在php中设置后台计时器

Question

I like to do a "background timer" but I don't know how. The main things: I have if, and if I go in I like to set the time, and start a timer ($ido = $split[0]*60*60 + $split[1]*60 + $split[2]; sleep($ido);), and after this timer end, I like to run a function ($jatek->epuletkesz();) but, after this if, I have another things, and if i start sleep the page loading is stop because wait for the sleep end. But I like, the sleep go in "background" and don't stop the page things, only the one function run after sleep end. (Sorry for bad English, I hope u can understand my problem.)

Here is the code:

if(empty($üzi)) {
    echo "<script type='text/javascript'>alert('Sikeres fejlesztés!');</script>";

    $nyers = $jatek->kovnyers($epulet);

    $split = explode(":", $nyers['epetesiido']);
    $ido = $split[0]*60*60 + $split[1]*60 + $split[2];
    sleep($ido);
    $jatek->epuletkesz();
    //header( 'Location: ../views/jatek.php' );
}

Answer 1

Well one possible solution is that you generate some classes in you css with different background. Like this :

.background1 {
    background: url('../img/img1.jpg');
}

.background2 {
    background: url('../img/img1.jpg');
}

In javascript you need a function to change the background like :

/**
 * elem jquery elemnt to update
 * background class to add
 */
var updateBackground = function(background, elem) {
    var bck_list = ['background1', 'background2'];
    elem.addClass(active);

    jQuery.each(bck_list, function( index, value ) {
        if (value !== active) {
            elem.removeClass(value);
        } else {
            var next_index = index + 1;
        }
    });

    // check if the next background exists
    if (bck_list[next_index] === undefined) {
         next_index = 0;
    }

    setTimeout(function(){ updateBackground(bck_list[next_index], elem); }, 30000);
}

At the end a timer :

setTimeout(function(){ updateBackground("background1", $('#elem_to_update')); }, 30000);