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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 |
|---|---|
| 3001 | * Filters the arguments passed to WP_Query during an Ajax |
| 3002 | * call for querying attachments. |
| 3003 | * |
| 3004 | * @since 3.7.0 |
| 3005 | * |
| 3006 | * @see WP_Query::parse_query() |
| 3007 | * |
| 3008 | * @param array $query An array of query variables. |
| 3009 | */ |
| 3010 | $query = apply_filters( 'ajax_query_attachments_args', $query ); |
| 3011 | $attachments_query = new WP_Query( $query ); |
| 3012 | |
| 3013 | $posts = array_map( 'wp_prepare_attachment_for_js', $attachments_query->posts ); |
| 3014 | $posts = array_filter( $posts ); |
| 3015 | $total_posts = $attachments_query->found_posts; |
| 3016 | |
| 3017 | if ( $total_posts < 1 ) { |
| 3018 | // Out-of-bounds, run the query again without LIMIT for total count. |
| 3019 | unset( $query['paged'] ); |