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PHP

PHP(Hypertext Preprocessor)is a general-purpose server-side scripting language originally designed for web development to produce dynamic web pages. For this purpose, PHP code is embedded into the HTML source document and interpreted by a web server with a PHP processor module, which generates the web page document.

Connection Query to Database mysql
<?php
$con = mysql_connect("localhost","root","");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("dbname",$con);
?>
Including a file 
include("connection.php");
Login

<?php
// login
if(isset($_REQUEST['im']))
{
echo $_SESSION['str'];

}

if(isset($_POST['btn_submit']))
{

$login_rs = mysql_query("select * from tablename where user='" . $_POST['txt_name'] ."' and password='" . $_POST['txt_password']."'");
$arr=mysql_fetch_array($login_rs);
if($arr!="")
{
//echo "inside";
$_SESSION['uid']=$arr['1'];
$nme=$_POST['txt_name'];

header("location:welcome.php?nme=$nme");
}

else{
$str= "Login Error....";
$_SESSION['str']=$str;
//echo $_SESSION['str'];
header("location:index.php?im=1");
}
}?>

Date Function 
$date = date('l dS \of F Y '); echo "$date";
Logout session destroy
session_start(); ob_start(); session_destroy(); $_SESSION['uid']=""; header("Location:index.php"); /* Redirect loginpage*/
Session checking
ob_start(); session_start(); //session_start(); if(!isset($_SESSION['uid'])) { header("location:index.php"); }
Inserting to database 
if(isset($_POST['btn_Submit']))
{
$designation=$_POST['designation'];
$jobpr=$_POST['jobprofile'];
//echo $nme;
$dd="insert into tablename value('','$designation','$jobpr')";
//echo $dd;
mysql_query($dd) or die(mysql_error());
$string= " Saved Successfully ";
echo "$string"; }
select values from database

<?php
$result = mysql_query("SELECT * FROM tablename") or die(mysql_error()) ;
while($row = mysql_fetch_array($result))
{
?>
<?php echo $row['feildname or 0']?>
<?php } ?>

Deleting using radiobutton 
if(isset($_POST['delete']))
{ $id=$_POST['radiobutton'];
$id="$id";
mysql_query("DELETE FROM tablename WHERE name='$id' ");
$str= " deleted successfully "; }
Red color giving to variable
<font color='red'> $variablename</font>
combobox listing using php
<?php
$result=mysql_query("select * from tablename");
while($row=mysql_fetch_array($result))
{
?>
<option value=" <?php echo $row['1']; ?>"> <?php echo $row['1']; ?></option>
<?php
// End while loop.
}
?>
</select>
php code using redirect to folder 
header( 'Location: http://www.name.com/foldername' ) ;
Speed test joomla site 
http://www.joomlaspan.com/webtools/website-speed-test-tool.php
Speed test joomla site 
http://www.joomlaspan.com/webtools/website-speed-test-tool.php