:
for($i=2;$i< ;=4;$i++)$this->update($file,$i,$msg);Not as good as this:
$data=$this->read($file);
for( $i=2;$i<=4;$i++)$data[$i]=$msg;
$this->write($file,$data); of


class text{
var $key=""; //Data protection
var $keylen; //Data protection length
function text() //Class construction Device
{
$this->keylen=strlen($this->lkeylen); //Get the protected length
}
function read($file) //Read the file and return a Array
{
if(file_exists($file)):
$data=@file($file);
$data[0]=substr($data[0],$this- >keylen);
return $a;
endif;
}
function write($file,$data=array()) //Write the file, the data is an array
{
if($fp=fopen($file,"w")):
flock($fp,3);
fwrite($fp,$this->key);
foeach ($data as $v)fwrite($fp,$v);
return true;
endif;
}
function add($file,$msg)
//Add to file Finally add the data (create the file first if it does not exist)
{
$a=$this->read($file); //This does not matter whether the file exists or not
$a[]=$msg;
return $this->write($file,$a);
}
function insert($file,$n,$msg) //Insert data before $nth
{
if($a=$this->read($file)):
$a[$n]=$msg.$a[$n];
return true;
endif ;
}
function updata($file,$n,$msg) //Update $n data
{
if($a=$this->read($file)):
$a[$n]=$msg;
return true;
endif
}
function del($file,$n) //Delete $n data
{
return $this->updata($file,$n,"");
}
}

http://www.bkjia.com/PHPjc/318147.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/318147.htmlTechArticleI will give you a simple text operation class that I wrote before, but I have never had the chance to use it. Text is not as good as Database data is saved in rows, ending with n. Please note that the data you enter must...