Check if post/page has gallery?

I’d like to run some code only if a gallery (inserted with the shortcode) has been inserted into a post/page. I did the following:

gallery_shortcode($post->ID) ?
$gallery = 1 : $gallery = 0;

However, this always sets $gallery = 0 whether there’s a gallery or not. Am I using this incorrectly?

Answers:

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Method 1

try :

if (strpos($post->post_content,'[gallery') === false){
  $gallery = 0;
}else{
  $gallery = 1;
}

Method 2

My iteration on the suggested solution here, is the following function in my theme’s functions.php:

function has_gallery($post_id = false) {
    if (!$post_id) {
        global $post;
    } else {
        $post = get_post($post_id);
    }
    return ( strpos($post->post_content,'[gallery') !== false); 
}

Which I can then call in a template file (doesn’t care about The Loop):

$has_gallery = has_gallery($post_id) ? true : false;

or more direct:

has_gallery($post_id); //will evaluate to true/false

$post_id is optional, the following will only work within The Loop:

has_gallery();

Method 3

How about simply using the get_post_gallery() function. This is exactly the way, most themes are checking if a post has a gallery to print the correct body CSS classes:

if ( get_post_gallery() ) {
    // run your code in here
}

P.S. I really don’t like solutions that search the whole content for anything, even if string functions are typically quite fast in PHP, it’s still a huge performance overhead.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0