Database Class using PHP

Hi PHP Developers,
I wrote a Database utility class, which is used mostly in any projects. If you've this class, then you don't need to write queries each & every time when a new project comes. You can just copy this file & paste it in your class directory & can call it anytime. The class written below is very simple & it can be understood to the novice also. There will be a way to minimize the functions & statements inside the class too, if so, don't regret to post it in comments.

<?php
/*-----------------------------------------------------------------------
Created By:   Sathish Kumar.R
Date:         30 July 2010
E-mail:       smart2raise[at]gmail[dot]com
Purpose:      Database Manipulation


Functions Available:
db:           Constructor (for mysql connect)
query:        Executing query(mysql_query)
num_rows:     Finding total rows(mysql_num_rows)
fetch_object: Fetch results in Object (mysql_fetch_object)
fetch_array:  Fetch results in Array (mysql_fetch_array)
fetch_assoc:  Fetch results in Array (mysql_fetch_assoc)
insert:       Insert query (Insert into...)
insert_id:    Gets last inserted ID (mysql_insert_id)
update        Update query (Update ...)
delete        Delete query (Delete ...)
countof:      Count function in mysql
maxof:        Max function in mysql
sumof:        Sum function in mysql
avgof:        AVG function in mysql
last_query:   Displays the query which you executed last
throw_error:  If any mysql error occurs & you set $debug = true then it will show the query & the mysql error
-------------------------------------------------------------------------*/
class db{
var $debug = false;
var $query = array();
var $prefix = "";
function db($server,$username,$pwd,$db){
 mysql_connect($server,$username,$pwd) or die('Please check your database connection');
 mysql_select_db($db);
}
function query($qry){
 $this->query[] = $qry;
 $res = mysql_query($qry);
 if(mysql_error()){
  $this->throw_error();
 }
 return $res;
}
function num_rows($res){
 return mysql_num_rows($res);
}
function fetch_object($res){
 $fet = mysql_fetch_object($res);
 return $fet;
}
function fetch_array($res){
 $fet = mysql_fetch_array($res);
 return $fet;
}
function fetch_assoc($res){
 $fet = mysql_fetch_assoc($res);
 return $fet;
}
function insert($val,$table){
 $query = 'INSERT INTO '.$table.' (';
  foreach ($val AS $key => $value)
   $query .= '`'.$key.'`,';
 $query = rtrim($query, ',').') VALUES (';
  foreach ($val AS $key => $value){
   if(get_magic_quotes_gpc())
    $query .= '\''.$value.'\',';
   else
   $query .= '\''.mysql_real_escape_string($value).'\',';
  }
 $query = rtrim($query, ',').')';
 return $this->query($query);
}
function insert_id(){
 return mysql_insert_id();
}
function update($val,$table,$con){
 if($con!=""){
   $where = "where ";
   $lastitem = end($con);
  foreach ($con AS $key => $value){
   if($value!=$lastitem){
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."' && ";
    else
    $where .= $key."='".mysql_real_escape_string($value)."' && ";
   }
   else{
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."'";
    else
     $where .= $key."='".mysql_real_escape_string($value)."'";
   }
  }
 }
 else
 {
  $where = "";
 }
 $query = 'update '.$table.' set ';
 foreach ($val AS $key => $value){
  if(get_magic_quotes_gpc())
   $query .= $key."=".'\''.$value.'\',';
  else
  $query .= '\''.mysql_real_escape_string($value).'\',';
 }
 $query = rtrim($query, ',')." ".$where;
 return $this->query($query);
}
function delete($table,$con){
 if($con!=""){
   $where = "where ";
   $lastitem = end($con);
  foreach ($con AS $key => $value){
   if($value!=$lastitem){
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."' && ";
    else
    $where .= $key."='".mysql_real_escape_string($value)."' && ";
   }
   else{
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."'";
    else
     $where .= $key."='".mysql_real_escape_string($value)."'";
   }
  }
 }
 else {
  $where = "";
 }
 return $this->query("delete from {$table} {$where}");
}
function countof($col,$table,$con="",$group=""){
 if($con!=""){
   $where = "where ";
   $lastitem = end($con);
  foreach ($con AS $key => $value){
   if($value!=$lastitem){
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."' && ";
    else
    $where .= $key."='".mysql_real_escape_string($value)."' && ";
   }
   else{
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."'";
    else
     $where .= $key."='".mysql_real_escape_string($value)."'";
   }
  }
 }
 else {
  $where = "";
 }
 if($group!="")
  $groupby = "group by ".$group;
 else
  $groupby = "";
 $query = $this->query("select count({$col}) from {$table} {$where} {$groupby}");
 $fet = $this->fetch_array($query);
 return $fet[0];
}
function maxof($col,$table,$con="",$group=""){
 if($con!=""){
   $where = "where ";
   $lastitem = end($con);
  foreach ($con AS $key => $value){
   if($value!=$lastitem){
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."' && ";
    else
    $where .= $key."='".mysql_real_escape_string($value)."' && ";
   }
   else{
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."'";
    else
     $where .= $key."='".mysql_real_escape_string($value)."'";
   }
  }
 }
 else {
  $where = "";
 }
 if($group!="")
  $groupby = "group by ".$group;
 else
  $groupby = "";
 $query = $this->query("select max({$col}) from {$table} {$where} {$groupby}");
 $fet = $this->fetch_array($query);
 return $fet[0];
}
function sumof($col,$table,$con="",$group=""){
 if($con!=""){
   $where = "where ";
   $lastitem = end($con);
  foreach ($con AS $key => $value){
   if($value!=$lastitem){
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."' && ";
    else
    $where .= $key."='".mysql_real_escape_string($value)."' && ";
   }
   else{
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."'";
    else
     $where .= $key."='".mysql_real_escape_string($value)."'";
   }
  }
 }
 else {
  $where = "";
 }
 if($group!="")
  $groupby = "group by ".$group;
 else
  $groupby = "";
 $query = $this->query("select sum({$col}) from {$table} {$where} {$groupby}");
 $fet = $this->fetch_array($query);
 return $fet[0];
}
function avgof($col,$table,$con="",$group=""){
 if($con!=""){
   $where = "where ";
   $lastitem = end($con);
  foreach ($con AS $key => $value){
   if($value!=$lastitem){
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."' && ";
    else
    $where .= $key."='".mysql_real_escape_string($value)."' && ";
   }
   else{
    if(get_magic_quotes_gpc())
     $where .= $key."='".$value."'";
    else
     $where .= $key."='".mysql_real_escape_string($value)."'";
   }
  }
 }
 else {
  $where = "";
 }
 if($group!="")
  $groupby = "group by ".$group;
 else
  $groupby = "";
 $query = $this->query("select avg({$col}) from {$table} {$where} {$groupby}");
 $fet = $this->fetch_array($query);
 return $fet[0];
}
function last_query(){
 return end($this->query);
}
function throw_error(){
 if($this->debug==true){
 $qry = "".end($this->query)."<br>";
 }
 else{
 $qry = "";
 }
 die("<div style='width:500px; margin:auto; text-align:left; color:red; font-size:12px;border:2px solid #FFD700;vertical-align:middle; line-height:19px;background:#FFFFDD;font-family:verdana;padding:3px;'>".$qry."Mysql Error: ".mysql_error());
}
}
?>

<?php
//Usage of Class:


$hostname = "hostname";
$username = "username";
$password = "";
$database = "dbname";
$db = new db($hostname,$username,$password,$database);
$db->debug = true;
//If it is set to true, then mysql error will shown the query which throws the error.

$qry = $db->query("select columnname from tablename"); //Executing query
$db->num_rows($qry); //Finding total rows

$val = array("a"=>123,"b"=>"sathish","c"=>"kumar");

$a = $db->insert($val,"tablename");
/*Note: $val should be an array, else it will throw error Key in an array should be the column name in the table & value can be any value */

$db->insert_id(); //returns the last inserted ID in the database

$val1 = array("a"=>123,"b"=>"Sathish","c"=>"Kumar");

$db->update($val1,"tablename",array("id"=>2));
/*
Update query same as insert query, you can pass multiple conditions in the 3rd argument i.e array("id"=>2,"a"=>'123')
*/

$db->delete("tablename",array("id"=>4));
//You can pass multiple conditions in 2nd argument


$db->countof("id","tablename",array("a"=>123123));


$db->maxof("id","tablename",array("a"=>123123));


$db->avgof("id","tablename",array("a"=>123123));

/*
 for countof(),maxof(),avgof() you can pass additional argument group by


$db->countof("id","tablename",array("a"=>123123),"c");

this will result as "select count(id) where a = '123123' group by c"
*/

$db->last_query() //This will return last executed query
?>

Detect Firebug console using Javascript

Hi Developers,
Nowadays Firebug console is one of the best tool to debug html or javascript or AJAX or css. In the same time it allows any user to see the datas passed in between the pages. It is not a secure method for our website. Gmail has blocked firebug console because of this activities. You can able to login to gmail with firebug console but it will say that "If your firebug console is ON, then gmail will become slow". So you definitely switch off your firebug console. So in the same way, we save our website from firebug.

You can prevent this using javascript.

In your page load call this function

  
<script type='text/javascript'>
function blockfirebug(){
   if(window.console.firebug!=""){
      document.location.href="firebug_error.html";
      return false;
   }
}
<script>

<body onload='return blockfirebug()'>