<?php

// Usage
// $htpasswd = new htpasswd('.htpasswd'); 
// path to your .htpasswd file

// Usage Example
  //  if($htpasswd->user_update($user,$password))
 //   {
  //  	echo "Password updated successfully for '".$user."'\n";
  //  } 
 //   else
 //   {
 //   	echo "Password updated failed for '".$user."'\n";
 //   }

// Save as .htpasswd.php
class htpasswd {
	var $fp;
	var $filename;
 
	function htpasswd($filename) {
		@$this->fp = fopen($filename,'r+') or die('Invalid file name');
		$this->filename = $filename;
	}
 
	function user_exists($username) {
		rewind($this->fp);
			while(!feof($this->fp) && trim($lusername = array_shift(explode(":",$line = rtrim(fgets($this->fp)))))) {
				if($lusername == $username)
					return 1;
			}
		return 0;
	}
 
	function user_add($username,$password) {
		if($this->user_exists($username))
			return false;
		fseek($this->fp,0,SEEK_END);
		fwrite($this->fp,$username.':'.crypt($password,substr(str_replace('+','.',base64_encode(pack('N4', mt_rand(),mt_rand(),mt_rand(),mt_rand()))),0,22))."\n");
		return true;
	}
 
	function user_delete($username) {
		$data = '';
		rewind($this->fp);
		while(!feof($this->fp) && trim($lusername = array_shift(explode(":",$line = rtrim(fgets($this->fp)))))) {
			if(!trim($line))
				break;
			if($lusername != $username)
			$data .= $line."\n";
		}
		$this->fp = fopen($this->filename,'w');
		fwrite($this->fp,rtrim($data).(trim($data) ? "\n" : ''));
		fclose($this->fp);
		$this->fp = fopen($this->filename,'r+');
		return true;
	}
 
	function user_update($username,$password) {
		rewind($this->fp);
			while(!feof($this->fp) && trim($lusername = array_shift(explode(":",$line = rtrim(fgets($this->fp)))))) {
				if($lusername == $username) {
					fseek($this->fp,(-15 - strlen($username)),SEEK_CUR);
					fwrite($this->fp,$username.':'.crypt($password,substr(str_replace('+','.',base64_encode(pack('N4', mt_rand(),mt_rand(),mt_rand(),mt_rand()))),0,22))."\n");
					return true;
				}
			}
		return false;
	}
}

?>