Check if post has gallery (WordPress)

[cdsanchez]

Is there any way to check if a post has a gallery? I'm using a plugin that adds a jquery thickbox to galleries.. but it loads jQuery and the thickbox scripts on every page even though posts with galleries are the only pages that will use those javascripts. I don't want my users to download something they might not need during their visit

I was thinking of doing something like:

if (do_shortcode('[gallery]')) {
 //load javascripts
}

or

$checkgallery = do_shortcode('[gallery]');
if (!empty($checkgallery) {
 //load javascripts
}

[aaronjj]

try something like this

if (gallery_shortcode($post->ID)){
  //load javascript
} 

[cdsanchez]

Hmm, it works in the templates, but not the plugin file:

function add_lightbox_gallery_jquery() {
global $post;
	if (gallery_shortcode($post->ID) && strpos($_SERVER['REQUEST_URI'], 'admin.php') === false ) {
		wp_enqueue_script( 'jquery');
		wp_enqueue_script('dimensions', '/wp-content/plugins/lightbox-gallery/js/jquery.dimensions.js', array('jquery'));
		wp_enqueue_script('bgtiframe', '/wp-content/plugins/lightbox-gallery/js/jquery.bgiframe.js', array('jquery'));
		wp_enqueue_script('lightbox', '/wp-content/plugins/lightbox-gallery/js/jquery.lightbox.js', array('jquery'));
		wp_enqueue_script('tooltip', '/wp-content/plugins/lightbox-gallery/js/jquery.tooltip.js', array('jquery'));
		wp_enqueue_script('lightbox-gallery', '/wp-content/plugins/lightbox-gallery/lightbox-gallery.js', array('jquery'));
	}
}

[aaronjj]

it looks like an issue with your calls to wp_enqueue_script. since this works

function add_lightbox_gallery_jquery() {
global $post;
    if (gallery_shortcode($post->ID) && strpos($_SERVER['REQUEST_URI'], 'admin.php') === false ) {
  echo '<!-- true -->';
    }
} 

[cdsanchez]

it looks like an issue with your calls to wp_enqueue_script. since this works

function add_lightbox_gallery_jquery() {
global $post;
    if (gallery_shortcode($post->ID) && strpos($_SERVER['REQUEST_URI'], 'admin.php') === false ) {
  echo '<!-- true -->';
    }
} 

Well if it was false it wouldn't even run anything within the if statement, right? I can't figure it out.. I'll try messing with it more tonight

[aaronjj]

Well if it was false it wouldn't even run anything within the if statement, right? I can't figure it out.. I'll try messing with it more tonight

right, the statement evaluates to true. That's why the code I posted echos 'true' on a post with a gallery.

[cdsanchez]

right, the statement evaluates to true. That's why the code I posted echos 'true' on a post with a gallery.

If it isn't true it shouldn't even run the wp_enqueue_script functions, but those scripts are still showing up on pages without a gallery. When I replace it with your snippet of code it displays <!-- TRUE --> on all pages, regardless if they have a gallery or not. Could it be that gallery_shortcode($post->ID) is returning something?

Using WP 2.6.0

function add_lightbox_gallery_jquery() {
 
global $post;
 
    if (gallery_shortcode($post->ID) && strpos($_SERVER['REQUEST_URI'], 'admin.php') === false ) {
 
		wp_enqueue_script( 'jquery');
		wp_enqueue_script('dimensions', '/wp-content/plugins/lightbox-gallery/js/jquery.dimensions.js', array('jquery'));
		wp_enqueue_script('bgtiframe', '/wp-content/plugins/lightbox-gallery/js/jquery.bgiframe.js', array('jquery'));
		wp_enqueue_script('lightbox', '/wp-content/plugins/lightbox-gallery/js/jquery.lightbox.js', array('jquery'));
		wp_enqueue_script('tooltip', '/wp-content/plugins/lightbox-gallery/js/jquery.tooltip.js', array('jquery'));
		wp_enqueue_script('lightbox-gallery', '/wp-content/plugins/lightbox-gallery/lightbox-gallery.js', array('jquery'));
 
    }
 
}

[cdsanchez]

Alright, I did:

function add_lightbox_gallery_jquery() {
 
global $post;
 
    if (gallery_shortcode($post->ID) && strpos($_SERVER['REQUEST_URI'], 'admin.php') === false ) {
 
    echo '<!--' . gallery_shortcode($post->ID) . '-->';
 
    }
 
}

And it returned:

<!--
		<style type='text/css'>
			.gallery {
				margin: auto;
			}
			.gallery-item {
				float: left;
				margin-top: 10px;
				text-align: center;
				width: 33%;			}
			.gallery img {
				border: 2px solid #cfcfcf;
			}
			.gallery-caption {
				margin-left: 0;
			}
		</style>
		<!-- see gallery_shortcode() in wp-includes/media.php -->
		<div class='gallery'><dl class='gallery-item'>
			<dt class='gallery-icon'>
				<a href='http://gameviper.com/ps3/resistance-2-release-date-collectors-edition-global-multiplayer-and-co-op-beta-confirmed/attachment/resistancethumb' title='resistancethumb'><img src="http://gameviper.com/wp-content/uploads/2008/09/resistancethumb.jpg" width="77" height="100" class="attachment-thumbnail" alt="" /></a>
			</dt></dl>
			<br style='clear: both;' />
		</div>
-->

gallery_shortcode($post->ID) will return something if there are images attached to the post, but regardless of whether the [gallery] shortcode was used in the post. Since I use images in pretty much every post, it will always return false

[aaronjj]

gallery_shortcode($post->ID) will return something if there are images attached to the post, but regardless of whether the [gallery] shortcode was used in the post.

Oops, that won't work.

I just tried that first piece of code you pasted, if (do_shortcode('[gallery]')), and it worked for me. What was the problem with using that?

[cdsanchez]

Oops, that won't work.

I just tried that first piece of code you pasted, if (do_shortcode('[gallery]')), and it worked for me. What was the problem with using that?

It gave me some php error the last time I tried it, I'll try again tonight though. But I think it will give the same result as gallery_shortcode($post->ID) since I add at least one image to every post.

One thing I could do is make a function that goes through the post contents and searches for "[gallery]".. an awful lot to do just to get rid of those scripts

It usually wouldn't bug me that much, but it loads 8 javascripts just for this one feature that I seldom use. If it was all in one file it wouldn't bug me, but it just adds another possible issue by making the browser load 8 more files (and it can only load 2 scripts in parallel)

EDIT: Yeah, do_shortcode('[gallery]') does pretty much the same thing as gallery_shortcode($post->ID)

[aaronjj]

hmm... I would think there would be an easier way to do this. $array = shortcode_parse_atts($post->post_content); will give you an array you can itterate through to check for [gallery]

Best of luck.