<?php

echo "My first PHP script!";
echo "<br>";
$x = 5+5;
echo $x;
echo "<br>";
//--------------------------------------------------------
echo gettype($x);  //return datatype
echo "<br>";

$color="red";
echo "Color is ".$color."<br>";

define("Name", "Lovely Professional University");  //constant
echo Name;
echo "<br>";

printf("Regno is %d",11604722);
echo "<br>";

var_dump($x);  //return datatype and value
echo "<br>";
//-----------------------------------------------------------
$cars = array("Audi","BMW","Toyota");   //array
echo "First Car is ".$cars[0]."<br>";
var_dump($cars);
echo "<br>";
//-----------------------------------------------------------------------
echo strlen("Hello World!");  //returns the length of a string
echo "<br>";
echo str_word_count("Hello World!"); //counts the number of words in a string
echo "<br>";
echo strrev("Hello World!"); //reverses a string
echo "<br>";
echo strpos("Hello World!", "World"); //searches for a specific text within a string
echo "<br>";
echo str_replace("World", "India", "Hello World!"); //replaces some characters with some other characters in a string
echo "<br>";

$temp="Smoking is good for Health";
echo str_replace("good", "bad", $temp,$count)."<br>";
echo $count."<br>";
//-------------------------------------------------------------------------------------------------------------------
$a=10;
$b=10;
var_dump($a==$b); //Equal
echo "<br>";
var_dump($a===$b); //Identical
echo "<br>";
var_dump($a!=$b); //Not equal
echo "<br>";
var_dump($a<>$b); //Not equal
echo "<br>";
var_dump($a!==$b); //Not identical
echo "<br>";
var_dump($a>$b); //Greater than
echo "<br>";
var_dump($a<$b); //Less than
echo "<br>";
var_dump($a>=$b); //Greater than or equal to
echo "<br>";
var_dump($a<=$b); //Less than or equal to
echo "<br>";
//----------------------------------------------------------
echo $a++."<br>";  //Pre-increment
echo ++$a."<br>";  //Post-increment
echo $b--."<br>";  //Pre-decrement
echo --$b."<br>";  //Post-decrement

$a=20;				// decision making
if($a==2)
{
	echo "Hello World"."<br>";
}
elseif ($a=="20")
{
	echo "This is string value";
}
else
{
	echo "Hello Class";
}
//-------------------------------------------------------------
$year=2016;
if($year%4==0 && ($year%100!=0 || $year%400!=0))
{
	echo "<br>"."Leap Year";
}
else
{
	echo "Not a Leap Year";
}
//------------------------------------------------------------------
$var=12345;
if ($var%3==0)
{
	echo "<br>"."Divisible by 3";
}
if ($var%5==0)
{
	echo "<br>"."Divisible by 5";
}
if ($var%3==0 && $var%5==0)
{
	echo "<br>"."Divisible by 3 and 5";
}
else
{
	echo "<br>"."Not Divisible by 3 or 5";
}

//-------------------------------------------------------------------------------------
echo "<br>".date("d");  //The day of the month (from 01 to 31)
echo "<br>".date("D");	//A textual representation of a day (three letters)
echo "<br>".date("H");	//24-hour format of an hour (00 to 23)
echo "<br>".date("A");  //Uppercase AM or PM
echo "<br>".date("L");	//Whether it's a leap year (1 if it is a leap year, 0 otherwise)
echo "<br>".date("Y-m-d"); //Year date month

//----------------------------------------------------------------------
$a=10;
$b=5;
$c="/";
switch($c)
{
	case "+": echo $a+$b;
				break;

	case "-": echo $a-$b;
				break;
}


//--------------------------------------------------------------------
$start = 1;
$end = 10;

$sum = 0;
for ($i = $start; $i <= $end; $i++) {
    $sum += $i;
}

echo "<br>"."Sum from " . $start . " to " . $end . " = " . $sum;
//---------------------------------------------------------------------
$arr=array("Abc",10,20);
echo "<br>";
print_r($arr);
echo "<br>".count($arr);
echo "<br>".$arr[0]."<br>";
var_dump($arr);
for($i=0;$i<3;$i++)
{
	echo "<br>".$arr[$i];
}
foreach($arr as $x => $x_value) {
    echo "<br>"."Key=" . $x . ", Value=" . $x_value;
}
//------------------------------------
$arr["name"]="DP";
echo "<br>".$arr["name"];
//--------------------------------------

$numbers = array(4, 6, 2, 22, 11);
$numbers[0]=1;
$numbers[5]=9;
echo $numbers[0];
echo $numbers[5];

sort($numbers);
$arrlength = count($numbers);
echo "<br>";
for($x = 0; $x < $arrlength; $x++)
{
    echo $numbers[$x];
    echo "<br>";
}

//----------------------------------------------------------------------------
$cars = array 			//TWO DIMENSIONAL ARRAY
  (
  array("Volvo",22,18),
  array("BMW",15,13),
  array("Audi",5,2),
  array("Land Rover",17,15)
  );

echo "<br>".$cars[0][0].": In stock: ".$cars[0][1].", sold: ".$cars[0][2];
echo "<br>".$cars[1][0].": In stock: ".$cars[1][1].", sold: ".$cars[1][2];
echo "<br>".$cars[2][0].": In stock: ".$cars[2][1].", sold: ".$cars[2][2];
echo "<br>".$cars[3][0].": In stock: ".$cars[3][1].", sold: ".$cars[3][2];

for($i=0;$i<3;$i++)
{
	echo "<br>";
	for($j=0;$j<3;$j++)
	{
		echo $cars[$i][$j];
	}
}
//---------------------------------------------------------------------------

$marks = array(
            "mohammad" => array (
               "physics" => 35,
               "maths" => 30,
               "chemistry" => 39
            ),

            "qadir" => array (
               "physics" => 30,
               "maths" => 32,
               "chemistry" => 29
            ),

            "zara" => array (
               "physics" => 31,
               "maths" => 22,
               "chemistry" => 39
            )
         );

         /* Accessing multi-dimensional array values */
         echo "<br>"."Marks for mohammad in physics : " ;
         echo $marks['mohammad']['physics'] . "<br />";

         echo "Marks for qadir in maths : ";
         echo $marks['qadir']['maths'] . "<br />";

         echo "Marks for zara in chemistry : " ;
         echo $marks['zara']['chemistry'] . "<br />";
//----------------------------------------------------------------------------------
$cars = array("Volvo", "BMW", "Toyota");
sort($cars);
//--------------------------------------------------------------------------------
$arr1=array("abc","def");
$arr2=array("ghi","jkl");
print_r(array_merge($arr1,$arr2));   //merging two arrays
echo "<br>";
$union=$arr1+$arr2;
//var_dump($union);  //Union
echo "<br>";
print_r($union);

echo "<br>";
$my_array1 = array("size" => "big", 2,3 ); //Associative Array Union and Merge
$my_array2 = array("a", "b", "size" => "medium",
                        "shape" => "circle", 4);
print_r(array_merge($my_array1, $my_array2));
echo "<br>";
$union2=$my_array1+$my_array2;
print_r($union2);

//------------------------------------------------------------------------------
//Array Slice
echo "<br>";
$a=array("red","green","blue","yellow","brown");
print_r(array_slice($a,2,3));
//------------------------------------------------------------------------------
echo "<br>";
$str = "Hello world. It's a beautiful day."; //Converting String to Array
print_r (explode(" ",$str));
//------------------------------------------------------------------------------
echo "<br>";
$arr = array('Hello','World!','Beautiful','Day!');//Converting Array to String
echo implode(" & ",$arr);//here " " is delimiter
//-----------------------------------------------------------------------------
echo "<br>";
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$result=array_flip($a1); //Swapping Array Keys and Value
print_r($result);
//----------------------------------------------------------------------------
echo "<br>";
$a=array("a"=>"red","b"=>"green","c"=>"red");
print_r(array_unique($a));//Removind Duplicacy in array elements
//echo join(" ,",$a);
//------------------------------------------------------------------------------------------
//WAPS to calculate and display 5 lowest and highest temperatures?
echo "<br>";
$temp=array(78,60,62,68,71,68,73,85,66,64,76,63,75,76,73,68,62,73,72,65,74,62,62,65,64,68,73,75,79,73);
$temp1=array_unique($temp);
sort($temp1);
echo "List of 5 lowest temperatures are ";
print_r(array_slice($temp1,0,5));
$temp2=array_reverse($temp1);
echo "<br>";
echo "List of 5 highest temperatures are ";
print_r(array_slice($temp2,0,5));
echo "<br>";
//----------------------------------------------------------------------------------------------------
function fun($b) //Function
{
    echo $b;
}
$a=10;
fun($a);
//--------------------------------------------------------------------------------------------------
function fun1($a,$b)
{
	$c=$a+$b;
	return $c;
}
echo "<br>Sum is ".fun1(5,10);
//---------------------------------------
echo "<br>";
function fun2($dividend,$divisor)
{
	$quotient=$dividend/$divisor;
	$array=array($dividend,$divisor,$quotient);
	return $array;
}
print_r(fun2(10,20));
//-------------------------------------------------------------------------
function factorial($number) //Factorial of a number using recursion
{
    if ($number < 2)
    {
        return 1;
    }
    return ($number * factorial($number-1));
}
echo "<br>Factorial is ".factorial(5);

function factorial1($num)
{
	$fact=1;
	for($i=$num;$i<0;$i--)
	{
		 $fact=$fact*$i;
	}
	return $fact;
}
echo factorial1(20);
//------------------------------------------------------------------
function fun3(&$a,&$b)
{
	$c=$a+$b;
	return $c;
}
$x=10;
$y=20;
echo "<br>Sum is ".fun3($x,$y);
//-----------------------------------
function setHeight($minheight=50)
{
    echo "<br>The height is : $minheight <br>";
}
setHeight(350);
setHeight();
setHeight(135);
setHeight(80);
//------------------------------------------------------------
function sayHello()
{
    echo "hello"."<br>";
}
$function_holder="sayhello";
$function_holder();
//--------------------------------------------------------------
echo "<br>";
function add(...$numbers)
{
    $sum=0;
    foreach($numbers as $n)
    {
        $sum +=$n;
    }
    return $sum;
}
echo add(1,2,3,4);
//--------------------------------------------------------
echo "<br>";
function even(...$numbers)
{
    $sum=0;
    foreach($numbers as $n)
    {
        if($n%2==0)
        {
            $sum +=$n;
        }
    }
    return $sum;
}
echo even(1,2,3,4);
//--------------------------------------------------------
echo "<br>";    //Local,Global,Static Variables
$a=20;
$x=10;
function ex()
{
    $x=5;
    global $a;
    static $s=30;
    $a++;
    $s++;
    $x++;
echo "<br>Global Variable ".$a;
echo "<br>Local Variable ".$x;
echo "<br>Static Variable ".$s."<br>";
}
ex();
ex();
ex();
ex();
echo $x;
// echo $s will give error because scope of static variable is inside the block only.
//--------------------------------------------------------------------------------------
<?php
print_r($_GET)
if(isset($_GET['name'],$_GET['Rollo'],$_GET['Age'],$_GET['Address']))
?>
-----------------------------------------------cookie-----------
<?php
$cookie_name="user";
$cookie_value="Juju Spices";
setcookie($cookie_name, $cookie_value, time() + (86400*30), "/");
?>

<html>
<body>
	<?php
		if(!isset($_COOKIE[$cookie_name]))
		{
			echo "Cookie named " . $cookie_name . " is not set!";
		}
		else
		{
			echo "Cookie " . $cookie_name . " is set!<br>";
			echo "Value is: " . $_COOKIE[$cookie_name];
		}
		?>
	</body>
</html>
------------------------------------session-------------------
<?php
session_start();
?>
<!DOCTYPE html>
<html>
<body>
<?php
$_SESSION["favcolor"] = "green";
$_SESSION["favanimal"] = "cat";

echo "Session variables are set.";
?>
</body>
</html>
----------------------------------------------------------------------------------
<?php
session_start();
?>
<!DOCTYPE html>
<html>
<body>

<?php
// Echo session variables that were set on previous page
echo "Favorite color is " . $_SESSION["favcolor"] . ".<br>";
echo "Favorite animal is " . $_SESSION["favanimal"] . ".";
?>

</body>
</html>
------------------------------------------------------------------------------------------
<?php
session_start();
?>
<!DOCTYPE html>
<html>
<body>

<?php
print_r($_SESSION);
?>

</body>
</html>
---------------------------------------Sanitization------------------------------
<?php
print_r(filter_list());
if(isset($_POST['submit']));
$a=	$_POST['name'];
if(empty($a))
{
	echo "Name Not found";
}
else
{
	$a=filter_var($a,FILTER_SANITIZE_STRING);
	echo "<br>";
	echo $a."==is Sanitized.<br>";
	if(!preg_match("/^[a-zA-Z]+$/",$a))
	{
		echo "Name Invalid<br>";
	}
	else
	{
		echo "Valid Named<br>";
	}

}
$b=$_POST['Roll'];

$c=$_POST['Age'];
$d=$_POST['Address'];
echo "Name is {$a},Roll  is {$b},Age is {$c},Address is {$d}";

?>

<form action="get.php" method="POST">
	<input type="text" name="name" placeholder="Name" required="name">
	<input type="text" name="Roll" placeholder="roll">
	<input type="text" name="Age" placeholder="age">
	<input type="text" name="Address" placeholder="add">
	<input type="Submit">
</form>
----------------------------------------------------------------form validation---------------------
<?php
$a=$_GET["name"];
if(empty($a))
{
	echo 'name not found';
}
else
{
	if(!preg_match("/^[a-zA-Z]*$/",$a))
	{
		echo "only letters are allowed<br>";
	}
	else
	{
		echo $a."<br>";
	}
}
$b=$_GET["email"];
if(empty($b))
{
	echo 'email not found<br>';
}
else
{
	if(!filter_var($b,FILTER_VALIDATE_EMAIL))
	{
		echo "invalid email<br>";
	}
	else
	{
		echo $b."<br>";
	}
}
$c=$_GET["number"];
if(empty($c))
{
	echo 'number not found<br>';
}
else
{

	if(!preg_match("/^[0-9]{10}+$/",$c))
	{
		echo "only numbers are allowed<br>";
	}
	else
	{
		echo $c;
	}
}
?>
------------------------------------------------------database query------------------------
<?php
$username ="root";
$password = "";
$hostname ="localhost";;

//connetion to the database
$dbhandle =mysql_connect($hostname, $username, $password)
	or die("Unable to connect to mySql");
echo"Connected to MySQL<br>";
// select a database to work with
$selected = mysql_select_db("examples",$dbhandle)
or die("Could not select examples");

//execute the SQL query and return records
$result = mysql_query("SELECT id, model, year FROM cars");

//fetch the data from the database
while($row =mysql_fetch_array($result))
{
	echo "ID:".$row{'id'}."Name:".$row{'model'}."year:".$row{'year'}."<br>";
}
//close the connection
mysql_close($dbhandle);
?>
---------------------------------------------------------------create database------------
<?php
$hostname = "localhost";
$username = "root";
$password = "";


// Create connection
$conn = new mysqli($hostname, $username, $password);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Create database
$sql = "CREATE DATABASE myDB1";
if ($conn->query($sql)== TRUE) {
    echo "Database created successfully";
} else {
    echo "Error creating database: " . $conn->error;
}

$conn->close();
?>
-------------------------create table--------------------
 sql to create table
$sql = "CREATE TABLE employee (
emp_id INT(1) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
emp_name VARCHAR(30) NOT NULL,
emp_dept VARCHAR(30) NOT NULL,
salary INT(6)
)";
-----------------------------------data insert
<?php
$hostname = "localhost";
$username = "root";
$password = "";
$dbname = "mydb";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "INSERT INTO employee (emp_id,emp_name,emp_dept,salary)
VALUES (1,'a','CSE',40000);";
$sql = "INSERT INTO employee (emp_id,emp_name,emp_dept,salary)
VALUES (2,'b','IT',30000);";
$sql = "INSERT INTO employee (emp_id,emp_name,emp_dept,salary)
VALUES (3,'c','EEE',45000);";
$sql = "INSERT INTO employee (emp_id,emp_name,emp_dept,salary)
VALUES (4,'d','ECE',50000);";
$sql = "INSERT INTO employee (emp_id,emp_name,emp_dept,salary)
VALUES (5,'e','CSE',55000);";



if ($conn->multi_query($sql) === TRUE) {
    echo "New records created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();
?>
----------------------------------------------------post method-----------

<?php


if(isset($_POST["Submit"]))
{
	extract($_POST);

$a=	$_POST["name"];
$b=$_POST['roll'];
$c=$_POST['class'];
if(empty($name)){
echo "value is NOT there";
}
else
{
	echo $a;
}
}

?>

<form  action="post.php" method="post">
	name<input type="text" name="name" placeholder="">
	rollo<input type="text" name="roll" placeholder="">
	class<input type="text" name="class" placeholder="">

	<input type="Submit">
</form>

------------------------------------db.php-----------
<?php
$g=mysqli_connect('localhost','root','','hd1');
if($g==false)
{
	echo "connection is not done";
}
else
{
	echo "connection is done";
}

if(isset($_POST["submit"]))
{
	extract($_POST);

$a=$_POST["first_name"];
$b=$_POST['last_name'];
$c=$_POST['reg_no'];
$d=$_POST['password'];
$sql="INSERT INTO mytable(first_name,last_name,reg_no,password) VALUES ('$a', '$b', '$c','$d')";

if(mysqli_query($g,$sql))
{
	echo "data insert";
}
else{
	echo "data not insert";
}
}


?>
<form  action="db.php" method="post"><br>
	first_name<input type="text" name="first_name" placeholder=""><br>
	last_name<input type="text" name="last_name" placeholder=""><br>
	reg_no<input type="text" name="reg_no" placeholder=""><br>
	password<input type="password" name="password" placeholder=""><br>
	<input type="submit" name="submit">

---------------------------------------------------------login.php-----------
<?php
$connect=mysqli_connect("localhost","root","" ,"hd1");

if($connect->connect_error)
{
   die("connection failed:" . $connect->connect_error);
}
echo "Connnection success";


if(isset($_POST['login'])){
	$first_name=$_POST['first_name'];
	$password=$_POST['password'];
	$query="select * from mytable where first_name='$first_name' and password='$password'";
	$result=mysqli_query($connect,$query);
	if(mysqli_num_rows($result)>0)
	{
		echo "Login ";

   }
	else
    {
        echo "<script>alert('error login')</script>";
    }
    }

 ?>

 <form method="POST" action="login.php">
    <input type="text" name="first_name" placeholder="first_name" required/>
    <input type="password" name="password" placeholder="password" required/>
    <button name="login" type="submit">Login</button>
</form>
-----------------------------------------------email sent----------
<?php
include('C:/xamppp/htdocs/phpclass/PHPMailerAutoload.php');
include('C:/xamppp/htdocs/phpclass/class.smtp.php');
$mail= new PHPMailer();
$mail->isSMTP();
$mail->SMTPAuth= true;
$mail->SMTPSecure='t1s'; //transport layer security protocol
$mail->Host = 'smtp.gmail.com';
$mail->Port = 587;
$mail->Username= 'sharmashikha0698@gmail.com';

$mail->Password = '';
$mail->Subject = 'hello';
$mail->Body = 'mail';
$mail->addAddress('sharmashikha0698@gmail.com');
$mail->Send();
if(!$mail->Send())
{
	echo "message not sent";
}
else
{
	echo "message  sent";

}
?>
-------------------------------------overriding---------
<?php
// The parent class has hello method that returns "beep".
class Car {
  public function hello()
  {
    echo "beep";
  }
}

//The child class has hello method that returns "Halllo"
class SportsCar extends Car {
  public function hello()
  {
    echo "Hallo";
	parent::hello();
  }
}

//Create a new object
$sportsCar1=new SportsCar();

//Get the result of the hello method
echo $sportsCar1 -> hello();
?>
-----------------------------session login------
<?php
session_start();
$message="";
if(count($_POST)>0) {
 $con = mysqli_connect('127.0.0.1:3306','root','','admin') or die('Unable To connect');
$result = mysqli_query($con,"SELECT * FROM login_user WHERE name='" . $_POST["name"] . "' and password = '". $_POST["password"]."'");
$row  = mysqli_fetch_array($result);
if(is_array($row)) {
$_SESSION["id"] = $row[id];
$_SESSION["name"] = $row[name];
} else {
$message = "Invalid Username or Password!";
}
}
if(isset($_SESSION["id"])) {
header("Location:index.php");
}
?>
<html>
<head>
<title>User Login</title>
</head>
<body>
<form name="frmUser" method="post" action="" align="center">
<div class="message"><?php if($message!="") { echo $message; } ?></div>
<h3 align="center">Enter Login Details</h3>
 Username:<br>
 <input type="text" name="name">
 <br>
 Password:<br>
<input type="password" name="password">
<br><br>
<input type="submit" name="submit" value="Submit">
<input type="reset">
</form>
</body>
</html>
-----------------------------------session index
<?php
session_start();
?>
<html>
<head>
<title>User Login</title>
</head>
<body>

<?php
if($_SESSION["name"]) {
?>
Welcome <?php echo $_SESSION["name"]; ?>. Click here to <a href="logout.php" tite="Logout">Logout.
<?php
}else echo "<h1>Please login first .</h1>";
?>
</body>
</html>
---------------------------session logout-----------
<?php
session_start();
unset($_SESSION["id"]);
unset($_SESSION["name"]);
header("Location:login.php");
?>
---------------------------------------------------cookie login
<?php
session_start();
if(isset($_COOKIE['username']) && isset($_COOKIE['password'])) {
	if($_COOKIE['username']=='abc' && $_COOKIE['password']=='123') {
		$_SESSION['username'] = $_COOKIE['username'];
		header('location:welcome.php');
	}
	else
		$error = "Account's Invalid";
}

if(isset($_POST['login'])){
	if($_POST['username']=='abc' && $_POST['password']=='123'){
		$_SESSION['username'] = $_POST['username'];
		if($_POST['remember'] != NULL) {
			setcookie('username', $_POST['username'], time() + (86400 * 30), "/");
			setcookie('password', $_POST['password'], time() + (86400 * 30), "/");
		}
		header('location:welcome.php');
	}
	else {
		$error = "Account's Invalid";
	}
}
?>
<form method="post">
	<fieldset>
		<legend>Login</legend>
		<?php echo isset($error) ? $error : ''; ?>
		<table cellpadding="2" cellspacing="2">
			<tr>
				<td>Username</td>
				<td><input type="text" name="username"></td>
			</tr>
			<tr>
				<td>Password</td>
				<td><input type="password" name="password"></td>
			</tr>
			<tr>
				<td>Remember Me</td>
				<td><input type="checkbox" name="remember"></td>
			</tr>
			<tr>
				<td>&nbsp;</td>
				<td><input type="submit" name="login" value="Login"></td>
			</tr>
		</table>
	</fieldset>
</form>
-----------------------------------------------------------------Welcome Page
<?php
session_start();
if(isset($_GET['action']) && $_GET['action']=='logout'){
	// Remoce session
	unset($_SESSION['username']);
	// Remoce cookie
	setcookie('username', '', 0, "/");
	setcookie('password', '', 0, "/");
	header('location:index.php');
}
echo 'Welcome '.$_SESSION['username'];
?>
<br>
<a href="welcome.php?action=logout">Logout</a>