PHP Presentation

PHP INSTALLATION & SAMPLES -BY H. ANKUSH. JAIN

WHAT IS PHP? Hypertext Preprocessor widely used, general-purpose scripting language a server side scripting language used on the Internet to create dynamic web pages.

Install PHP 5 on Windows 1- Download the latest Windows PHP Binaries (MSI file)

2- Right click on the file and click “Install“.

3- Click “Next ” once the Welcome page is displayed.

4- Select “I accept the license agreement” and click “Next “.

5- Change your PHP installation path OR just accept the default path - C:\Program Files\PHP\ and click “Next

6- On the Web Server Setup screen, select the Apache 2.2.x Module and click “Next

7-On the Apache Configuration Directory screen, browse for the Apache configuration directory (conf) OR just enter C:\Program Files\Apache Software Foundation\Apache2.2\conf\ and click “Next ” to proceed with the installation. select-apache-webserver-configuration-directory

8- For now, accept the default selection and click “Next”.

9-Click “Install ” to install PHP 5 on Windows.

10- Click “Finish ” once completed. PHP 5 is successfully installed.

11- Start your Apache 2.2 server using the “Monitor Apache Servers” console (Start -> Apache HTTP Servers 2.2.4 -> Monitor Apache Servers ). You can see that PHP was successfully installed by checking the Apache status at the bottom of the console.

1- Open up your Windows Notepad. Type in “<?php phpinfo(); ?>” inside the file. Save this file as “info.php” inside your Apache root directory, C:\Program Files\Apache Software Foundation\Apache2.2\htdocs .

2- Open up your web browser . In the address bar, type in your web server domain name plus info.php as the file name. Example: http://www.syahid.com/info.php . You should get a PHP configuration page just like the one below.

Congratulations! You have successfully installed and test PHP 5 on Windows!

Sample 1: current date in an HTML page <html> <head> <title>Example #1 TDavid's Very First PHP Script ever!</title> </head> <? print(Date("l F d, Y")); ?> <body> </body> </html>

2.current month/day/date format <html> <head> <title>Example #3 TDavid's Very First PHP Script ever!</title> </head> <? print(Date("m/j/y")); ?> <body> </body> </html>

3. current month/day/date with HTML colors & formatting <html> <head> <title>PHP Script examples!</title> </head> <font face="Arial" color="#FF00FF"><strong><? print(Date("m/j/y")); ?> </strong></font> <body> </body> </html>

4. change background color based on day of the week using if else elseif statements <html> <head> <title>Background Colors change based on the day of the week</title> </head> <? $today = date("l"); print("$today"); if($today == "Sunday") { $bgcolor = "#FEF0C5"; }

4. change background color based on day of the week using if else elseif statements elseif($today == "Monday") { $bgcolor = "#FFFFFF"; } elseif($today == "Tuesday") { $bgcolor = "#FBFFC4"; } elseif($today == "Wednesday") { $bgcolor = "#FFE0DD"; } elseif($today == "Thursday"){ $bgcolor = "#E6EDFF";}

4. change background color based on day of the week using if else elseif statements elseif($today == "Friday") { $bgcolor = "#E9FFE6"; } else { // Since it is not any of the days above it must be Saturday $bgcolor = "#F0F4F1"; } print("<body bgcolor=\"$bgcolor\">\n"); ?> <br>This just changes the color of the screen based on the day of the week </body> </html>

4. change background color based on day of the week using array <html> <head> <title>Background Colors change based on the day of the week</title></head> <?$today = date("w"); $bgcolor = array( "#FEF0C5", "#FFFFFF", "#FBFFC4", "#FFE0DD", "#E6EDFF", "#E9FFE6", "#F0F4F1" ); ?> <body bgcolor="<?print("$bgcolor[$today]");?>"> <br>This just changes the color of the screen based on the day of the week </body> </html>

5. add date time stamp "page last updated on.." using filemtime function using forms, cookies, flat file databases, random number generation <html> <head> <title>Page last updated on month/date/year hour:min PHP Script</title> </head> <? $last_modified = filemtime("example7.php3"); print("Last Modified "); print(date("m/j/y h:i", $last_modified)); ?> </body> </html>

6. setting and retrieving a cookie <? $check = "test"; $check .= $filename; if ($test == $check) {print("<HTML><BODY>You have already voted. Thank you.</BODY></HTML>"); } else{ $rated = "test"; $rated .= $filename; setcookie(test, $rated, time()+86400); print("<HTML><BODY><br>You haven't voted before so I recorded your vote</BODY></HTML>"); } ?>

7. getting an average number using PHP <? $total_ratings = (3+2+3+1+5+2+3); $total_votes = 7; $average = $total_ratings / $total_votes; print("The Average Rating Is: $average"); ?>

8. showing the surfer average vote statistics, using printf function <? $path = "/YOUR/PATH/TO/public_html/php_diary/data"; $filename = "122499.dat"; $x= -1; if($file = fopen("$path/$filename", "r")) { while(!feof($file)) { $therate = fgetss($file, 255); $x++; $count = $count + $therate; } fclose($file); } $average = ($count / $x); print("Surfer Average Rating for 12/24/99: "); printf("%.2f", $average); print("<br>Total Surfer Votes: $x"); ?>

9. generating a rand number from 0 to 9 <? srand(time()); $random = (rand()%9); print("Random number between 0 and 9 is: $random"); ?>

10. php simple slot machine - multiple rand number generation <? function slotnumber() { srand(time()); for ($i=0; $i < 3; $i++) { $random = (rand()%3); $slot[] = $random; } print("<td width=\"33%\"><center>$slot[0]</td>"); print("<td width=\"33%\"><center>$slot[1]</td>"); print("<td width=\"33%\"><center>$slot[2]</td>"); </tr>

11. php simple slot machine - multiple rand number generation <tr> <td width="100%" colspan="3" bgcolor="#008080"><form method="POST" action="example13.php3"><div align="center"><center><p><input type="submit" value="Spin!"></p> </center></div> </form> </td> </tr> </table> </center></div>

12. random text link advertising using predefined arrays mail, regular expressions, password protection <? $random_url = array("http://www.tdscripts.com/linkorg.html", "http://www.tdscripts.com/keno.html", "http://www.tdscripts.com/ezibill.shtml", "http://www.tdscripts.com/tdforum.shtml", "http://www.tdscripts.com/picofday.html", "http://www.tdscripts.com/gutsorglory.html");

random text link advertising using predefined arrays mail, regular expressions, password protection $url_title = array("Link Organizer", "TD Keno", "eziBill *Free Promotion!", "TD Forum", "TD Pic of Day PHP", "Guts or Glory Poker PHP"); $url_desc = array("- A comprehensive link list organizer", "- Offer your site visitors an engaging Keno game without the monetary risk", "- Sell access to and protect your membership area using iBill and our eziBill script", "- An unthreaded messageboard script to exchange ideas with your site visitors", "- Run your own picture of the day script from any site anywhere with this handy script", "- A casino-style card game written entirely in PHP");

random text link advertising using predefined arrays mail, regular expressions, password protection srand(time()); $sizeof = count($random_url); $random = (rand()%$sizeof); print("<center><a href=\"$random_url[$random]\">$url_title[$random]</a> $url_desc[$random]</center>"); ?>

13. forcing the text in a string to be all upper or lowercase <? // force all uppercase print(strtoupper("i bet this will show up as all letters capitalized<br>")); // force all lowercase print(strtolower("I BET THIS WILL SHOW UP AS ALL LETTERS IN LOWERCASE<br>")); // force the first letter of a string to be capitalized print(ucfirst("i bet this will show the first letter of the string capitalized<br>")); // force the first letter of each WORD in a string to be capitalized print(ucwords("i bet this will show the first letter of every word capitalized<br>")); ?>

14. searching through meta tags for a search engine <HTML> <BODY> <? $all_meta = get_meta_tags("010600.php3"); print($all_meta["description"]); print("<br>"); print($all_meta["keywords"]); ?> </BODY> </HTML>

15. searching through a directory and picking out files using a regular expression <? $diary_directory = opendir("."); while($filename = readdir($diary_directory)) { $filesplit = explode(".", $filename); $check_filename = $filesplit[0]; if(ereg("[0-9]{6}", $check_filename)) { $check_filename .= ".$filesplit[1]"; $valid_filename[] = $check_filename; } } closedir($diary_directory); for($index = 0; $index < count($valid_filename); $index++) { print("$valid_filename[$index]<br>"); } ?>

16. shuffling and "cutting" a deck of playing cards <? $cards = array("ah", "ac", "ad", "as", "2h", "2c", "2d", "2s", "3h", "3c", "3d", "3s", "4h", "4c", "4d", "4s", "5h", "5c", "5d", "5s", "6h", "6c", "6d", "6s", "7h", "7c", "7d", "7s", "8h", "8c", "8d", "8s", "9h", "9c", "9d", "9s", "th", "tc", "td", "ts", "jh", "jc", "jd", "js", "qh", "qc", "qd", "qs", "kh", "kc", "kd", "ks");

shuffling and "cutting" a deck of playing cards srand(time()); for($i = 0; $i < 52; $i++) { $count = count($cards); $random = (rand()%$count); if($cards[$random] == "") { $i--; } else { $deck[] = $cards[$random]; $cards[$random] = ""; } }

shuffling and "cutting" a deck of playing cards srand(time()); $starting_point = (rand()%51); print("Starting point for cut cards is: $starting_point<p>"); // display shuffled cards (EXAMPLE ONLY) for ($index = 0; $index < 52; $index++) { if ($starting_point == 52) { $starting_point = 0; } print("Uncut Point: <strong>$deck[$index]</strong> "); print("Starting Point: <strong>$deck[$starting_point]</strong><br>"); $starting_point++; } ?>

17. Reader rated most useful diary entries in descending order <HTML> <HEAD> <title>Reader Rated Most Useful Entries</title> </HEAD> <BODY> <table border="0" width="100%"> <tr> <td width="6%" bgcolor="#00FFFF"><p align="center"><small><font face="Verdana">Rank</font></small></td> <td width="7%" bgcolor="#00FFFF"><p align="center"><small><font face="Verdana">Rating</font></small></td>

Reader rated most useful diary entries in descending order <td width="11%" bgcolor="#00FFFF"><p align="center"><small><font face="Verdana">Diary Date</font></small></td> <td width="76%" bgcolor="#00FFFF"><p align="left"><small><font face="Verdana">Description of Diary Page</font></small> </td> <script language="php"> $db = "DATABASE NAME"; $admin = "MYSQL USER NAME"; $adpass = "MYSQL PASSWORD"; $mysql_link = mysql_connect("localhost", $admin, $adpass); mysql_select_db($db, $mysql_link);

Reader rated most useful diary entries in descending order $query = "SELECT * FROM avg_tally ORDER BY average DESC"; $result = mysql_query($query, $mysql_link); if(mysql_num_rows($result)) { $rank = 1; while($row = mysql_fetch_row($result)) { print("</tr><tr>"); if($color == "#D8DBFE") { $color = "#A6ACFD"; } else { $color = "#D8DBFE"; } print("<td width=\"6%\" bgcolor=\"$color\"><center><small>"); print("<font face=\"Verdana\">$rank</font></small></center></td>"); print("<td width=\"7%\" bgcolor=\"$color\"><center><small>"); print("<font face=\"Verdana\"><strong>$row[1]</strong></font></small></center></td>"); print("<td width=\"11%\" bgcolor=\"$color\"><center><small>"); $url = $row[2] . ".php3";

Reader rated most useful diary entries in descending order if(!file_exists($url)) { $url = $row[2] . ".html"; } print("<font face=\"Verdana\"><a href=\"$url\">$row[2]</a></font></small></center></td>"); print("<td width=\"76%\" bgcolor=\"$color\"><left><small>"); print("<font face=\"Verdana\">$row[3]</font></small></left></td>"); $rank++; } } </script> </table> </BODY> </HTML>

18. creating a mySQL table using a PHP script <? $mysql_db = "DATABASE NAME"; $mysql_user = "YOUR MYSQL USERNAME"; $mysql_pass = "YOUR MYSQL PASSWORD"; $mysql_link = mysql_connect("localhost", $mysql_user, $mysql_pass); mysql_select_db($mysql_db, $mysql_link); $create_query = "CREATE TABLE tds_counter ( COUNT_ID INT NOT NULL AUTO_INCREMENT, pagepath VARCHAR(250), impressions INT, reset_counter DATETIME, PRIMARY KEY (COUNT_ID) )";

19. creating a mySQL table using a PHP script mysql_query($create_query, $mysql_link); print("Table Creation for <b>tds_counter</b> successful!<p>"); $insert = "INSERT into tds_counter VALUES ( 0, '/php_diary/021901.php3', 0, SYSDATE() )"; mysql_query($insert, $mysql_link); print("Inserted new counter successfully for this page: http://www.php-scripts.com/php_diary/021901.php3<p>"); ?>

20. mySQL based counter script for multiple pagesAutomating manual tasks, date sorting, mktime() <? $db = "DATABASE NAME"; $admin = "MYSQL USER NAME"; $adpass = "MYSQL PASSWORD"; $mysql_link = mysql_connect("localhost", $admin, $adpass); mysql_select_db($db, $mysql_link); $result = mysql_query("SELECT impressions from tds_counter where COUNT_ID='$cid'", $mysql_link); if(mysql_num_rows($result)) { mysql_query("UPDATE tds_counter set impressions=impressions+1 where COUNT_ID='$cid'", $mysql_link); $row = mysql_fetch_row($result); if($inv != 1) { print("$row[0]"); } }?>

21. Classify Email as Bounce (DSN) or Automated Reply <?php $bounce = new COM("Chilkat.Bounce"); $success = $bounce->UnlockComponent('Anything for 30-day trial'); if ($success == false) { print 'Failed to unlock component' . "\n"; exit; } $email = new COM("Chilkat.Email");

21. Classify Email as Bounce (DSN) or Automated Reply // Load an email from a .eml file. // (This example loads an Email object from a .eml file, // but the object could have been read // directly from a POP3 or IMAP mail server using // Chilkat's POP3 or IMAP implementations.) $success = $email->LoadEml('sampleBounce.eml'); if ($success == false) { print $email->lastErrorText() . "\n"; exit; }

21. Classify Email as Bounce (DSN) or Automated Reply $success = $bounce->ExamineMail($email); if ($success == false) { print $bounce->lastErrorText() . "\n"; exit; } if ($bounce->BounceType == 1) { // Hard bounce, log the email address print 'Hard Bounce: ' . $bounce->bounceAddress() . "\n"; } if ($bounce->BounceType == 2) { // Soft bounce, log the email address print 'Soft Bounce: ' . $bounce->bounceAddress() . "\n"; }

21. Classify Email as Bounce (DSN) or Automated Reply if ($bounce->BounceType == 3) { // General bounce, no email address available. print 'General Bounce: No email address' . "\n"; } if ($bounce->BounceType == 4) { // General bounce, log the email address print 'General Bounce: ' . $bounce->bounceAddress() . "\n"; } if ($bounce->BounceType == 5) { // Mail blocked, log the email address print 'Mail Blocked: ' . $bounce->bounceAddress() . "\n"; }

21. Classify Email as Bounce (DSN) or Automated Reply if ($bounce->BounceType == 6) { // Auto-reply, log the email address print 'Auto-Reply: ' . $bounce->bounceAddress() . "\n"; } if ($bounce->BounceType == 7) { // Transient (recoverable) Failure, log the email address print 'Transient Failure: ' . $bounce->bounceAddress() . "\n"; } if ($bounce->BounceType == 8) { // Subscribe request, log the email address print 'Subscribe Request: ' . $bounce->bounceAddress() . "\n"; } if ($bounce->BounceType == 9) { // Unsubscribe Request, log the email address print 'Unsubscribe Request: ' . $bounce->bounceAddress() . "\n"; }

21. Classify Email as Bounce (DSN) or Automated Reply if ($bounce->BounceType == 10) { // Virus Notification, log the email address print 'Virus Notification: ' . $bounce->bounceAddress() . "\n"; } if ($bounce->BounceType == 11) { // Suspected bounce. // This should be rare. It indicates that the Bounce // component found strong evidence that this is a bounced // email, but couldn//t quite recognize everything it // needed to be 100% sure. Feel free to notify // support@chilkatsoft.com regarding emails having this // bounce type. print 'Suspected Bounce!' . "\n";} ?>

22. program to print a message <html> <h3>My first PHP Program</h3> <? echo "Hello world!"; ?> </html>

23. PHP Array <?php $employee_names[0] = "Dana"; $employee_names[1] = "Matt"; $employee_names[2] = "Susan"; echo "The first employee's name is ".$employee_names[0]; echo "<br>"; echo "The second employee's name is ".$employee_names[1]; echo "<br>"; echo "The third employee's name is ".$employee_names[2]; ?>

24.File Upload Script <html> <head> <title>A File Upload Script</title> </head> <body> <div> <?php if ( isset( $_FILES['fupload'] ) ) { print "name: ". $_FILES['fupload']['name'] ."<br />"; print "size: ". $_FILES['fupload']['size'] ." bytes<br />"; print "temp name: ".$_FILES['fupload']['tmp_name'] ."<br />"; print "type: ". $_FILES['fupload']['type'] ."<br />"; print "error: ". $_FILES['fupload']['error'] ."<br />"; if ( $_FILES['fupload']['type'] == "image/gif" ) { $source = $_FILES['fupload']['tmp_name']; $target = "upload/".$_FILES['fupload']['name'];

24.File Upload Script move_uploaded_file( $source, $target );// or die ("Couldn't copy"); $size = getImageSize( $target ); $imgstr = "<p><img width=\"$size[0]\" height=\"$size[1]\" "; $imgstr .= "src=\"$target\" alt=\"uploaded image\" /></p>"; print $imgstr; } } ?> </div> <form enctype="multipart/form-data" action="<?php print $_SERVER['PHP_SELF']?>" method="post"> <p> <input type="hidden" name="MAX_FILE_SIZE" value="102400" /> <input type="file" name="fupload" /><br/> <input type="submit" value="upload!" /> </p> </form> </body> </html>

25.Simple File Upload Form <html> <head> <title>A Simple File Upload Form</title> </head> <body> <form enctype="multipart/form-data" action="<?print $_SERVER['PHP_SELF']?>" method="post"> <p> <input type="hidden" name="MAX_FILE_SIZE" value="102400" /> <input type="file" name="fupload" /><br/> <input type="submit" value="upload!" /> </p> </form> </body> </html>

26.Creating an HTML Form That Accepts Mail-Related Information <html> <head> <title>Simple Send Mail Form</title> </head><body> <h1>Mail Form</h1> <form name="form1" method="post" action="SimpleEmail.php"> <table> <tr><td><b>To</b></td><td><input type="text" name="mailto" size="35"></td></tr> <tr><td><b>Subject</b></td> <td><input type="text" name="mailsubject" size="35"></td></tr> <tr><td><b>Message</b></td> <td><textarea name="mailbody" cols="50" rows="7"></textarea></td> </tr> <tr><td colspan="2"> <input type="submit" name="Submit" value="Send"> </td></tr></table></form></body> </html>

26.Creating an HTML Form That Accepts Mail-Related Information <!-- SimpleEmail.php <?php if (empty ($mailto) ) { die ( "Recipient is blank! ") ; } if (empty ($mailsubject) ){ $mailsubject=" " ; } if (empty ($mailbody) ) { $mailbody=" " ; } $result = mail ($mailto, $mailsubject, $mailbody) ; if ($result) { echo "Email sent successfully!" ; }else{ echo "Email could not be sent." ; } ?>

27.React to Form action <HTML> <BODY> <FORM METHOD="POST" ACTION="GetFormValue.php"> <H2>Contact List</H2> <BR>Nickname: <BR><INPUT TYPE="TEXT" NAME="Nickname"> <BR> <BR>Full Name: <BR><INPUT TYPE="TEXT" NAME="Fullname">

27.React to Form action <BR> <BR>Memo: <BR><TEXTAREA NAME="Memo" ROWS="4" COLS="40" WRAP="PHYSICAL"> </TEXTAREA> <BR> <BR> <INPUT TYPE="SUBMIT"> </FORM> </BODY> <!-- GetFormValue.php <?php echo "<BR>Nickname=$Nickname"; echo "<BR>Fullname=$Fullname"; echo "<BR>Memo=$Memo"; ?>

28. Build query string based on form input <?php if (isset($_POST['submit'])) { $rowID = $_POST['id']; mysql_connect("mysql153.secureserver.net","java2s","password"); mysql_select_db("java2s"); $query = "SELECT * FROM Employee WHERE ID='$id'"; $result = mysql_query($query); list($name,$productid,$price,$description) = mysql_fetch_row($result); }

28. Build query string based on form input ?> <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post"> <select name="id"> <option name="">Choose a employee:</option> <option name="1">1</option> <option name="2">2</option> <option name="3">3</option> </select> <input type="submit" name="submit" value="Submit" /> </form>

29. Checking input from a checkbox or a multiple select <?php $options = array('option 1', 'option 2', 'option 3'); $valid = true; if (is_array($_GET['input'])) { $valid = true; foreach($_GET['input'] as $input) { if (!in_array($input, $options)) { $valid = false; } } if ($valid) { //process input } } ?>

30. Validating a single checkbox <?php $value = 'yes'; echo "<input type='checkbox' name='subscribe' value='yes'/> Subscribe?"; if (isset($_POST['subscribe'])) { if ($_POST['subscribe'] == $value) { $subscribed = true; } else { $subscribed = false;

30. Validating a single checkbox print 'Invalid checkbox value submitted.'; } } else { $subscribed = false; } if ($subscribed) { print 'You are subscribed.'; } else { print 'You are not subscribed'; }

31. Deal with Array Form Data <HTML> <BODY> <FORM METHOD="POST" ACTION="DealWithArrayFormData.php"> <H1>Contact Information</H1> <TABLE><TR> <TD>Childrens' Names:</TD> </TR> <TR> <TD><INPUT TYPE="TEXT" NAME="children[]"></TD> </TR> <TR> <TD><INPUT TYPE="TEXT" NAME="children[]"></TD> </TR> <TR> <TD><INPUT TYPE="TEXT" NAME="children[]"></TD> </TR>

31. Deal with Array Form Data <TR> <TD><INPUT TYPE="TEXT" NAME="children[]"></TD> </TR> <TR> <TD><INPUT TYPE="TEXT" NAME="children[]"></TD> </TR> </TABLE> <BR> <BR> <BR> <INPUT TYPE="SUBMIT" VALUE="Submit"> <BR> <BR> <INPUT TYPE="RESET" VALUE="Clear the Form"> </FORM> </BODY> </HTML>

31. Deal with Array Form Data

32. A process_form() Function <?php function process_form($data) { $msg = "The form at {$_SERVER['PHP_SELF']} was submitted with these values: \n\n"; foreach($data as $key=>$val) { $msg .= "$key => $val\n"; } mail("joeuser@somewhere.com", "form submission", $msg); } ?>

33. Access widget's form value <INPUT TYPE="text" NAME="myform.email"> would be accessed in PHP as the following: <?php echo $_GET['myform_email']; ?>

34. Accessing multiple submitted values <form method="POST" action="index.php"> <select name="lunch[]" multiple> <option value="a">A</option> <option value="b">B</option> <option value="c">C</option> <option value="d">D</option> <option value="e">E</option> </select> <input type="submit" name="submit"> </form> Selected buns: <br/><?php foreach ($_POST['lunch'] as $choice) { print "You want a $choice bun. <br/>"; } ?>

35. Forms and PHP //index.htm <html> <body> <form action="index.php" method="post"> Your Name:<br> <input type="text" name="name" size="20" maxlength="20" value=""><br> Your Email:<br> <input type="text" name="email" size="20" maxlength="40" value=""><br> <input type="submit" value="go!"> </form> </body> </html>

35. Forms and PHP //index.php <html> <head> <title></title> </head> <body> <? print "Hi, $name!. Your email address is $email"; ?> </body> </html>

36. Handling Special Characters <html> <body> <?php if ($_POST['submitted'] == "yes"){ $yourname = $_POST['yourname']; $yourname = trim ($yourname); $yourname = strip_tags ($yourname); $yourname = htmlspecialchars ($yourname); $yourname = addslashes ($yourname); echo $yourname . "<br />"; ?><a href="index.php">Try Again</a><?php }

36. Handling Special Characters if ($_POST['submitted'] != "yes"){ ?> <form action="index.php" method="post"> <p>Example:</p> <input type="hidden" name="submitted" value="yes" /> Your Name: <input type="text" name="yourname" maxlength="150" /><br /> <input type="submit" value="Submit" style="margin-top: 10px;" /> </form> <?php } ?> </div> </body> </html>

37. Saying "Hello" <? if (array_key_exists('my_name',$_POST)) { print "Hello, ". $_POST['my_name']; } else { print<<<_HTML_ <form method="post" action="$_SERVER[PHP_SELF]"> Your name: <input type="text" name="my_name"> <br/> <input type="submit" value="Say Hello"> </form> _HTML_; } ?>

38. An HTML Form That Calls Itself <html> <head> <title>An HTML Form that Calls Itself</title> </head><body> <div> <?php if ( ! empty( $_POST['guess'] ) ) { print "last guess: ".$_POST['guess']; }?> <form method="post" action="<?php print $_SERVER['PHP_SELF']?>"> <p> Type your guess here: <input type="text" name="guess" /> </p></form></div> </body> </html>

39. Form submitting <?php if (isset($_POST['submit'])){ echo "Hi ".$_POST['name']."!<br />"; echo "The address ".$_POST['email']." will soon be a spam-magnet!<br />"; } ?> <form action="index.php" method="post"> Name:<input type="text" name="name" size="20" maxlength="40" value="" /> Email Address: <input type="text" name="email" size="20" maxlength="40" value="" /> <input type="submit" name = "submit" value="Go!" /> </form>

40. One-script form processing //File: index.php <html> <head> <title></title> </head> <body> <? $form = "<form action=\"index.php\" method=\"post\"> <input type=\"hidden\" name=\"seenform\" value=\"y\"> <b>Give us some information!</b><br> Your Name:<br> <input type=\"text\" name=\"name\" size=\"20\" maxlength=\"20\" value=\"\"><br>

40. One-script form processing Your Email:<br> <input type=\"text\" name=\"email\" size=\"20\" maxlength=\"40\" value=\"\"><br> <input type=\"submit\" value=\"subscribe!\"> </form>"; if ($seenform != "y"): print "$form"; else : print "Hi, $name!. Your email address is $email"; endif; ?> </body> </html>

41. Preventing Multiple Submissions on the Client Side <html> <script language="javascript" type="text/javascript"> function checkandsubmit() { document.test.submitbut.disabled = true; document.test.submit(); } </script> <body> <form action="index.php" method="post" name="test" onsubmit="return checkandsubmit ()"> <input type="hidden" name="submitted" value="yes" /> Your Name: <input type="text" name="yourname" maxlength="150" />

41. Preventing Multiple Submissions on the Client Side <input type="submit" value="Submit" id="submitbut" name"submitbut" /></form> </body> </html> <?php if ($file = fopen ( "test.txt", "w+" )) { fwrite ( $file, "Processing" ); } else { echo "Error opening file."; } echo $_POST ['yourname']; ?>

42. Preventing Multiple Submissions on the Server Side <html> <body> <form action="index.php" method="post"> <input type="hidden" name="submitted" value="yes" /> Your Name: <input type="text" name="yourname" maxlength="150" /><br /> <input type="submit" value="Submit" style="margin-top: 10px;" /></form> </body> </html> <?php session_start (); if (! isset ( $_SESSION ['processing'] )) { $_SESSION ['processing'] = false;}

42. Preventing Multiple Submissions on the Server Side if ($_SESSION ['processing'] == false) { $_SESSION ['processing'] = true; //validation if ($file = fopen ( "test.txt", "w+" )) { fwrite ( $file, "Processing" ); } else { echo "Error opening file."; } echo $_POST ['yourname']; unset ( $_SESSION ['processing'] ); } ?>

43. Authenticate user: Database based <?php function authenticate_user() { header('WWW-Authenticate: Basic realm="Secret Stash"'); header("HTTP/1.0 401 Unauthorized"); exit; } if (! isset($_SERVER['PHP_AUTH_USER'])) { authenticate_user(); } else { mysql_pconnect("localhost","authenticator","secret") or die("Can't connect to database server!"); mysql_select_db("java2s") or die("Can't select authentication database!");

43. Authenticate user: Database based $query = "SELECT username, pswd FROM user WHERE username='$_SERVER[PHP_AUTH_USER]' AND pswd=MD5('$_SERVER[PHP_AUTH_PW]')"; $result = mysql_query($query); // If nothing was found, reprompt the user for the login information. if (mysql_num_rows($result) == 0) { authenticate_user(); } } ?>

44. Prompt Browser password dialog <?php if (($_SERVER['PHP_AUTH_USER'] != 'specialuser') || ($_SERVER['PHP_AUTH_PW'] != 'secretpassword')) { header('WWW-Authenticate: Basic Realm="Secret Stash"'); header('HTTP/1.0 401 Unauthorized'); print('You must provide the proper credentials!'); exit; } ?>

45. Open browser password dialog and authenticate user based on database <?php function authenticate_user() { header('WWW-Authenticate: Basic realm="Secret Stash"'); header("HTTP/1.0 401 Unauthorized"); exit; } if(! isset($_SERVER['PHP_AUTH_USER'])) { authenticate_user(); }

45. Open browser password dialog and authenticate user based on database else { mysql_connect("localhost","authenticator","secret") or die("Can't connect to database server!"); mysql_select_db("gilmorebook") or die("Can't select authentication database!"); $query = "SELECT username, pswd FROM user WHERE username='$_SERVER[PHP_AUTH_USER]' AND pswd=MD5('$_SERVER[PHP_AUTH_PW]') AND ipAddress='$_SERVER[REMOTE_ADDR]'"; $result = mysql_query($query); if (mysql_num_rows($result) == 0) authenticate_user(); mysql_close(); }?>

46. Login ID Options <HTML> <HEAD> <TITLE>Displaying Login ID Options</TITLE> </HEAD> <BODY> <Hl><CENTER>Generating Login IDs for Dave</CENTER></Hl> <?php $loginfo = array ( FirstName => "Joe", LastName => "Howrod", Sex => "Male", Location => "Arizona", Age => "24", MusicChoice => "Pop", Hobby => "Dance", Occupation => "Author"); echo "<H3>The information entered by JOe:<BR></H3>"; foreach ($loginfo as $key => $val) { echo "<B>$key</B> => $val<BR>"; }

46. Login ID Options echo "<BR> "; echo "<H3>The login options are:<BR></H3>"; $loginone = array_slice ($loginfo, 0, 2); $logintwo = array_slice ($loginfo, 3, 2); $loginthree = array_slice ($loginfo, 5, 2); $loginfour = array_slice ($loginfo, 6, 2); $loginfive = array_merge ($loginfour, "2001"); echo "The first login option:<BR>"; foreach ($loginone as $optionone) { echo "<B>$optionone</B>"; } echo "<BR>"; echo "The second login option:<BR>"; foreach ($loginone as $optiontwo) { echo "<B>$optiontwo</B>"; } echo "<BR>";

46. Login ID Optionsn echo "The third login option:<BR>"; foreach ($loginthree as $optionthree) { echo "<B>$optionthree</B>"; } echo "<BR>"; echo "The fourth login option:<BR>"; foreach ($loginfour as $optionfour) { echo "<B>$optionfour</B>"; } echo "<BR>"; echo "The fifth login option:<BR>"; foreach ($loginfive as $optionfive) { echo "<B>$optionfive</B>"; } echo "<BR>"; ?> </BODY> </HTML>

47. Get uniqid <? $id = uniqid("phpuser"); echo "$id"; ?>

48. Use md5 function to encrypt text <?php $val = "secret"; echo "Pre-hash string: $val <br />"; $hash_val = md5 ($val); echo "Hashed outcome: $hash_val"; ?>

49. md5 and uniqid <? $id = md5(uniqid(rand())); echo "$id"; ?>

50. A user registration process create table user_info ( user_id char(18), fname char(15), email char(35)); //File: index.php <? $form = " <form action=\"index.php\" method=\"post\"> <input type=\"hidden\" name=\"seenform\" value=\"y\"> Your first name?:<br> <input type=\"text\" name=\"fname\" value=\"\"><br> Your email?:<br> <input type=\"text\" name=\"email\" value=\"\"><br> <input type=\"submit\" value=\"Register!\"> </form> ";

50. A user registration process if ((! isset ($seenform)) && (! isset ($userid))) : print $form; elseif (isset ($seenform) && (! isset ($userid))) : $uniq_id = uniqid(rand()); @mysql_pconnect("localhost", "root", "") or die("Could not connect to MySQL server!"); @mysql_select_db("user") or die("Could not select user database!"); $query = "INSERT INTO user_info VALUES('$uniq_id', '$fname', '$email')"; $result = mysql_query($query) or die("Could not insert user information!"); setcookie ("userid", $uniq_id, time()+2592000); print "Congratulations $fname! You are now registered!.";

50. A user registration process elseif (isset($userid)) : @mysql_pconnect("localhost", "root", "") or die("Could not connect to MySQL server!"); @mysql_select_db("user") or die("Could not select user database!"); $query = "SELECT * FROM user_info WHERE user_id = '$userid'"; $result = mysql_query($query) or die("Could not extract user information!"); $row = mysql_fetch_array($result); print "Hi ".$row["fname"].",<br>"; print "Your email address is ".$row["email"]; endif; ?>

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