Upload Image In PHP

Create a folder name image
and run this script
< ? php
//define a maxim size for image
define ("MAX_SIZE","100");

//This function reads the extension of the file. It is used to determine if the file is an image by checking the extension.
function getExtension($str) {
$i = strrpos($str,".");
if (!$i) { return ""; }
$l = strlen($str) - $i;
$ext = substr($str,$i+1,$l);
return $ext;
}

//This variable is used as a flag. The value is initialized with 0 (meaning no error found)
//and it will be changed to 1 if an errro occures.
//If the error occures the file will not be uploaded.
$errors=0;
//checks if the form has been submitted
if(isset($_POST['Submit']))
{
//reads the name of the file the user submitted for uploading
$image=$_FILES['image']['name'];
$folder=$_POST['folder'];
//if it is not empty
if ($image)
{
//get the original name of the file from the clients machine
$filename = stripslashes($_FILES['image']['name']);
//get the extension of the file in a lower case format
$extension = getExtension($filename);
$extension = strtolower($extension);
//if it is not a known extension, we will suppose it is an error and will not upload the file,
//otherwise we will do more tests
if (($extension != "jpg") && ($extension != "jpeg") && ($extension != "png") && ($extension != "gif"))
{
//print error message
echo 'Unknown extension!';
$errors=1;
}
else
{
//get the size of the image in bytes
//$_FILES['image']['tmp_name'] is the temporary filename of the file
//in which the uploaded file was stored on the server
$size=filesize($_FILES['image']['tmp_name']);

//compare the size with the maxim size we defined and print error if bigger
if ($size > MAX_SIZE*1024)
{
echo 'You have exceeded the size limit!';
$errors=1;
}

//we will give an unique name, for example the time in unix time format
$image_name=time().'.'.$extension;
//the new name will be containing the full path where will be stored (images folder)
$newname="image/".$image_name;
//we verify if the image has been uploaded, and print error instead
$copied = copy($_FILES['image']['tmp_name'], $newname);
if (!$copied)
{
echo 'Upload !';
$errors=1;
}}}}

//If no errors registred, print the success message
if(isset($_POST['Submit']) && !$errors)
{
echo "File Uploaded Successfully! Try again!";
}

?>

email in php

< ? php
$to = "recipient@example.com";
$subject = "Your Message Subject";
$body = "Message";
if (mail($to, $subject, $body)) {
echo("

Message sent successfully

");
} else {
echo("

Failed

");
}
?>

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Steganography

Steganography is the art of hiding information.

Auto Logout in php

Copy and paste this code on youre page
you can change time as your need i take 60 sec .
< ? php
session_start();

// set timeout period in seconds
$inactive = 60;

// check to see if $_SESSION['timeout'] is set
if(isset($_SESSION['timeout']) ) {
$session_life = time() - $_SESSION['timeout'];
if($session_life > $inactive)
{
// go to login page when idle
session_destroy(); header("Location: logout.php");
}
}?>

Login denied

If a user not login and try to open page

< ? php
session_start();

if (!$_SESSION["userid"])
{
// User not logged in, redirect to login page
header("location: index.php");
}
?>

Copy and paste above code on every page of your webapplication :)

How To Do A 404 Redirect With Php?

For this problem we need two file one file .htaccess and one php file i used 404.php you can use any other name.

first Make a .htaccess file

open notepad and paste below code and save as .htaccess page

ErrorDocument 404 http://www/yourdomain/404.php

and 2nd php file

< ? php

echo"page is not found";

?>

You can wrtie anything(use image etc) in php page

now type anypage name which not is your website it will return on 404.php page.