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Learn PHP installation and sample source codes

Learn PHP installation and sample source codes

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  • 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.
  • INSTALLATION
  • 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 FilesPHP 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 FilesApache Software FoundationApache2.2conf 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.
  • Test your PHP 5 Installation
  • 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 FilesApache Software FoundationApache2.2htdocs .
  • 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!
  • PHP SAMPLES
  • Sample 1: current date in an HTML page <html> <head> <title>Example #1 TDavid's Very First PHP Script ever!</title> </head> <? print(Date(&quot;l F d, Y&quot;)); ?> <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(&quot;m/j/y&quot;)); ?> <body> </body> </html>
  • 3. current month/day/date with HTML colors & formatting <html> <head> <title>PHP Script examples!</title> </head> <font face=&quot;Arial&quot; color=&quot;#FF00FF&quot;><strong><? print(Date(&quot;m/j/y&quot;)); ?> </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> <? $today = date(&quot;l&quot;); print(&quot;$today&quot;); if($today == &quot;Sunday&quot;) { $bgcolor = &quot;#FEF0C5&quot;; }
  • 4. change background color based on day of the week using if else elseif statements elseif($today == &quot;Monday&quot;) { $bgcolor = &quot;#FFFFFF&quot;; } elseif($today == &quot;Tuesday&quot;) { $bgcolor = &quot;#FBFFC4&quot;; } elseif($today == &quot;Wednesday&quot;) { $bgcolor = &quot;#FFE0DD&quot;; } elseif($today == &quot;Thursday&quot;){ $bgcolor = &quot;#E6EDFF&quot;;}
  • 4. change background color based on day of the week using if else elseif statements elseif($today == &quot;Friday&quot;) { $bgcolor = &quot;#E9FFE6&quot;; } else { // Since it is not any of the days above it must be Saturday $bgcolor = &quot;#F0F4F1&quot;; } print(&quot;<body bgcolor=&quot;$bgcolor&quot;> &quot;); ?> <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(&quot;w&quot;); $bgcolor = array( &quot;#FEF0C5&quot;, &quot;#FFFFFF&quot;, &quot;#FBFFC4&quot;, &quot;#FFE0DD&quot;, &quot;#E6EDFF&quot;, &quot;#E9FFE6&quot;, &quot;#F0F4F1&quot; ); ?> <body bgcolor=&quot;<?print(&quot;$bgcolor[$today]&quot;);?>&quot;> <br>This just changes the color of the screen based on the day of the week </body> </html>
  • 5. add date time stamp &quot;page last updated on..&quot; 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(&quot;example7.php3&quot;); print(&quot;Last Modified &quot;); print(date(&quot;m/j/y h:i&quot;, $last_modified)); ?> </body> </html>
  • 6. setting and retrieving a cookie <? $check = &quot;test&quot;; $check .= $filename; if ($test == $check) {print(&quot;<HTML><BODY>You have already voted. Thank you.</BODY></HTML>&quot;); } else{ $rated = &quot;test&quot;; $rated .= $filename; setcookie(test, $rated, time()+86400); print(&quot;<HTML><BODY><br>You haven't voted before so I recorded your vote</BODY></HTML>&quot;); } ?>
  • 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(&quot;The Average Rating Is: $average&quot;); ?>
  • 8. showing the surfer average vote statistics, using printf function <? $path = &quot;/YOUR/PATH/TO/public_html/php_diary/data&quot;; $filename = &quot;122499.dat&quot;; $x= -1; if($file = fopen(&quot;$path/$filename&quot;, &quot;r&quot;)) { while(!feof($file)) { $therate = fgetss($file, 255); $x++; $count = $count + $therate; } fclose($file); } $average = ($count / $x); print(&quot;Surfer Average Rating for 12/24/99: &quot;); printf(&quot;%.2f&quot;, $average); print(&quot;<br>Total Surfer Votes: $x&quot;); ?>
  • 9. generating a rand number from 0 to 9 <? srand(time()); $random = (rand()%9); print(&quot;Random number between 0 and 9 is: $random&quot;); ?>
  • 10. php simple slot machine - multiple rand number generation <? function slotnumber() { srand(time()); for ($i=0; $i < 3; $i++) { $random = (rand()%3); $slot[] = $random; } print(&quot;<td width=&quot;33%&quot;><center>$slot[0]</td>&quot;); print(&quot;<td width=&quot;33%&quot;><center>$slot[1]</td>&quot;); print(&quot;<td width=&quot;33%&quot;><center>$slot[2]</td>&quot;); </tr>
  • 11. php simple slot machine - multiple rand number generation <tr> <td width=&quot;100%&quot; colspan=&quot;3&quot; bgcolor=&quot;#008080&quot;><form method=&quot;POST&quot; action=&quot;example13.php3&quot;><div align=&quot;center&quot;><center><p><input type=&quot;submit&quot; value=&quot;Spin!&quot;></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(&quot;http://www.tdscripts.com/linkorg.html&quot;, &quot;http://www.tdscripts.com/keno.html&quot;, &quot;http://www.tdscripts.com/ezibill.shtml&quot;, &quot;http://www.tdscripts.com/tdforum.shtml&quot;, &quot;http://www.tdscripts.com/picofday.html&quot;, &quot;http://www.tdscripts.com/gutsorglory.html&quot;);
  • random text link advertising using predefined arrays mail, regular expressions, password protection $url_title = array(&quot;Link Organizer&quot;, &quot;TD Keno&quot;, &quot;eziBill *Free Promotion!&quot;, &quot;TD Forum&quot;, &quot;TD Pic of Day PHP&quot;, &quot;Guts or Glory Poker PHP&quot;); $url_desc = array(&quot;- A comprehensive link list organizer&quot;, &quot;- Offer your site visitors an engaging Keno game without the monetary risk&quot;, &quot;- Sell access to and protect your membership area using iBill and our eziBill script&quot;, &quot;- An unthreaded messageboard script to exchange ideas with your site visitors&quot;, &quot;- Run your own picture of the day script from any site anywhere with this handy script&quot;, &quot;- A casino-style card game written entirely in PHP&quot;);
  • random text link advertising using predefined arrays mail, regular expressions, password protection srand(time()); $sizeof = count($random_url); $random = (rand()%$sizeof); print(&quot;<center><a href=&quot;$random_url[$random]&quot;>$url_title[$random]</a> $url_desc[$random]</center>&quot;); ?>
  • 13. forcing the text in a string to be all upper or lowercase <? // force all uppercase print(strtoupper(&quot;i bet this will show up as all letters capitalized<br>&quot;)); // force all lowercase print(strtolower(&quot;I BET THIS WILL SHOW UP AS ALL LETTERS IN LOWERCASE<br>&quot;)); // force the first letter of a string to be capitalized print(ucfirst(&quot;i bet this will show the first letter of the string capitalized<br>&quot;)); // force the first letter of each WORD in a string to be capitalized print(ucwords(&quot;i bet this will show the first letter of every word capitalized<br>&quot;)); ?>
  • 14. searching through meta tags for a search engine <HTML> <BODY> <? $all_meta = get_meta_tags(&quot;010600.php3&quot;); print($all_meta[&quot;description&quot;]); print(&quot;<br>&quot;); print($all_meta[&quot;keywords&quot;]); ?> </BODY> </HTML>
  • 15. searching through a directory and picking out files using a regular expression <? $diary_directory = opendir(&quot;.&quot;); while($filename = readdir($diary_directory)) { $filesplit = explode(&quot;.&quot;, $filename); $check_filename = $filesplit[0]; if(ereg(&quot;[0-9]{6}&quot;, $check_filename)) { $check_filename .= &quot;.$filesplit[1]&quot;; $valid_filename[] = $check_filename; } } closedir($diary_directory); for($index = 0; $index < count($valid_filename); $index++) { print(&quot;$valid_filename[$index]<br>&quot;); } ?>
  • 16. shuffling and &quot;cutting&quot; a deck of playing cards <? $cards = array(&quot;ah&quot;, &quot;ac&quot;, &quot;ad&quot;, &quot;as&quot;, &quot;2h&quot;, &quot;2c&quot;, &quot;2d&quot;, &quot;2s&quot;, &quot;3h&quot;, &quot;3c&quot;, &quot;3d&quot;, &quot;3s&quot;, &quot;4h&quot;, &quot;4c&quot;, &quot;4d&quot;, &quot;4s&quot;, &quot;5h&quot;, &quot;5c&quot;, &quot;5d&quot;, &quot;5s&quot;, &quot;6h&quot;, &quot;6c&quot;, &quot;6d&quot;, &quot;6s&quot;, &quot;7h&quot;, &quot;7c&quot;, &quot;7d&quot;, &quot;7s&quot;, &quot;8h&quot;, &quot;8c&quot;, &quot;8d&quot;, &quot;8s&quot;, &quot;9h&quot;, &quot;9c&quot;, &quot;9d&quot;, &quot;9s&quot;, &quot;th&quot;, &quot;tc&quot;, &quot;td&quot;, &quot;ts&quot;, &quot;jh&quot;, &quot;jc&quot;, &quot;jd&quot;, &quot;js&quot;, &quot;qh&quot;, &quot;qc&quot;, &quot;qd&quot;, &quot;qs&quot;, &quot;kh&quot;, &quot;kc&quot;, &quot;kd&quot;, &quot;ks&quot;);
  • shuffling and &quot;cutting&quot; a deck of playing cards srand(time()); for($i = 0; $i < 52; $i++) { $count = count($cards); $random = (rand()%$count); if($cards[$random] == &quot;&quot;) { $i--; } else { $deck[] = $cards[$random]; $cards[$random] = &quot;&quot;; } }
  • shuffling and &quot;cutting&quot; a deck of playing cards srand(time()); $starting_point = (rand()%51); print(&quot;Starting point for cut cards is: $starting_point<p>&quot;); // display shuffled cards (EXAMPLE ONLY) for ($index = 0; $index < 52; $index++) { if ($starting_point == 52) { $starting_point = 0; } print(&quot;Uncut Point: <strong>$deck[$index]</strong> &quot;); print(&quot;Starting Point: <strong>$deck[$starting_point]</strong><br>&quot;); $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=&quot;0&quot; width=&quot;100%&quot;> <tr> <td width=&quot;6%&quot; bgcolor=&quot;#00FFFF&quot;><p align=&quot;center&quot;><small><font face=&quot;Verdana&quot;>Rank</font></small></td> <td width=&quot;7%&quot; bgcolor=&quot;#00FFFF&quot;><p align=&quot;center&quot;><small><font face=&quot;Verdana&quot;>Rating</font></small></td>
  • Reader rated most useful diary entries in descending order <td width=&quot;11%&quot; bgcolor=&quot;#00FFFF&quot;><p align=&quot;center&quot;><small><font face=&quot;Verdana&quot;>Diary Date</font></small></td> <td width=&quot;76%&quot; bgcolor=&quot;#00FFFF&quot;><p align=&quot;left&quot;><small><font face=&quot;Verdana&quot;>Description of Diary Page</font></small> </td> <script language=&quot;php&quot;> $db = &quot;DATABASE NAME&quot;; $admin = &quot;MYSQL USER NAME&quot;; $adpass = &quot;MYSQL PASSWORD&quot;; $mysql_link = mysql_connect(&quot;localhost&quot;, $admin, $adpass); mysql_select_db($db, $mysql_link);
  • Reader rated most useful diary entries in descending order $query = &quot;SELECT * FROM avg_tally ORDER BY average DESC&quot;; $result = mysql_query($query, $mysql_link); if(mysql_num_rows($result)) { $rank = 1; while($row = mysql_fetch_row($result)) { print(&quot;</tr><tr>&quot;); if($color == &quot;#D8DBFE&quot;) { $color = &quot;#A6ACFD&quot;; } else { $color = &quot;#D8DBFE&quot;; } print(&quot;<td width=&quot;6%&quot; bgcolor=&quot;$color&quot;><center><small>&quot;); print(&quot;<font face=&quot;Verdana&quot;>$rank</font></small></center></td>&quot;); print(&quot;<td width=&quot;7%&quot; bgcolor=&quot;$color&quot;><center><small>&quot;); print(&quot;<font face=&quot;Verdana&quot;><strong>$row[1]</strong></font></small></center></td>&quot;); print(&quot;<td width=&quot;11%&quot; bgcolor=&quot;$color&quot;><center><small>&quot;); $url = $row[2] . &quot;.php3&quot;;
  • Reader rated most useful diary entries in descending order if(!file_exists($url)) { $url = $row[2] . &quot;.html&quot;; } print(&quot;<font face=&quot;Verdana&quot;><a href=&quot;$url&quot;>$row[2]</a></font></small></center></td>&quot;); print(&quot;<td width=&quot;76%&quot; bgcolor=&quot;$color&quot;><left><small>&quot;); print(&quot;<font face=&quot;Verdana&quot;>$row[3]</font></small></left></td>&quot;); $rank++; } } </script> </table> </BODY> </HTML>
  • 18. creating a mySQL table using a PHP script <? $mysql_db = &quot;DATABASE NAME&quot;; $mysql_user = &quot;YOUR MYSQL USERNAME&quot;; $mysql_pass = &quot;YOUR MYSQL PASSWORD&quot;; $mysql_link = mysql_connect(&quot;localhost&quot;, $mysql_user, $mysql_pass); mysql_select_db($mysql_db, $mysql_link); $create_query = &quot;CREATE TABLE tds_counter ( COUNT_ID INT NOT NULL AUTO_INCREMENT, pagepath VARCHAR(250), impressions INT, reset_counter DATETIME, PRIMARY KEY (COUNT_ID) )&quot;;
  • 19. creating a mySQL table using a PHP script mysql_query($create_query, $mysql_link); print(&quot;Table Creation for <b>tds_counter</b> successful!<p>&quot;); $insert = &quot;INSERT into tds_counter VALUES ( 0, '/php_diary/021901.php3', 0, SYSDATE() )&quot;; mysql_query($insert, $mysql_link); print(&quot;Inserted new counter successfully for this page: http://www.php-scripts.com/php_diary/021901.php3<p>&quot;); ?>
  • 20. mySQL based counter script for multiple pagesAutomating manual tasks, date sorting, mktime() <? $db = &quot;DATABASE NAME&quot;; $admin = &quot;MYSQL USER NAME&quot;; $adpass = &quot;MYSQL PASSWORD&quot;; $mysql_link = mysql_connect(&quot;localhost&quot;, $admin, $adpass); mysql_select_db($db, $mysql_link); $result = mysql_query(&quot;SELECT impressions from tds_counter where COUNT_ID='$cid'&quot;, $mysql_link); if(mysql_num_rows($result)) { mysql_query(&quot;UPDATE tds_counter set impressions=impressions+1 where COUNT_ID='$cid'&quot;, $mysql_link); $row = mysql_fetch_row($result); if($inv != 1) { print(&quot;$row[0]&quot;); } }?>
  • 21. Classify Email as Bounce (DSN) or Automated Reply <?php $bounce = new COM(&quot;Chilkat.Bounce&quot;); $success = $bounce->UnlockComponent('Anything for 30-day trial'); if ($success == false) { print 'Failed to unlock component' . &quot; &quot;; exit; } $email = new COM(&quot;Chilkat.Email&quot;);
  • 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() . &quot; &quot;; exit; }
  • 21. Classify Email as Bounce (DSN) or Automated Reply $success = $bounce->ExamineMail($email); if ($success == false) { print $bounce->lastErrorText() . &quot; &quot;; exit; } if ($bounce->BounceType == 1) { // Hard bounce, log the email address print 'Hard Bounce: ' . $bounce->bounceAddress() . &quot; &quot;; } if ($bounce->BounceType == 2) { // Soft bounce, log the email address print 'Soft Bounce: ' . $bounce->bounceAddress() . &quot; &quot;; }
  • 21. Classify Email as Bounce (DSN) or Automated Reply if ($bounce->BounceType == 3) { // General bounce, no email address available. print 'General Bounce: No email address' . &quot; &quot;; } if ($bounce->BounceType == 4) { // General bounce, log the email address print 'General Bounce: ' . $bounce->bounceAddress() . &quot; &quot;; } if ($bounce->BounceType == 5) { // Mail blocked, log the email address print 'Mail Blocked: ' . $bounce->bounceAddress() . &quot; &quot;; }
  • 21. Classify Email as Bounce (DSN) or Automated Reply if ($bounce->BounceType == 6) { // Auto-reply, log the email address print 'Auto-Reply: ' . $bounce->bounceAddress() . &quot; &quot;; } if ($bounce->BounceType == 7) { // Transient (recoverable) Failure, log the email address print 'Transient Failure: ' . $bounce->bounceAddress() . &quot; &quot;; } if ($bounce->BounceType == 8) { // Subscribe request, log the email address print 'Subscribe Request: ' . $bounce->bounceAddress() . &quot; &quot;; } if ($bounce->BounceType == 9) { // Unsubscribe Request, log the email address print 'Unsubscribe Request: ' . $bounce->bounceAddress() . &quot; &quot;; }
  • 21. Classify Email as Bounce (DSN) or Automated Reply if ($bounce->BounceType == 10) { // Virus Notification, log the email address print 'Virus Notification: ' . $bounce->bounceAddress() . &quot; &quot;; } if ($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!' . &quot; &quot;;} ?>
  • 22. program to print a message <html> <h3>My first PHP Program</h3> <? echo &quot;Hello world!&quot;; ?> </html>
  • 23. PHP Array <?php $employee_names[0] = &quot;Dana&quot;; $employee_names[1] = &quot;Matt&quot;; $employee_names[2] = &quot;Susan&quot;; echo &quot;The first employee's name is &quot;.$employee_names[0]; echo &quot;<br>&quot;; echo &quot;The second employee's name is &quot;.$employee_names[1]; echo &quot;<br>&quot;; echo &quot;The third employee's name is &quot;.$employee_names[2]; ?>
  • 24.File Upload Script <html> <head> <title>A File Upload Script</title> </head> <body> <div> <?php if ( isset( $_FILES['fupload'] ) ) { print &quot;name: &quot;. $_FILES['fupload']['name'] .&quot;<br />&quot;; print &quot;size: &quot;. $_FILES['fupload']['size'] .&quot; bytes<br />&quot;; print &quot;temp name: &quot;.$_FILES['fupload']['tmp_name'] .&quot;<br />&quot;; print &quot;type: &quot;. $_FILES['fupload']['type'] .&quot;<br />&quot;; print &quot;error: &quot;. $_FILES['fupload']['error'] .&quot;<br />&quot;; if ( $_FILES['fupload']['type'] == &quot;image/gif&quot; ) { $source = $_FILES['fupload']['tmp_name']; $target = &quot;upload/&quot;.$_FILES['fupload']['name'];
  • 24.File Upload Script move_uploaded_file( $source, $target );// or die (&quot;Couldn't copy&quot;); $size = getImageSize( $target ); $imgstr = &quot;<p><img width=&quot;$size[0]&quot; height=&quot;$size[1]&quot; &quot;; $imgstr .= &quot;src=&quot;$target&quot; alt=&quot;uploaded image&quot; /></p>&quot;; print $imgstr; } } ?> </div> <form enctype=&quot;multipart/form-data&quot; action=&quot;<?php print $_SERVER['PHP_SELF']?>&quot; method=&quot;post&quot;> <p> <input type=&quot;hidden&quot; name=&quot;MAX_FILE_SIZE&quot; value=&quot;102400&quot; /> <input type=&quot;file&quot; name=&quot;fupload&quot; /><br/> <input type=&quot;submit&quot; value=&quot;upload!&quot; /> </p> </form> </body> </html>
  • 25.Simple File Upload Form <html> <head> <title>A Simple File Upload Form</title> </head> <body> <form enctype=&quot;multipart/form-data&quot; action=&quot;<?print $_SERVER['PHP_SELF']?>&quot; method=&quot;post&quot;> <p> <input type=&quot;hidden&quot; name=&quot;MAX_FILE_SIZE&quot; value=&quot;102400&quot; /> <input type=&quot;file&quot; name=&quot;fupload&quot; /><br/> <input type=&quot;submit&quot; value=&quot;upload!&quot; /> </p> </form> </body> </html>
  • 26.Creating an HTML Form That Accepts Mail-Related Information <html> <head> <title>Simple Send Mail Form</title> </head><body> <h1>Mail Form</h1> <form name=&quot;form1&quot; method=&quot;post&quot; action=&quot;SimpleEmail.php&quot;> <table> <tr><td><b>To</b></td><td><input type=&quot;text&quot; name=&quot;mailto&quot; size=&quot;35&quot;></td></tr> <tr><td><b>Subject</b></td> <td><input type=&quot;text&quot; name=&quot;mailsubject&quot; size=&quot;35&quot;></td></tr> <tr><td><b>Message</b></td> <td><textarea name=&quot;mailbody&quot; cols=&quot;50&quot; rows=&quot;7&quot;></textarea></td> </tr> <tr><td colspan=&quot;2&quot;> <input type=&quot;submit&quot; name=&quot;Submit&quot; value=&quot;Send&quot;> </td></tr></table></form></body> </html>
  • 26.Creating an HTML Form That Accepts Mail-Related Information <!-- SimpleEmail.php <?php if (empty ($mailto) ) { die ( &quot;Recipient is blank! &quot;) ; } if (empty ($mailsubject) ){ $mailsubject=&quot; &quot; ; } if (empty ($mailbody) ) { $mailbody=&quot; &quot; ; } $result = mail ($mailto, $mailsubject, $mailbody) ; if ($result) { echo &quot;Email sent successfully!&quot; ; }else{ echo &quot;Email could not be sent.&quot; ; } ?>
  • 27.React to Form action <HTML> <BODY> <FORM METHOD=&quot;POST&quot; ACTION=&quot;GetFormValue.php&quot;> <H2>Contact List</H2> <BR>Nickname: <BR><INPUT TYPE=&quot;TEXT&quot; NAME=&quot;Nickname&quot;> <BR> <BR>Full Name: <BR><INPUT TYPE=&quot;TEXT&quot; NAME=&quot;Fullname&quot;>
  • 27.React to Form action <BR> <BR>Memo: <BR><TEXTAREA NAME=&quot;Memo&quot; ROWS=&quot;4&quot; COLS=&quot;40&quot; WRAP=&quot;PHYSICAL&quot;> </TEXTAREA> <BR> <BR> <INPUT TYPE=&quot;SUBMIT&quot;> </FORM> </BODY> <!-- GetFormValue.php <?php echo &quot;<BR>Nickname=$Nickname&quot;; echo &quot;<BR>Fullname=$Fullname&quot;; echo &quot;<BR>Memo=$Memo&quot;; ?>
  • 28. Build query string based on form input <?php if (isset($_POST['submit'])) { $rowID = $_POST['id']; mysql_connect(&quot;mysql153.secureserver.net&quot;,&quot;java2s&quot;,&quot;password&quot;); mysql_select_db(&quot;java2s&quot;); $query = &quot;SELECT * FROM Employee WHERE ID='$id'&quot;; $result = mysql_query($query); list($name,$productid,$price,$description) = mysql_fetch_row($result); }
  • 28. Build query string based on form input ?> <form action=&quot;<?php echo $_SERVER['PHP_SELF']; ?>&quot; method=&quot;post&quot;> <select name=&quot;id&quot;> <option name=&quot;&quot;>Choose a employee:</option> <option name=&quot;1&quot;>1</option> <option name=&quot;2&quot;>2</option> <option name=&quot;3&quot;>3</option> </select> <input type=&quot;submit&quot; name=&quot;submit&quot; value=&quot;Submit&quot; /> </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 $value = 'yes'; echo &quot;<input type='checkbox' name='subscribe' value='yes'/> Subscribe?&quot;; if (isset($_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=&quot;POST&quot; ACTION=&quot;DealWithArrayFormData.php&quot;> <H1>Contact Information</H1> <TABLE><TR> <TD>Childrens' Names:</TD> </TR> <TR> <TD><INPUT TYPE=&quot;TEXT&quot; NAME=&quot;children[]&quot;></TD> </TR> <TR> <TD><INPUT TYPE=&quot;TEXT&quot; NAME=&quot;children[]&quot;></TD> </TR> <TR> <TD><INPUT TYPE=&quot;TEXT&quot; NAME=&quot;children[]&quot;></TD> </TR>
  • 31. Deal with Array Form Data <TR> <TD><INPUT TYPE=&quot;TEXT&quot; NAME=&quot;children[]&quot;></TD> </TR> <TR> <TD><INPUT TYPE=&quot;TEXT&quot; NAME=&quot;children[]&quot;></TD> </TR> </TABLE> <BR> <BR> <BR> <INPUT TYPE=&quot;SUBMIT&quot; VALUE=&quot;Submit&quot;> <BR> <BR> <INPUT TYPE=&quot;RESET&quot; VALUE=&quot;Clear the Form&quot;> </FORM> </BODY> </HTML>
  • 31. Deal with Array Form Data <!-- DealWithArrayFormData.php <?php foreach ($children as $index => $child){ echo &quot;<BR>child[$index]=$child&quot;; } echo &quot;<BR>&quot;; sort($children); foreach ($children as $index => $child){ echo &quot;<BR>child[$index]=$child&quot;; } ?> -->
  • 32. A process_form() Function <?php function process_form($data) { $msg = &quot;The form at {$_SERVER['PHP_SELF']} was submitted with these values: &quot;; foreach($data as $key=>$val) { $msg .= &quot;$key => $val &quot;; } mail(&quot;joeuser@somewhere.com&quot;, &quot;form submission&quot;, $msg); } ?>
  • 33. Access widget's form value <INPUT TYPE=&quot;text&quot; NAME=&quot;myform.email&quot;> would be accessed in PHP as the following: <?php echo $_GET['myform_email']; ?>
  • 34. Accessing multiple submitted values <form method=&quot;POST&quot; action=&quot;index.php&quot;> <select name=&quot;lunch[]&quot; multiple> <option value=&quot;a&quot;>A</option> <option value=&quot;b&quot;>B</option> <option value=&quot;c&quot;>C</option> <option value=&quot;d&quot;>D</option> <option value=&quot;e&quot;>E</option> </select> <input type=&quot;submit&quot; name=&quot;submit&quot;> </form> Selected buns: <br/><?php foreach ($_POST['lunch'] as $choice) { print &quot;You want a $choice bun. <br/>&quot;; } ?>
  • 35. Forms and PHP //index.htm <html> <body> <form action=&quot;index.php&quot; method=&quot;post&quot;> Your Name:<br> <input type=&quot;text&quot; name=&quot;name&quot; size=&quot;20&quot; maxlength=&quot;20&quot; value=&quot;&quot;><br> Your Email:<br> <input type=&quot;text&quot; name=&quot;email&quot; size=&quot;20&quot; maxlength=&quot;40&quot; value=&quot;&quot;><br> <input type=&quot;submit&quot; value=&quot;go!&quot;> </form> </body> </html>
  • 35. Forms and PHP //index.php <html> <head> <title></title> </head> <body> <? print &quot;Hi, $name!. Your email address is $email&quot;; ?> </body> </html>
  • 36. Handling Special Characters <html> <body> <?php if ($_POST['submitted'] == &quot;yes&quot;){ $yourname = $_POST['yourname']; $yourname = trim ($yourname); $yourname = strip_tags ($yourname); $yourname = htmlspecialchars ($yourname); $yourname = addslashes ($yourname); echo $yourname . &quot;<br />&quot;; ?><a href=&quot;index.php&quot;>Try Again</a><?php }
  • 36. Handling Special Characters if ($_POST['submitted'] != &quot;yes&quot;){ ?> <form action=&quot;index.php&quot; method=&quot;post&quot;> <p>Example:</p> <input type=&quot;hidden&quot; name=&quot;submitted&quot; value=&quot;yes&quot; /> Your Name: <input type=&quot;text&quot; name=&quot;yourname&quot; maxlength=&quot;150&quot; /><br /> <input type=&quot;submit&quot; value=&quot;Submit&quot; style=&quot;margin-top: 10px;&quot; /> </form> <?php } ?> </div> </body> </html>
  • 37. Saying &quot;Hello&quot; <? if (array_key_exists('my_name',$_POST)) { print &quot;Hello, &quot;. $_POST['my_name']; } else { print<<<_HTML_ <form method=&quot;post&quot; action=&quot;$_SERVER[PHP_SELF]&quot;> Your name: <input type=&quot;text&quot; name=&quot;my_name&quot;> <br/> <input type=&quot;submit&quot; value=&quot;Say Hello&quot;> </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( $_POST['guess'] ) ) { print &quot;last guess: &quot;.$_POST['guess']; }?> <form method=&quot;post&quot; action=&quot;<?php print $_SERVER['PHP_SELF']?>&quot;> <p> Type your guess here: <input type=&quot;text&quot; name=&quot;guess&quot; /> </p></form></div> </body> </html>
  • 39. Form submitting <?php if (isset($_POST['submit'])){ echo &quot;Hi &quot;.$_POST['name'].&quot;!<br />&quot;; echo &quot;The address &quot;.$_POST['email'].&quot; will soon be a spam-magnet!<br />&quot;; } ?> <form action=&quot;index.php&quot; method=&quot;post&quot;> Name:<input type=&quot;text&quot; name=&quot;name&quot; size=&quot;20&quot; maxlength=&quot;40&quot; value=&quot;&quot; /> Email Address: <input type=&quot;text&quot; name=&quot;email&quot; size=&quot;20&quot; maxlength=&quot;40&quot; value=&quot;&quot; /> <input type=&quot;submit&quot; name = &quot;submit&quot; value=&quot;Go!&quot; /> </form>
  • 40. One-script form processing //File: index.php <html> <head> <title></title> </head> <body> <? $form = &quot;<form action=&quot;index.php&quot; method=&quot;post&quot;> <input type=&quot;hidden&quot; name=&quot;seenform&quot; value=&quot;y&quot;> <b>Give us some information!</b><br> Your Name:<br> <input type=&quot;text&quot; name=&quot;name&quot; size=&quot;20&quot; maxlength=&quot;20&quot; value=&quot;&quot;><br>
  • 40. One-script form processing Your Email:<br> <input type=&quot;text&quot; name=&quot;email&quot; size=&quot;20&quot; maxlength=&quot;40&quot; value=&quot;&quot;><br> <input type=&quot;submit&quot; value=&quot;subscribe!&quot;> </form>&quot;; if ($seenform != &quot;y&quot;): print &quot;$form&quot;; else : print &quot;Hi, $name!. Your email address is $email&quot;; endif; ?> </body> </html>
  • 41. Preventing Multiple Submissions on the Client Side <html> <script language=&quot;javascript&quot; type=&quot;text/javascript&quot;> function checkandsubmit() { document.test.submitbut.disabled = true; document.test.submit(); } </script> <body> <form action=&quot;index.php&quot; method=&quot;post&quot; name=&quot;test&quot; onsubmit=&quot;return checkandsubmit ()&quot;> <input type=&quot;hidden&quot; name=&quot;submitted&quot; value=&quot;yes&quot; /> Your Name: <input type=&quot;text&quot; name=&quot;yourname&quot; maxlength=&quot;150&quot; />
  • 41. Preventing Multiple Submissions on the Client Side <input type=&quot;submit&quot; value=&quot;Submit&quot; id=&quot;submitbut&quot; name&quot;submitbut&quot; /></form> </body> </html> <?php if ($file = fopen ( &quot;test.txt&quot;, &quot;w+&quot; )) { fwrite ( $file, &quot;Processing&quot; ); } else { echo &quot;Error opening file.&quot;; } echo $_POST ['yourname']; ?>
  • 42. Preventing Multiple Submissions on the Server Side <html> <body> <form action=&quot;index.php&quot; method=&quot;post&quot;> <input type=&quot;hidden&quot; name=&quot;submitted&quot; value=&quot;yes&quot; /> Your Name: <input type=&quot;text&quot; name=&quot;yourname&quot; maxlength=&quot;150&quot; /><br /> <input type=&quot;submit&quot; value=&quot;Submit&quot; style=&quot;margin-top: 10px;&quot; /></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 ( &quot;test.txt&quot;, &quot;w+&quot; )) { fwrite ( $file, &quot;Processing&quot; ); } else { echo &quot;Error opening file.&quot;; } echo $_POST ['yourname']; unset ( $_SESSION ['processing'] ); } ?>
  • 43. Authenticate user: Database based <?php function authenticate_user() { header('WWW-Authenticate: Basic realm=&quot;Secret Stash&quot;'); header(&quot;HTTP/1.0 401 Unauthorized&quot;); exit; } if (! isset($_SERVER['PHP_AUTH_USER'])) { authenticate_user(); } else { mysql_pconnect(&quot;localhost&quot;,&quot;authenticator&quot;,&quot;secret&quot;) or die(&quot;Can't connect to database server!&quot;); mysql_select_db(&quot;java2s&quot;) or die(&quot;Can't select authentication database!&quot;);
  • 43. Authenticate user: Database based $query = &quot;SELECT username, pswd FROM user WHERE username='$_SERVER[PHP_AUTH_USER]' AND pswd=MD5('$_SERVER[PHP_AUTH_PW]')&quot;; $result = mysql_query($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') || ($_SERVER['PHP_AUTH_PW'] != 'secretpassword')) { header('WWW-Authenticate: Basic Realm=&quot;Secret Stash&quot;'); header('HTTP/1.0 401 Unauthorized'); print('You must provide the proper credentials!'); exit; } ?>
  • 45. Open browser password dialog and authenticate user based on database <?php function authenticate_user() { header('WWW-Authenticate: Basic realm=&quot;Secret Stash&quot;'); header(&quot;HTTP/1.0 401 Unauthorized&quot;); exit; } if(! isset($_SERVER['PHP_AUTH_USER'])) { authenticate_user(); }
  • 45. Open browser password dialog and authenticate user based on database else { mysql_connect(&quot;localhost&quot;,&quot;authenticator&quot;,&quot;secret&quot;) or die(&quot;Can't connect to database server!&quot;); mysql_select_db(&quot;gilmorebook&quot;) or die(&quot;Can't select authentication database!&quot;); $query = &quot;SELECT username, pswd FROM user WHERE username='$_SERVER[PHP_AUTH_USER]' AND pswd=MD5('$_SERVER[PHP_AUTH_PW]') AND ipAddress='$_SERVER[REMOTE_ADDR]'&quot;; $result = mysql_query($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 $loginfo = array ( FirstName => &quot;Joe&quot;, LastName => &quot;Howrod&quot;, Sex => &quot;Male&quot;, Location => &quot;Arizona&quot;, Age => &quot;24&quot;, MusicChoice => &quot;Pop&quot;, Hobby => &quot;Dance&quot;, Occupation => &quot;Author&quot;); echo &quot;<H3>The information entered by JOe:<BR></H3>&quot;; foreach ($loginfo as $key => $val) { echo &quot;<B>$key</B> => $val<BR>&quot;; }
  • 46. Login ID Options echo &quot;<BR> &quot;; echo &quot;<H3>The login options are:<BR></H3>&quot;; $loginone = array_slice ($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, &quot;2001&quot;); echo &quot;The first login option:<BR>&quot;; foreach ($loginone as $optionone) { echo &quot;<B>$optionone</B>&quot;; } echo &quot;<BR>&quot;; echo &quot;The second login option:<BR>&quot;; foreach ($loginone as $optiontwo) { echo &quot;<B>$optiontwo</B>&quot;; } echo &quot;<BR>&quot;;
  • 46. Login ID Optionsn echo &quot;The third login option:<BR>&quot;; foreach ($loginthree as $optionthree) { echo &quot;<B>$optionthree</B>&quot;; } echo &quot;<BR>&quot;; echo &quot;The fourth login option:<BR>&quot;; foreach ($loginfour as $optionfour) { echo &quot;<B>$optionfour</B>&quot;; } echo &quot;<BR>&quot;; echo &quot;The fifth login option:<BR>&quot;; foreach ($loginfive as $optionfive) { echo &quot;<B>$optionfive</B>&quot;; } echo &quot;<BR>&quot;; ?> </BODY> </HTML>
  • 47. Get uniqid <? $id = uniqid(&quot;phpuser&quot;); echo &quot;$id&quot;; ?>
  • 48. Use md5 function to encrypt text <?php $val = &quot;secret&quot;; echo &quot;Pre-hash string: $val <br />&quot;; $hash_val = md5 ($val); echo &quot;Hashed outcome: $hash_val&quot;; ?>
  • 49. md5 and uniqid <? $id = md5(uniqid(rand())); echo &quot;$id&quot;; ?>
  • 50. A user registration process create table user_info ( user_id char(18), fname char(15), email char(35)); //File: index.php <? $form = &quot; <form action=&quot;index.php&quot; method=&quot;post&quot;> <input type=&quot;hidden&quot; name=&quot;seenform&quot; value=&quot;y&quot;> Your first name?:<br> <input type=&quot;text&quot; name=&quot;fname&quot; value=&quot;&quot;><br> Your email?:<br> <input type=&quot;text&quot; name=&quot;email&quot; value=&quot;&quot;><br> <input type=&quot;submit&quot; value=&quot;Register!&quot;> </form> &quot;;
  • 50. A user registration process if ((! isset ($seenform)) && (! isset ($userid))) : print $form; elseif (isset ($seenform) && (! isset ($userid))) : $uniq_id = uniqid(rand()); @mysql_pconnect(&quot;localhost&quot;, &quot;root&quot;, &quot;&quot;) or die(&quot;Could not connect to MySQL server!&quot;); @mysql_select_db(&quot;user&quot;) or die(&quot;Could not select user database!&quot;); $query = &quot;INSERT INTO user_info VALUES('$uniq_id', '$fname', '$email')&quot;; $result = mysql_query($query) or die(&quot;Could not insert user information!&quot;); setcookie (&quot;userid&quot;, $uniq_id, time()+2592000); print &quot;Congratulations $fname! You are now registered!.&quot;;
  • 50. A user registration process elseif (isset($userid)) : @mysql_pconnect(&quot;localhost&quot;, &quot;root&quot;, &quot;&quot;) or die(&quot;Could not connect to MySQL server!&quot;); @mysql_select_db(&quot;user&quot;) or die(&quot;Could not select user database!&quot;); $query = &quot;SELECT * FROM user_info WHERE user_id = '$userid'&quot;; $result = mysql_query($query) or die(&quot;Could not extract user information!&quot;); $row = mysql_fetch_array($result); print &quot;Hi &quot;.$row[&quot;fname&quot;].&quot;,<br>&quot;; print &quot;Your email address is &quot;.$row[&quot;email&quot;]; endif; ?>
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