do_action('wp_login', 'custom_function_name');

$a=1;
$b=1;
$i=0;
while($a<=5){
	while($i < 4){
		echo $a . ' ' . $b . '<br/>';
		$b++;
		$i++;
	}
	$a++;
	$i = 0;
}

$yourEmail = 'email@example.com, email2@example.org';

$yourEmail = 'email@example.com, email2@example.org, ' . $_POST ['email'];

if exists(select * from <table_name>)
begin
     select top 1 @last_id=session_id from <table_name> order by session_id desc
     --use substring() method to cut out the 'S' and add 1 to 
     --the existing value in another variable. this will cut 
     --out pre zero's. so you

<img class="img" src="" />

.img{
float:left;
}

<div class="left">left</div>
<div class="middle">middle</div>
<div class="right">right</div>

<div class="left">left</div>
<div class="right">right</div>
<div class="middle">middle</div>