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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 |
|---|---|
| 3059 | * Filters the arguments passed to WP_Query during an Ajax |
| 3060 | * call for querying attachments. |
| 3061 | * |
| 3062 | * @since 3.7.0 |
| 3063 | * |
| 3064 | * @see WP_Query::parse_query() |
| 3065 | * |
| 3066 | * @param array $query An array of query variables. |
| 3067 | */ |
| 3068 | $query = apply_filters( 'ajax_query_attachments_args', $query ); |
| 3069 | $attachments_query = new WP_Query( $query ); |
| 3070 | update_post_parent_caches( $attachments_query->posts ); |
| 3071 | |
| 3072 | $posts = array_map( 'wp_prepare_attachment_for_js', $attachments_query->posts ); |
| 3073 | $posts = array_filter( $posts ); |
| 3074 | $total_posts = $attachments_query->found_posts; |
| 3075 | |
| 3076 | if ( $total_posts < 1 ) { |
| 3077 | // Out-of-bounds, run the query again without LIMIT for total count. |