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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 |
|---|---|
| 284 | * @since Twenty Fourteen 1.0 |
| 285 | * |
| 286 | * @param array $dimensions { |
| 287 | * An array of height and width dimensions. |
| 288 | * |
| 289 | * @type int $height Height of the image in pixels. Default 810. |
| 290 | * @type int $width Width of the image in pixels. Default 810. |
| 291 | * } |
| 292 | */ |
| 293 | $attachment_size = apply_filters( 'twentyfourteen_attachment_size', array( 810, 810 ) ); |
| 294 | $next_attachment_url = wp_get_attachment_url(); |
| 295 | |
| 296 | /* |
| 297 | * Grab the IDs of all the image attachments in a gallery so we can get the URL |
| 298 | * of the next adjacent image in a gallery, or the first image (if we're |
| 299 | * looking at the last image in a gallery), or, in a gallery of one, just the |
| 300 | * link to that image file. |
| 301 | */ |
| 302 | $attachment_ids = get_posts( array( |