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Button click counter save number

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花落未央
花落未央 2020-12-18 15:53

I have this fiddle where when the user clicks a button the counter works: http://jsfiddle.net/z66WF/

This is the code:

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  • 暗喜
    2020-12-18 16:25

    Here you have a working simple exemple, wich write the counter in a simple txt file (no sql db needed)

    <?php

    $counterFile = 'counter.txt' ;

    // jQuery ajax request is sent here
    if ( isset($_GET['increase']) )
    {
        if ( ( $counter = @file_get_contents($counterFile) ) === false ) die('Error : file counter does not exist') ;
        file_put_contents($counterFile,++$counter) ;
        echo $counter ;
        return false ;
    }

    if ( ! $counter = @file_get_contents($counterFile) )
    {
        if ( ! $myfile = fopen($counterFile,'w') )
            die('Unable to create counter file !!') ;
        chmod($counterFile,0644);
        file_put_contents($counterFile,0) ;
    }

?>
<html>
    <head>
        <script type="text/javascript" src="https://code.jquery.com/jquery-2.1.1.min.js"></script>
        <script type="text/javascript">
            jQuery(document).on('click','a#download',function(){
                jQuery('div#counter').html('Loading...') ;
                var ajax = jQuery.ajax({
                    method : 'get',
                    url : '/test.php', // Link to this page
                    data : { 'increase' : '1' }
                }) ;
                ajax.done(function(data){
                    jQuery('div#counter').html(data) ;
                }) ;
                ajax.fail(function(data){
                    alert('ajax fail : url of ajax request is not reachable') ;
                }) ;
            }) ;
        </script>
    </head>
    <div id="counter"><?php echo $counter ; ?></div>
    <a href="" id="download" onclick="window.open(this.href);return false;">Download btn</a>
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  • 抹茶落季
    2020-12-18 16:42

    You need a DB connection to do this.

    When the button is clicked, by any user, the value from let's say: "downloaded_times" will be increased with 1.

    so you will need a query like:

    UPDATE table SET downloaded_times = downloaded_times + 1

    this query will be called each time someone presses the button.

    If you want to display it, before a certain user wants to start a download, you simply fetch the result from DB and the echo it. You can do more, if you want that field to be constantly refreshed, the fetching and echoing part should be in a ajax called PHP function, that will refresh the div (for instance) every 30 second or so :D

    Hope this helps! :D

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