session.auto_start: By using this config setting file we can start the sessions when the request is started. session.save_handler: To specify the handler where you want to store the sessions we can [ … ]

<?php session_start();if(isset($_SESSION[‘valid’])){echo “<script> location=’Welcome.php’ </script>”;}else session_destroy();if(isset($_POST[‘sub’])){$uname=$_POST[‘uname’];$pwd=$_POST[‘pwd’];if($uname==”Webnoid” and $pwd= “School”){session_start();$_SESSION[‘valid’]=true;$_SESSION[‘uname’]=$uname;echo “<script> location=’Welcome.php'</script>”;}else{echo “Invalid”;}?><form method=”post”  action=” “>username: <input type=”text name=”uname”>password: <input type=”password” name=”pwd”>                    [ … ]

Session is a state management object using to access values of one page from another page. Session can store information in web server by using $_SESSION we can create the [ … ]

Find out date and time when COOKIE is downloading in client system. Add lifetime to current date and time to get expiry time. To create Cookie client system with resultant [ … ]

Cookie is some text information in client system used to maintain the state of application the data of cookie we can access from any location in the server. Cookie is [ … ]

Protocols are set of instructions transfer the data from one page to another page. Protocols are mainly divided into two types. they are, 1) State full protocol: 2) State less [ … ]

file_uploads: This is used to allow and stop file uploading. upload_tmp_dir: This is used to specify a temporary directory location of uploadable files. upload_max_filesize: This is used to specify the maximum [ … ]

It is a common MIME tag can upload any type of file. is_upload_file:  By using this function we can check whether file is uploaded from browser temporary memory location to [ … ]

MIME stands for Multipurpose Internet Mailing Extension. It is a type extension used to upload files from browser to server form tag contains ‘enctype’ attribute. By using this we can specify [ … ]

$_FILE: By using this super global variable we can get the information of uploaded files. It is two dimensional array variable contains five elements. Each element’s first dimension is name [ … ]