function _date_is_valid($str) {

    if (substr_count($str, '-') == 2) {

       list($y, $m, $d) = explode('-', $str);

       if(checkdate($m, $d,sprintf('%04u', $y))){

		   return true;
		   }else{
			   return false;

}}

    return false;
}

Then prepare the date for Mysql data insertion

$date = date('Y-m-d', strtotime(str_replace('-', '/', $_POST['date'])));

function checkEmail($email) {
if (filter_var($email, FILTER_VALIDATE_EMAIL)) {

  list($username,$domain)=explode('@',$email);
  if(!checkdnsrr($domain,'MX')) {

   return false;
  }
  return true;
 }
 return false;
}

to use this function you can do the following

if(!checkEmail($email)) { return false; echo "Not a valid email address";}else{ return true; echo "A valid email address";}

Users and DBA’s (Database Admins) create, delete, manipulate:

Show all users in the mysql database:
mysql> SELECT * FROM mysql.user;

Delete a null user:
mysql> DELETE FROM mysql.user WHERE user = ‘ ‘;

Delete all users who are not root:
mysql> DELETE FROM mysql.user WHERE NOT (host=”localhost” AND user=”root”);

Change root user to a less-guessable name (for security):
mysql> UPDATE mysql.user SET user=”mydbadmin” WHERE user=”root”;

Create a new DBA:
mysql> GRANT ALL PRIVILEGES ON *.* TO ‘username’@'localhost’ IDENTIFIED BY ‘mypass’ WITH GRANT OPTION;

Add a new user with specific privileges on a specific database:
mysql> GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES ON mydatabase.* TO ‘username’@'localhost’ IDENTIFIED BY ‘mypass’;

Add a new DBA with all privileges to a specific database:
mysql> GRANT ALL PRIVILEGES ON mydatabase.* TO ‘username’@'localhost’ IDENTIFIED BY ‘mypass’ WITH GRANT OPTION;

Change a user or DBA password:
mysql> UPDATE mysql.user SET password=oldpass(“newpass”) WHERE User=’username’;

Delete a user or DBA from the database:
mysql> DELETE FROM mysql.user WHERE user=”username”;

Simple database manipulation:

Show all databases:
mysql> SHOW DATABASES;

Create a database:
mysql> CREATE DATABASE mydatabase;

Use a specific database:
mysql> USE mydatabase;

Delete a database:
mysql> DROP DATABASE mydatabase;

Rename a database from command line (not from within MySQL), there is purposely no space beween -p and mypass:

mysqldump -u dbauser -pmypass databasename > mybackup.sql

mysql -u dbauser -pmypass newdatabasename < mybackup.sql

Show the last 200 queries to your database with the sample table name “queries” and the sample field “query_id”:

mysql> SELECT * FROM queries ORDER BY query_id DESC LIMIT 200;

Simple table manipulation:

Show all tables within a previously selected database
mysql> SHOW TABLES;

Show data within a specific table in a previously selected database:
mysql> SELECT * FROM tablename;

Rename a table within a specific database:
mysql> RENAME TABLE first TO second;
or
mysql> ALTER TABLE mytable rename as mynewtable;

Drop a table from a specific database:
mysql> DROP TABLE mytable;

Simple column and field manipulation:

Show columns within a table:
mysql> DESC mytable;
or
mysql> SHOW COLUMNS FROM mytable;

Update a field within a previously selected database table:
mysql> UPDATE mytable SET mycolumn=”newinfo” WHERE mycolumn=”oldinfo”;

Select data within a specific table in a previously selected database:
mysql> SELECT * FROM mytable WHERE mycolumn=’mydata’ ORDER BY mycolumn2;

Insert data into a table and its columns within a specific database:
mysql> INSERT INTO mytable VALUES(‘column1data’,'column2data’,'column3data’,'column4data’,'column5data’,'column6data’,'column7data’,'column8data’,'column9data’);

Delete data from specific fields within a column:
mysql> DELETE FROM mytable WHERE mycolumn=”mydata”;

Update data in a specific table, column, field:
mysql> UPDATE mytable SET column1=”mydata” WHERE column2=”mydata”;

Simple backup options:

Backup all databases uncompressed from the command line (not from within MySQL):
backup: mysqldump -u root -pmypass –all-databases > alldatabases.sql

restore full: mysql -u username -pmypass < alldatabases.sql (no space in between -p and mypass)

restore single: mysql -u username -pmypass mydb < mydb.sql (no space in between -p and mypass)

Backup all databases compressed from the command line (not from within MySQL):
With bzip2: mysqldump –all-databases | bzip2 -c > databasebackup.sql.bz2 (use bunzip2 to uncompress)

With gzip: mysqldump –all-databases | gzip > databasebackup.sql.gz (use gunzip to uncompress)

Mini script to backup all databases and tables using gzip:
#!/bin/sh
date=`date -I`
mysqldump –all-databases | gzip > /var/backup/dbbackup-$date.sql.gz

Backup a specific database only:
mysqldump -u username -pmypass databasename > backupfile.sql

Backup database structure only:
mysqldump –no-data –databases databasename > structurebackup.sql

Backup a specific database and specific tables within that database only:
mysqldump –add-drop-table -u username -pmypass databasename table_1 table_2 > databasebackup.sql

The syntax for the command to issue is:
mysqldump -u [username] -p[password] [databasename] [table1 table2 ....] > backupfilename.sql

Backing up only the database structure of specific databases, not the actual data:
mysqldump –no-data –databases db1 db2 db3 > structurebackup.sql

Improve local and remote access security:

Disable the use of LOAD DATA LOCAL INFILE command, which will help to prevent against unauthorized reading from local files. This matters especially when new SQL Injection vulnerabilities in PHP applications are found. This can be set to 1 temporarily for a local admin to import a csv file into the database and then turned off again as well. The mysqld service will need to be restarted after each change.

For that purpose, the following parameter should be added in the [mysqld] section in /etc/my.cnf:

set-variable=local-infile=0

_____________________

The first change applies to the 3306/tcp port, on which MySQL listens by default. Because, according to the initial assumptions, the database will be used only by locally installed PHP applications, we can freely disable listening on that port. This will limit possibilities of attacking the MySQL database by direct TCP/IP connections from other hosts. Local communication will be still possible throw the mysql.sock socket.

In order to disable listening on the mentioned port, the following parameter should be added to the [mysqld] section of /etc/my.cnf:

skip-networking

SSH Tunneling can be used for remote backup scripts which require access to the machine.

Show all databases:
mysql> SHOW DATABASES;

Create a database:
mysql> CREATE DATABASE mydatabase;

Use a specific database:
mysql> USE mydatabase;

Delete a database:
mysql> DROP DATABASE mydatabase;

Rename a database from command line (not from within MySQL), there is purposely no space beween -p and mypass:

mysqldump -u dbauser -pmypass databasename > mybackup.sql

mysql -u dbauser -pmypass newdatabasename < mybackup.sql

Show the last 200 queries to your database with the sample table name "queries" and the sample field "query_id":

mysql> SELECT * FROM queries ORDER BY query_id DESC LIMIT 200;

Installing Repo

cd /etc/yum.repos.d
wget http://rpms.famillecollet.com/enterprise/remi.repo

Installing Mysql

yum –enablerepo=remi install mysql mysql-server mysql-devel php-mysql

Configuring Mysql

Set the MySQL service to start on boot
chkconfig –levels 235 mysqld on

Start the MySQL service
service mysqld start

Log into MySQL
mysql -u root
Set the root user password for all local domains
SET PASSWORD FOR ‘root’@'localhost’ = PASSWORD(‘new-password‘);
SET PASSWORD FOR ‘root’@'localhost.localdomain’ = PASSWORD(‘new-password‘);
SET PASSWORD FOR ‘root’@'127.0.0.1′ = PASSWORD(‘new-password‘);|

Setting up remote access to database
SET host FOR ‘root’@'localhost’ = ‘%’;

Drop the Any user
DROP USER ”@’localhost’;
DROP USER ”@’localhost.localdomain’;

Exit MySQL
exit

$("#insidebox").load("ajax.php?cat="+cat+"&cache=" + Math.random()*99999);

The main problem was that Lytebox gets initialized during page load. Since AJAX bypasses page load, the problem arises.

The Lytebox run by this function initLytebox(); so we just need to call this functions when our ajax parsed data properly.

  <script type="text/javascript">// <![CDATA[  

	if (screen.width <  800) {document.location = "small/index.html";} 

// ]]></script>    

Step 1
———
Load Jquery

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>	

You can put this in the tag

Step 2
——–
Create a html form

 <div class="left-sub">Name: </div><div class="left-sub"><input size="30" name="name" maxlength="45" type="text" id="name"></div> 

 <div class="left-sub">Company: </div><div class="left-sub"><input size="30" name="company" maxlength="45" type="text" id="company"></div> 

 <div class="left-sub">Email: </div><div class="left-sub"><input size="30" name="email" maxlength="45" type="text" id="email"></div>

 <div class="left-sub"></div> <div class="left-sub"><input type="submit" value="click to subscribe" class="myButton2" name="news" id="news" onclick="subscribe();"></div>

you can notice there is a subscribe() function on the submit button which will execute the javascript function where we will have all the Jquery code

Step 3
———-
Creating Jquery Code

function subscribe(){
		 var name = $("#name").val(); // get values from the name field
		  var email = $("#email").val();
		   var company = $("#company").val();

        if(name=='') // validates the name if empty
	{
    	alert("Please enter name!");   // displays alert if empty

    }else if(email==''){alert("Please enter email!");}else if(company==''){alert("Please enter company!");}

	else{
        $.ajax({
			type: "POST",
			url: "index.php",
			data: {

				name : $('#name').val(), company : $('#company').val(), email : $('#email').val(), news : $('#news').val() // This is the data that will be posting in this format you can retreive this data by using $_POST['name'] and so on in php.
			},
            cache: false,
success: function(response){
//alert($(response).find("#responsemessage").text());
$('#responsemessage').html($(response).find("#responsemessage").html()); //You can create a div with id responsemessage and echo the error message in that and this code will display that error or success

}
		});

		}
		}

to understand the code above read the comments next to the line of code

1) Make sure you remove the html and head tags.

2) Make sure to use tables instead of divs

3) You can only use inline style sheet

e.g. <td style="color:red"></td>.

4) All TABLE and TD tags should should have a fixed height and width.

e.g. <td height="200" width="100"></td>

5) If you are using images inside the make sure in the style to make inline-height:0

e.g.<td style=" inline-height:0px">

6) To align or set font colors or styles text or even images inside the i would prefer to use

tag with inline style sheet

e.g.<p style="margin-left:23px">text will come here</p>

7) If you still see spacing under the images try using float:left and display:block in side the image tag

e.g.<img src="img.jpg" style="float:left; display:block">

You cannot use background images only background colors

9) To align the whole newsletter to the center use the code below

 <table width="100%" cellpadding="10" cellspacing="0" bgcolor='#FEFAE7' >
<tr>
<td valign="top" align="center">
<strong>here your enitire news letter will come with divs</strong>
</TD>
</TR>
</TABLE>

10) To change the background of the newsletter you can do that in the body tag.

<BODY  leftmargin="0" marginwidth="0" topmargin="0" marginheight="0" offset="0" bgcolor='#212121'>

First Include Jquery

 <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>

Then in the head tag write the following code

<script type="text/javascript">
		  $(document).ready(function(){
	$("#nameofthediv").height( $(document).height() ); 

});
	</script>

and the div you can use the style like this

<div id="nameofthediv" style="top:0; left:0; width:100%; background-color:black">
 some text here</div>

the sample of the virtual host with rewrite url code will look like this

server {
    server_name examplesite.com;
    access_log /var/www/html/examplesite.com/logs/access.log;
    error_log /var/www/html/examplesite.com/logs/error.log;
    root /var/www/html/examplesite.com;

       index index.html index.htm index.php;

if (!-e $request_filename)
	{
rewrite  ^/channel/(.*)/(.*)/(.*)/(.*)$  /index.php?urd=$1&uri=$2&cat=$3&title=$4 last;
rewrite  ^/channel/(.*)/(.*)/(.*)$  /index.php?urd=$1&cat=$2&title=$3 last;

break;

}

    location ~ \.php$ {
        include /etc/nginx/fastcgi_params;
        fastcgi_pass  127.0.0.1:9000;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME /var/www/html/examplesite.com$fastcgi_script_name;
    }
}