Question

I tested this on firefox and it works fine, but in IE it doesn’t work because of comma on last part of array. Now how can I remove comma using php?

Actual result:

{image : 'folder/pic1.jpg', title : '', thumb : 'folder/pic1.jpg', url : ''},
{image : 'folder/pic2.jpg', title : '', thumb : 'folder/pic2.jpg', url : ''},
{image : 'folder/pic3.jpg', title : '', thumb : 'folder/pic3.jpg', url : ''},

Expected result:

{image : 'folder/pic1.jpg', title : '', thumb : 'folder/pic1.jpg', url : ''},
{image : 'folder/pic2.jpg', title : '', thumb : 'folder/pic2.jpg', url : ''},
{image : 'folder/pic3.jpg', title : '', thumb : 'folder/pic3.jpg', url : ''}

Code:

<?php 
$directory = "pic/";

$images = glob("".$directory."{*.jpg,*.JPG,*.PNG,*.png}", GLOB_BRACE);

if ($images != false)
{
?>
<script type="text/javascript">
    jQuery(function($){
        $.supersized({
            slideshow:   1,//Slideshow on/off
            autoplay:    1,//Slideshow starts playing automatically
            start_slide: 1,//Start slide (0 is random)
            stop_loop:   0,
            slides:      [// Slideshow Images

            <?php
    foreach( $images as $key => $value){
                 echo "{image : '$value', title : '', thumb : '$value', url : ''},";
            }
            ?>
            ],
            progress_bar: 1,// Timer for each slide
            mouse_scrub: 0
</script>
<?php
}
?>

Answer 1

You don’t need to hand-code your own JSON. Use json_encode()

echo json_encode($images);

To answer the question nonetheless, there’s two ways of avoiding the trailing comma (which should indeed be removed, even if Firefox et al let you get away with it)

1 – conditionlise its output in your loop

$arr = array('apple', 'pear', 'orange');
foreach($arr as $key => $fruit) {
    echo $fruit;
    if ($key < count($arr) - 1) echo ', ';
}

Note this will work only for indexed arrays. For associative ones, you’d have to set up your own counter variable (since $key would not be a number).

2 – remove it afterwards, e.g. with REGEX

$str = "apple, pear, orange, ";
$str = preg_replace('/, ?$/', '', $str);