WP hooks navigation: Home/browse • Actions index • Filters index
To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
4216 | $post_id = (int) $post_id; |
4217 | if ( !$post = get_post( $post_id ) ) |
4218 | return false; |
4219 | if ( !is_array( $imagedata = wp_get_attachment_metadata( $post->ID ) ) ) |
4220 | return false; |
4221 |
|
4222 | $file = get_attached_file( $post->ID ); |
4223 |
|
4224 | if ( !empty($imagedata['thumb']) && ($thumbfile = str_replace(basename($file), $imagedata['thumb'], $file)) && file_exists($thumbfile) ) |
4225 | return apply_filters( 'wp_get_attachment_thumb_file', $thumbfile, $post->ID ); |
4226 | return false; |
4227 | } |
4228 |
|
4229 | /** |
4230 | * Retrieve URL for an attachment thumbnail. |
4231 | * |
4232 | * @since 2.1.0 |
4233 | * |
4234 | * @param int $post_id Attachment ID |