Php file upload, cookies & session
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This document covers PHP file uploads, cookies, and sessions. It includes demos of uploading files in PHP, setting and retrieving cookies, and using session variables to store and access user data across multiple pages. The topics discussed are: including one PHP file in another using include and require; uploading files with PHP; setting and retrieving cookie values; and storing and accessing data in PHP sessions using functions like session_start(), isset(), unset(), and session_destroy().
![Sessions
<?php
session_start();
// store session data
$_SESSION['visit'] = 1;
?>
<html>
<body>
<?php
//retrieve session data
echo "Pageviews=". $_SESSION['visit'];
?>
</body>
</html>](https://image.slidesharecdn.com/phpfileuploadcookiessession-130622030342-phpapp02/85/Php-file-upload-cookies-session-15-320.jpg)
Php file upload, cookies & session
- 1. PHP File Upload, Cookies & Session Jamshid Hashimi Trainer, Cresco Solution http://www.jamshidhashimi.com jamshid@netlinks.af @jamshidhashimi ajamshidhashimi Afghanistan Workforce Development Program
- 2. Agenda • Date • Include & Require • File Upload • Cookies • Sessions
- 3. Date • The PHP date() function is used to format a time and/or date. echo date("Y/m/d") . "<br>"; echo date("Y.m.d") . "<br>"; echo date("Y-m-d");
- 4. Date • The strftime function can format that timestamp in any way you’d like. You’ll pass it a format string and the timestamp and get the date back out. echo strftime("%B %d, %Y", time());
- 5. Date
- 6. Include & Require • In PHP, you can insert the content of one PHP file into another PHP file before the server executes it. – require will produce a fatal error (E_COMPILE_ERROR) and stop the script – include will only produce a warning (E_WARNING) and the script will continue
- 7. Include & Require include 'filename'; or require 'filename'; <div class="leftmenu"> <?php include 'menu.php'; ?> </div>
- 8. DEMO 1
- 9. PHP File Upload • With PHP, it is possible to upload files to the server. <!DOCTYPE html> <html> <body> <form action="upload.php" method="post" enctype="multipart/form-data"> <label for="file">Filename:</label> <input type="file" name="file" id="file"><br> <input type="submit" name="submit" value="Submit"> </form> </body> </html>
- 10. DEMO 2
- 11. Cookies • A cookie is often used to identify a user. A cookie is a small file that the server embeds on the user's computer. Each time the same computer requests a page with a browser, it will send the cookie too. With PHP, you can both create and retrieve cookie values. • I am not a big fan of cookies!
- 12. Cookies • We cannot trust data in $_COOKIES to contain legitimate values – Can easily modified! setcookie(name, value, expire, path, domain); setcookie("class", "AWD 01", time()+3600);
- 13. Session • A PHP session variable is used to store information about, or change settings for a user session. Session variables hold information about one single user, and are available to all pages in one application.
- 14. Sessions • php.ini – session.save_path • Maximum size of a PHP session – 128 M • session_start() • isset() • unset() • session_destroy()
- 15. Sessions <?php session_start(); // store session data $_SESSION['visit'] = 1; ?> <html> <body> <?php //retrieve session data echo "Pageviews=". $_SESSION['visit']; ?> </body> </html>
- 17. DEMO 3
- 18. QUESTIONS?
Editor's Notes
- #11: PHP File Upload