WordPress Custom Paging

gistfile1.php

<?php
$perpage = 12;
$arg = Array(
	'posts_per_page'=> $perpage,
	'post_type'=>'product',
	'paged'=> $paged
);
$query = new WP_Query($arg);
$numrows = $query->found_posts;
if($query->have_posts()) 
while($query->have_posts()) : $query->the_post(); 
// post item here
endwhile;

//ini paging nya
custom_paging($numrows,$paged,$perpage,'paged','pagination','current',true);

///ini function custom_paging nya,
//dipisah aja, atau tempatkan di functions.php

function custom_paging($numrows,$paged,$perpage,$page_query='page',$class='paging',$currentclass='current',$echo=true,$before=''){
	parse_str($_SERVER['QUERY_STRING'],$current_query);

	$max_pages		= ceil($numrows/$perpage);
	$paged			= $paged ? $paged : 1;

	if($max_pages <= 1) return false;

	if($echo == false) {
		
	}
	else {
	echo '<ul class="'.$class.'">';
	?>
	<?php echo $before;?>
		<li><a title="First" href="<?php echo add_query_arg($page_query,1);?>">l<</a></li>
		<?php if($paged > 1) { ?>
		<li><a title="Prev" href="<?php echo add_query_arg($page_query,$paged-1);?>"><</a></li>
		<?php } ?>
	<?php
		for($i=1;$i<=$max_pages;$i++){

			if(($i >= ($paged-3)) AND ($i <= ($paged+3))) { ?>
				<li <?php echo ($i == $paged) ? 'class="'.$currentclass.'"': '';?>>
					<a href="<?php echo add_query_arg($page_query,$i);?>"><?php echo $i;?></a></li>
				<?php
			}
		}
	?>	
		<?php if($paged < $max_pages) { ?>
			<li><a title="Next" href="<?php echo add_query_arg($page_query,$paged+1);?>">></a></li>
		<?php } ?>
		<li><a title="Last" href="<?php echo add_query_arg($page_query,$max_pages);?>">>l</a></li>

	
   
	<?php
	echo '</ul>';
	}
}