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.

Transcript 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.

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 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.
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 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!
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("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]\">$url_title[$r
andom]</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: ' . $bounce->bounceAddress() . "\n";
}
21. Classify Email as Bounce (DSN)
or($bounce->BounceType
Automated Reply
if
== 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
// [email protected] 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

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("[email protected]", "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;
?>
THANK YOU