IS there a more efficient way?

i have a similar inquiry… a menu will appear in subpages. is there a way to make the code above shorter?

i would like to add in connection with the code above, could it be written in ->
<?php if( is_page(6) || is_page(XXX){?>

wherein XXX are subpages of page(6). what would be the value/code of XXX?

Thank You.

PHP’s in_array() function might be what you are looking for. You could use something like this:

<?php
// create array of page ID’s we want to check for
$page_ids = array(6,12,13,14);

// see if the current page ID is in the array
if(in_array(the_ID(),$page_ids)){
// the_ID() was in the array!
// your code here
}
?>

Also, as at least one of you mentioned, if the $page_ids array is going to contain the children of a specific page ID, you may want to read about WordPress’ get_children() function. I haven’t used that function, and there isn’t much documentation on it, but it may enable you to automatically populate the $page_ids array from the WordPress database.

^it didn;t work T_T

Is your code executing inside The Loop? If not, I think I know why it didn’t work.

‘the_ID()’ function only works if you are inside The Loop. If you are outside The Loop, you’ll have to get the post ID another way.

Try this:

<?php
// get the current page ID
$the_page_id = $post->ID;

// create array of page ID’s we want to check for
$page_ids = array(6,12,13,14);

// see if the current page ID is in the array
if(in_array($the_page_id,$page_ids)){
echo ‘hooray! this is a special id!’;
}
?>

I tested this code on my site and it works.

^ it works. thank you very much. appreciate it ??
one more question. how can i write a range value?
for example:

$page_ids = array(115,123,124,125,126,127,128)

can i write it as

$page_ids = array(115,123:128)

but it didnt work? thanks.

For ranges, use PHP’s built in range() function:

$page_ids = range(123,128);

For a mix of individual ID’s and ranges of ID’s, you just need to figure out the best way to build the $page_ids array (see these PHP functions: array_merge, array_push). For example:

$page_ids = array_merge(range(123,128),array(115,119,309));

Or:

$page_ids = range(123,128);
array_push($page_ids,115,119,309);

THANK YOU! that helps! ??

Great, I’ve been looking around for something similar to the in_categories() call, but for pages. I have a site where I want to call something on a few main pages and their sub-pages. Using the code above, I now just have to define the parent IDs and all sub-pages get included too – fantastic! This really helps when using WP as a CMS and having lots of pages rather than posts.

Thank you.

This is a code that I use to show subpages when on a parent page AND while on a child page. It could easily be changed to echo something else if the page is a child.

<?php
	if($post->post_parent)
		$children = wp_list_pages("title_li=&child_of=".$post->post_parent."&echo=0"); else
		$children = wp_list_pages("title_li=&child_of=".$post->ID."&echo=0");
	if ($children) { ?>

	<ul>
		<?php echo $children; ?>
		<?php } ?>
	</ul>