analyze:
We use a file() to store the voting columns. Each column occupies one line.
In this way, you can add and subtract the columns you want to vote for at will.
We use another file() to store our voting results.
And record the IP address of a recent voter, simply preventing one person from voting more.
Therefore, you should create two files and
Program running process part
When the program runs, there should be a voting HTML form first, waiting for the voting.
When someone votes on an HTML form, determine whether its IP is the IP of one of the most recent voter,
If this person has just voted, the two values should be equal, showing "You have voted, thank you for your participation!"
If this person has not voted, the two values are different, and its vote is written to file()
(The IP method of obtaining the voter here is: the web client needs to provide a table identity when sending a request to the server.
This table identity is stored in the environment variable REMOTE_ADDR, and we can just refer to it.)
Finally, we display the voting results. Usually, we use "bar chart + percentage" to display the voting situation.
Therefore, we need to choose a rectangular figure with a single color to meet the requirements of horizontal scaling.
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Program code part: Download program code
//The voting column stores files, you can change the file name
$data="";
//Storage the voting results.
$votes="";
//Graphic file name used to display the voting result ratio,
//It is better to use a single color rectangle to facilitate horizontal scaling of voting results,
//Upload to this program directory by yourself.
$path_img="";
//Voting title
$poll_name="Which column do you like about me?";
// The following parts do not need to be changed//
//Open the voting column file and store all contents in the variable $dataf as an array.
$dataf=file($data);
if ($go !=1)
{
//Show the voting procedure form
echo "<font color=red><i>$poll_name</i></font><br>n";
echo "<form method=post>";
for ($i=0; $i<=count($dataf)-1; $i++)
{
echo "<input type=radio name="vote" value="$i"> $dataf[$i]<br>n"; }
echo "<input type=hidden name=go value=1>";
echo "<p><input type=Submit value=voting>";
echo "</form>";
echo "<a href='?result=1&go=1'>View the results</a>";
}
else
{
// $go==1 means someone votes, // Now read the voting situation from the file in another way $file_votes=fopen($votes, "r");
$line_votes=fgets($file_votes, 255);
fclose($file_votes);
// �
$single_vote=explode("|", $line_votes);
//Prepare to write the voting results
if ($result!=1)
{
//Check whether the IP address is duplicate
$file_votes=file($votes, "r");
if ($REMOTE_ADDR == $file_votes[1])
{
echo "<center><font color=red>You have voted, thank you for your participation! </font> </center>";
exit;
}
//If the IP does not repeat, execute the following program
$ficdest=fopen($votes, "w");
for ($i=0; $i<=count($dataf)-1; $i++)
{
//Judge which column you have submitted
if ($i == $vote)
{
$single_vote[$i]+=1;
}
//Write the data back to the file
fputs($ficdest, "$single_vote[$i]|");
}
//Write to voter IP
fputs($ficdest, "n$REMOTE_ADDR");
fclose($ficdest);
$result=1; //Voting is successful
}
//Write the voting results and display the voting results.
if ($result==1)
{ echo "<table cellpadding=10>";
for ($i=0; $i<=count($dataf)-1; $i++)
{
//Get the total number of votes
$tot_votes+=$single_vote[$i];
}
for ($i=0; $i<=count($dataf)-1; $i++)
{
//Calculate the percentage
$stat[$i]=$single_vote[$i]/$tot_votes*100;
echo "<tr><td><li><font face=Verdana size=2>";
echo "$dataf[$i]</font></td><td align=left><font face=Verdana size=2>";
echo "<img src="$path_img" height=10 width=$stat[$i] align=middle> ";
//Output percentage printf("%.1f", "$stat[$i]");
echo "%</font></td><td align=center><font face=Verdana size=2>"; //Output the number of votes in this column
echo "$single_vote[$i]</font>"; echo "</td></tr>";
}
echo "</table><p>";
echo "<font face=Verdana size=2>Total number of votes: $tot_votes </font>";
}
}
?>
We use a file() to store the voting columns. Each column occupies one line.
In this way, you can add and subtract the columns you want to vote for at will.
We use another file() to store our voting results.
And record the IP address of a recent voter, simply preventing one person from voting more.
Therefore, you should create two files and
Program running process part
When the program runs, there should be a voting HTML form first, waiting for the voting.
When someone votes on an HTML form, determine whether its IP is the IP of one of the most recent voter,
If this person has just voted, the two values should be equal, showing "You have voted, thank you for your participation!"
If this person has not voted, the two values are different, and its vote is written to file()
(The IP method of obtaining the voter here is: the web client needs to provide a table identity when sending a request to the server.
This table identity is stored in the environment variable REMOTE_ADDR, and we can just refer to it.)
Finally, we display the voting results. Usually, we use "bar chart + percentage" to display the voting situation.
Therefore, we need to choose a rectangular figure with a single color to meet the requirements of horizontal scaling.
--------------------------------------------------------------------------------
Program code part: Download program code
//The voting column stores files, you can change the file name
$data="";
//Storage the voting results.
$votes="";
//Graphic file name used to display the voting result ratio,
//It is better to use a single color rectangle to facilitate horizontal scaling of voting results,
//Upload to this program directory by yourself.
$path_img="";
//Voting title
$poll_name="Which column do you like about me?";
// The following parts do not need to be changed//
//Open the voting column file and store all contents in the variable $dataf as an array.
$dataf=file($data);
if ($go !=1)
{
//Show the voting procedure form
echo "<font color=red><i>$poll_name</i></font><br>n";
echo "<form method=post>";
for ($i=0; $i<=count($dataf)-1; $i++)
{
echo "<input type=radio name="vote" value="$i"> $dataf[$i]<br>n"; }
echo "<input type=hidden name=go value=1>";
echo "<p><input type=Submit value=voting>";
echo "</form>";
echo "<a href='?result=1&go=1'>View the results</a>";
}
else
{
// $go==1 means someone votes, // Now read the voting situation from the file in another way $file_votes=fopen($votes, "r");
$line_votes=fgets($file_votes, 255);
fclose($file_votes);
// �
$single_vote=explode("|", $line_votes);
//Prepare to write the voting results
if ($result!=1)
{
//Check whether the IP address is duplicate
$file_votes=file($votes, "r");
if ($REMOTE_ADDR == $file_votes[1])
{
echo "<center><font color=red>You have voted, thank you for your participation! </font> </center>";
exit;
}
//If the IP does not repeat, execute the following program
$ficdest=fopen($votes, "w");
for ($i=0; $i<=count($dataf)-1; $i++)
{
//Judge which column you have submitted
if ($i == $vote)
{
$single_vote[$i]+=1;
}
//Write the data back to the file
fputs($ficdest, "$single_vote[$i]|");
}
//Write to voter IP
fputs($ficdest, "n$REMOTE_ADDR");
fclose($ficdest);
$result=1; //Voting is successful
}
//Write the voting results and display the voting results.
if ($result==1)
{ echo "<table cellpadding=10>";
for ($i=0; $i<=count($dataf)-1; $i++)
{
//Get the total number of votes
$tot_votes+=$single_vote[$i];
}
for ($i=0; $i<=count($dataf)-1; $i++)
{
//Calculate the percentage
$stat[$i]=$single_vote[$i]/$tot_votes*100;
echo "<tr><td><li><font face=Verdana size=2>";
echo "$dataf[$i]</font></td><td align=left><font face=Verdana size=2>";
echo "<img src="$path_img" height=10 width=$stat[$i] align=middle> ";
//Output percentage printf("%.1f", "$stat[$i]");
echo "%</font></td><td align=center><font face=Verdana size=2>"; //Output the number of votes in this column
echo "$single_vote[$i]</font>"; echo "</td></tr>";
}
echo "</table><p>";
echo "<font face=Verdana size=2>Total number of votes: $tot_votes </font>";
}
}
?>