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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.
This hook occurs 4 times in this file.
| Line | Code |
|---|---|
| 1975 | |
| 1976 | /** |
| 1977 | * Filter the media upload form action URL. |
| 1978 | * |
| 1979 | * @since 2.6.0 |
| 1980 | * |
| 1981 | * @param string $form_action_url The media upload form action URL. |
| 1982 | * @param string $type The type of media. Default 'file'. |
| 1983 | */ |
| 1984 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 1985 | $form_class = 'media-upload-form type-form validate'; |
| 1986 | |
| 1987 | if ( get_user_setting('uploader') ) |
| 1988 | $form_class .= ' html-uploader'; |
| 1989 | ?> |
| 1990 | |
| 1991 | <form enctype="multipart/form-data" method="post" action="<?php echo esc_url( $form_action_url ); ?>" class="<?php echo $form_class; ?>" id="<?php echo $type; ?>-form"> |
| 1992 | <?php submit_button( '', 'hidden', 'save', false ); ?> |
| 1993 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| Line | Code |
| 2039 | if ( null === $type ) |
| 2040 | $type = 'image'; |
| 2041 | |
| 2042 | media_upload_header(); |
| 2043 | |
| 2044 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 2045 | |
| 2046 | $form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id"); |
| 2047 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2048 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2049 | $form_class = 'media-upload-form type-form validate'; |
| 2050 | |
| 2051 | if ( get_user_setting('uploader') ) |
| 2052 | $form_class .= ' html-uploader'; |
| 2053 | ?> |
| 2054 | |
| 2055 | <form enctype="multipart/form-data" method="post" action="<?php echo esc_url( $form_action_url ); ?>" class="<?php echo $form_class; ?>" id="<?php echo $type; ?>-form"> |
| 2056 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| 2057 | <?php wp_nonce_field('media-form'); ?> |
| Line | Code |
| 2182 | function media_upload_gallery_form($errors) { |
| 2183 | global $redir_tab, $type; |
| 2184 | |
| 2185 | $redir_tab = 'gallery'; |
| 2186 | media_upload_header(); |
| 2187 | |
| 2188 | $post_id = intval($_REQUEST['post_id']); |
| 2189 | $form_action_url = admin_url("media-upload.php?type=$type&tab=gallery&post_id=$post_id"); |
| 2190 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2191 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2192 | $form_class = 'media-upload-form validate'; |
| 2193 | |
| 2194 | if ( get_user_setting('uploader') ) |
| 2195 | $form_class .= ' html-uploader'; |
| 2196 | ?> |
| 2197 | |
| 2198 | <script type="text/javascript"> |
| 2199 | jQuery(function($){ |
| 2200 | var preloaded = $(".media-item.preloaded"); |
| Line | Code |
| 2334 | function media_upload_library_form($errors) { |
| 2335 | global $wpdb, $wp_query, $wp_locale, $type, $tab, $post_mime_types; |
| 2336 | |
| 2337 | media_upload_header(); |
| 2338 | |
| 2339 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 2340 | |
| 2341 | $form_action_url = admin_url("media-upload.php?type=$type&tab=library&post_id=$post_id"); |
| 2342 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2343 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2344 | $form_class = 'media-upload-form validate'; |
| 2345 | |
| 2346 | if ( get_user_setting('uploader') ) |
| 2347 | $form_class .= ' html-uploader'; |
| 2348 | |
| 2349 | $q = $_GET; |
| 2350 | $q['posts_per_page'] = 10; |
| 2351 | $q['paged'] = isset( $q['paged'] ) ? intval( $q['paged'] ) : 0; |
| 2352 | if ( $q['paged'] < 1 ) { |