Joseph

Sorry, my mistake…

I forgot to remove the code in footer.php so I thought the hook works but it indeed doesn’t.

I’ve been testing it and even though the if statement condition is correct, enqueue only works when I remove the strpos part from the condition. I’m stumped…

That’s odd.. I’ve tried it with the plugin (WP-prettyPhoto) installed and the script is been correctly enqueued according to the condition.

Do you mind showing me an example page?

Ok, try this:

function my_prettyphoto_script($content) {
	if ((is_single() || is_page()) && (strpos($content, 'rel="prettyPhoto') > 1)) {
		wp_enqueue_script( 'prettyPhotojs', get_bloginfo('template_directory').'/includes/js/jquery.prettyPhoto.js', array( 'jquery' ), '', true );
	}
	return $content;
}
add_filter('the_content', 'my_prettyphoto_script', 100, 1);

Adding a condition to enqueue prettyphoto script after the rels have been added through the_content filter.

Edit: I’ve tried the plugin and I left out the closing double quote in 'rel="prettyphoto' because it adds the post ID after it.

I had assume your condition was correct from the start so it’s never crossed my mind but I’m pretty sure the reason it’s not working is because rel="prettyPhoto" doesn’t exist in post_content. The plugin should be adding it in through the_content filter everytime the page generates.

Does the plugin add rel="prettyPhoto" to every <img> tag? If so, you can just check for <img> tags with strpos($post->post_content, '<img') !== false

Well, like I’ve said, if using the following code after wp_footer(); in footer.php (not in a function) doesn’t work then it means your condition is wrong.

<?php if ((is_single() || is_page()) && (strpos($post->post_content, 'rel="prettyPhoto"') > 1)) { ?>
<script type="text/javascript" src="<?php bloginfo('template_directory'); ?>/includes/js/jquery.prettyPhoto.js"></script>
<?php } ?>

I don’t use prettyphoto so I changed 'rel="prettyPhoto"' to something else and tried it on my test blog. It works fine. The js code is displaying in the source code of the desired page.

Then that means there’s something wrong with your if statement condition.

You wrote

Only for content that have “rel=’prettyPhoto'” inside.

but you using double quotes "prettyPhoto" in the code?

Just add a link in gallery.php template and make the file name dynamic depending on how you name them.

Resize your images to the desire size before uploading or use NGG’s automatic resize function set under the images setting.

Edit: You could try setting CSS width and height.

Try checking $wp_scripts global variable.

So doing a simple if statement in the footer doesn’t work? Did you copy paste exactly what I posted because I just noticed you have /includes/ in one of the code you’ve posted?

If doing the if statement without using wp_enqueue_script doesn’t work then that would suggest the condition is wrong.

If the hooks doesn’t work, you could just do the if statement in your footer.php after wp_footer().

<?php if ((is_single() || is_page()) && (strpos($post->post_content, 'rel="prettyPhoto"') > 1)) { ?>
<script type="text/javascript" src="<?php bloginfo('template_directory'); ?>/js/jquery.prettyPhoto.js"></script>
<?php } ?>

Have you tried using the template_redirect hook instead of wp_print_scripts?

https://codex.www.ads-software.com/Function_Reference/wp_enqueue_script says to not use wp_print_scripts.

This function will not work if it is called from a wp_head action, as the <script> tags are output before wp_head runs. Instead, call wp_enqueue_script from an init action function (to load it in all pages), template_redirect (to load it in public pages only), or admin_print_scripts (for admin pages only). Do not use wp_print_scripts

You need to hook it to template_redirect. init action won’t work for your case because it’s too early in the process so the conditional tags won’t work and $post is not yet set.

Are you using that code in a function? If you are, did you declare global $post;?

This:

if ((is_single() || is_page()) && (strpos($post->post_content, 'rel="prettyPhoto"') > 1)) { ?>
<script type="text/javascript" src="<?php bloginfo('template_directory'); ?>/js/jquery.prettyPhoto.js"></script>
<?php }

In your original code, $pretty is always null.

Try

$pretty = ($pretty || ((is_single() || is_page()) &&
 (strpos($post->post_content, 'rel="prettyPhoto"') > 1)));
  if ($pretty) { ?>
  <script type="text/javascript" src="<?php bloginfo('template_directory'); ?>/js/jquery.prettyPhoto.js"></script>
  <?php }