Ik wil graag een eigen poll maken in PHP.
Ik heb hiervoor het volgende script gebruikt:
PHP-code:
<?
////////////////////////////////////////////////////////////
//
// poll.php - a voting poll
//
////////////////////////////////////////////////////////////
//
// This script adds votes to a poll and displays the poll.
//
// See readme.txt for more information.
//
//
// Last Modified: 5/01/03
//
// You may freely use, modify, and distribute this script.
// You may remove this notice.
//
////////////////////////////////////////////////////////////
// DEFINE THE VARIABLES //
// title of this poll
$title = "poll1?";
// closing date for this poll in MM/DD/YYYY format
$closingDate = "1/1/2100";
// text file that stores vote choices and totals
$pollFile = "poll.txt";
// text file that stores IP addresses
$ipFile = "ips.txt";
// full path to your CSS style sheet
$styleSheet = "http://yoursite/style.css"; // leave blank if you aren't using this
// DO NOT EDIT BELOW THIS POINT UNLESS YOU KNOW PHP! //
// DEFINE THE FUNCTIONS //
// check if the poll has closed
function is_closed() {
global $closingDate;
// split the closing date into month, day, and year
$closingDate = explode("/", $closingDate);
// get today's today to test against the closing date
$today = getdate();
$message = date("l, F j", mktime(0,0,0,$closingDate[0],$closingDate[1],$today[year]));
// if today's year is greater than the closing year, return true
if ($today[year] > $closingDate[2]) {
return $message;
}
// if today's year is equal to the closing year
elseif ($today[year] == $closingDate[2]) {
// if today's month is greater than the closing month, return true
if ($today[mon] > $closingDate[0]) {
return $message;
}
// if today's month is equal to the closing month
elseif ($today[mon] == $closingDate[0]) {
// if today is greater than or equal to the closing day, return true
if ($today[mday] >= $closingDate[1]) {
return $message;
}
// if the poll is still open, return false
else {
return false;
}
}
// if the poll is still open, return false
else {
return false;
}
}
// if the poll is still open, return false
else {
return false;
}
}
// check if the user has already voted
function has_voted() {
global $ipFile;
global $REMOTE_ADDR;
// open the IP address file
$ips = fopen($ipFile, "r");
// compare each entry with the user's IP address
while (!feof($ips)) {
$ip = fgets($ips, 20);
if ($ip == $REMOTE_ADDR . "\r\n") {
$match = 1;
break;
}
}
// close the IP address file
fclose($ips);
if (!$match) {
// reopen the IP address file
$ips = fopen($ipFile, "a");
// add the user's IP address
fputs($ips, $REMOTE_ADDR . "\r\n");
// close the IP address file
fclose($ips);
return false;
}
else {
return true;
}
}
// add the user's vote
function addVote($vote) {
global $pollFile;
// get the current votes
$fp_read = fopen($pollFile, "r");
$currentVote = fread($fp_read, filesize($pollFile));
fclose($fp_read);
// create an array with even numbers containing vote choices
// and odds containing vote totals
$votes = split('[|:]', $currentVote);
// update the vote
for ($i = 1; $i < count($votes); $i = $i + 2) {
// get the array index number for the name of this vote
$name = $i - 1;
// if this vote choice is this user's selection, increment it
if ($votes[$name] == $vote) {
$votes[$i]++;
}
// if this vote IS the last choice
if ($i == (count($votes) - 1)) {
$updatedVote .= $votes[$name] . ":" . $votes[$i];
}
// if this vote is NOT the last choice
else {
$updatedVote .= $votes[$name] . ":" . $votes[$i] . "|";
}
}
// save the updated vote
$fp_write = fopen($pollFile, "w");
fputs($fp_write, $updatedVote);
fclose($fp_write);
}
// display the poll
function displayPoll($message) {
global $title, $pollFile;
// get the current votes
$fp_read = fopen($pollFile, "r");
$currentVote = fread($fp_read, filesize($pollFile));
fclose($fp_read);
// create an array with even numbers containing vote choices
// and odds containing vote totals
$votes = split('[|:]', $currentVote);
// begin printing the poll table
echo "<html>\n";
echo "<head>\n";
echo "<title>$title</title>\n";
if ($styleSheet != "" && $styleSheet != "http://yoursite/style.css") {
echo "<link rel=stylesheet type=text/css href=\"$styleSheet\">\n";
}
echo "</head>\n\n";
echo "<body>\n";
echo "<basefont face=Arial>\n\n";
// if a message was sent, print it
if (isset($message)) {
echo "<p align=center>$message</p>\n\n";
}
echo "<table align=center>\n";
echo "<caption align=top><b>$title</b></caption>\n";
// print the poll table rows
// including vote choice, vote total, and percentage of total votes
for ($i = 1; $i < count($votes); $i = $i + 2)
{
// add together each vote total to find the total number of votes cast
$totalVotes += $votes[$i];
}
for ($i = 1; $i < count($votes); $i = $i + 2) {
// get the array index number for the name of this vote
$name = $i - 1;
// calculate the percentage of total votes for this vote
// rounded to 1 decimal place
$percentage = $votes[$i] / $totalVotes * 100;
$percentage = round($percentage, 1);
echo "<tr>\n";
echo "\t<td>$votes[$name]</td>\n";
echo "\t<td>$votes[$i] votes</td>\n";
// if the percentage is 0, don't print a bar
if ($percentage == 0) {
echo "\t<td>$percentage%</td>\n";
}
// otherwise, print the bar
else {
echo "\t<td><img src=poll.jpg width=$percentage height=15> $percentage%</td>\n";
}
echo "</tr>\n";
}
// print the total number of votes cast
echo "<caption align=bottom>Total Votes: $totalVotes</caption>\n";
// finish printing the poll table
echo "</table>\n";
echo "\n</body>\n";
echo "</html>";
}
// PROGRAM CODE //
// if the poll is closed, display the poll and exit
if ($message = is_closed()) {
displayPoll("The poll closed on " . $message . ".");
exit;
}
// if the user is not voting, display the poll and exit
if (!isset($vote)) {
displayPoll("");
exit;
}
// if the user has already voted, display the poll and exit
if (has_voted()) {
displayPoll("You have already voted.");
exit;
}
// add the user's vote
addVote($vote);
// display the poll
displayPoll("");
?>
Bovenstaande script had standaard al deze vragen:
What is your favorite programming language?
- HTML
- JavaScript
- Perl
- PHP
Deze vragen zijn in het volgende HTML bestand te vinden:
<html>
<head>
<title>What is your favorite programming language?</title>
</head>
<body>
<basefont face=Arial>
<form action=poll.php method=post>
What is your favorite programming language?<br>
<input type=radio name=vote value=HTML> HTML<br>
<input type=radio name=vote value=JavaScript> JavaScript<br>
<input type=radio name=vote value=Perl> Perl<br>
<input type=radio name=vote value=PHP> PHP<br>
<input type=submit value=Vote>
</form>
</body>
</html>
Ik wil nu graag een paar x-tra keuzes toevoegen aan bovenstaande poll, hoe doe ik dat 
05-01-2003, 16:54
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