Create your custom poll using txt file instead of MySQL

Published on : June 3, 2014

Author: Masum

Category: PHP

Step 1: Create a html page with your question


<div id="poll">
<h3>Do you like this post?</h3>
    <form>
        Yes: <input type="radio" name="vote" value="0" >
        <br>No: <input type="radio" name="vote" value="1">
    </form>
</div>

Step 2: Now, create a javascript function that will work onClick with following code


<script>
function pollVote(int)
{
	if (window.XMLHttpRequest)
	{// code for IE7+, Firefox, Chrome, Opera, Safari
		xmlhttp=new XMLHttpRequest();
	}
	else
	{// code for IE6, IE5
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	xmlhttp.onreadystatechange=function()
	{
		if (xmlhttp.readyState==4 && xmlhttp.status==200)
		{
			document.getElementById("poll").innerHTML=xmlhttp.responseText;
		}
	}
	xmlhttp.open("GET","poll_vote.php?vote="+int,true); //your form submitted to poll_vote.php
	xmlhttp.send();
}
</script>

Step 3: Update you HTML code as like below


<div id="poll">
<h3>Do you like this post?</h3>
    <form>
        Yes: <input type="radio" name="vote" value="0" onclick="pollVote(this.value)">
        <br>No: <input type="radio" name="vote" value="1" onclick="pollVote(this.value)">
    </form>
</div>

;

Step 4: Take a new php file in the name “poll_vote.php” that you already define into javascript function and write following code.


<?php
	echo $vote = $_REQUEST['vote'];
?>

Step 5: Create a txt file where you will store your votes in the name “poll_result.txt”.

Step 6: Add you txt file name into PHP file and insert data into txt file using following code.


<?php
$vote = $_REQUEST['vote'];

$filename = "poll_result.txt"; //file name

//put content in array
$content = file($filename);
$array = explode("||", $content[0]);
$yes = $array[0];
$no = $array[1];

if ($vote == 0){ $yes = $yes + 1;}
if ($vote == 1){ $no = $no + 1;}

//insert votes to txt file
$insertvote = $yes."||".$no;
$fp = fopen($filename,"w");
fputs($fp,$insertvote);
fclose($fp);
?>

Step 7: print your poll data


<h1>Result:</h1>
<table>
    <tr>
        <td>Yes:</td>
        <td>
            <img src="poll.gif" width='<?php echo(100*round($yes/($no+$yes),2)); ?>' height='10'> <?php echo(100*round($yes/($no+$yes),2)); ?>%
        </td>
    </tr>
    <tr>
        <td>No:</td>
        <td>
        <img src="poll.gif" width='<?php echo(100*round($no/($no+$yes),2)); ?>' height='10'> <?php echo(100*round($no/($no+$yes),2)); ?>%
        </td>
    </tr>
</table>

So, you final PHP code is-


<?php
$vote = $_REQUEST['vote'];

$filename = "poll_result.txt"; //file name
$content = file($filename);

//put content in array
$array = explode("||", $content[0]);
$yes = $array[0];
$no = $array[1];

if ($vote == 0){ $yes = $yes + 1;}
if ($vote == 1){ $no = $no + 1;}

//insert votes to txt file
$insertvote = $yes."||".$no;
$fp = fopen($filename,"w");
fputs($fp,$insertvote);
fclose($fp);

?>

<h1>Result:</h1>
<table>
    <tr>
        <td>Yes:</td>
        <td>
            <img src="poll.gif" width='<?php echo(100*round($yes/($no+$yes),2)); ?>' height='10'> <?php echo(100*round($yes/($no+$yes),2)); ?>%
        </td>
    </tr>
    <tr>
        <td>No:</td>
        <td>
        <img src="poll.gif" width='<?php echo(100*round($no/($no+$yes),2)); ?>' height='10'> <?php echo(100*round($no/($no+$yes),2)); ?>%
        </td>
    </tr>
</table>

You can download full source code from here- Source code