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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 |
|---|---|
| 1921 | |
| 1922 | /** |
| 1923 | * Filter the media upload form action URL. |
| 1924 | * |
| 1925 | * @since 2.6.0 |
| 1926 | * |
| 1927 | * @param string $form_action_url The media upload form action URL. |
| 1928 | * @param string $type The type of media. Default 'file'. |
| 1929 | */ |
| 1930 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 1931 | $form_class = 'media-upload-form type-form validate'; |
| 1932 | |
| 1933 | if ( get_user_setting('uploader') ) |
| 1934 | $form_class .= ' html-uploader'; |
| 1935 | ?> |
| 1936 | |
| 1937 | <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"> |
| 1938 | <?php submit_button( '', 'hidden', 'save', false ); ?> |
| 1939 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| Line | Code |
| 1987 | if ( null === $type ) |
| 1988 | $type = 'image'; |
| 1989 | |
| 1990 | media_upload_header(); |
| 1991 | |
| 1992 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 1993 | |
| 1994 | $form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id"); |
| 1995 | /** This filter is documented in wp-admin/includes/media.php */ |
| 1996 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 1997 | $form_class = 'media-upload-form type-form validate'; |
| 1998 | |
| 1999 | if ( get_user_setting('uploader') ) |
| 2000 | $form_class .= ' html-uploader'; |
| 2001 | ?> |
| 2002 | |
| 2003 | <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"> |
| 2004 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| 2005 | <?php wp_nonce_field('media-form'); ?> |
| Line | Code |
| 2129 | function media_upload_gallery_form($errors) { |
| 2130 | global $redir_tab, $type; |
| 2131 | |
| 2132 | $redir_tab = 'gallery'; |
| 2133 | media_upload_header(); |
| 2134 | |
| 2135 | $post_id = intval($_REQUEST['post_id']); |
| 2136 | $form_action_url = admin_url("media-upload.php?type=$type&tab=gallery&post_id=$post_id"); |
| 2137 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2138 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2139 | $form_class = 'media-upload-form validate'; |
| 2140 | |
| 2141 | if ( get_user_setting('uploader') ) |
| 2142 | $form_class .= ' html-uploader'; |
| 2143 | ?> |
| 2144 | |
| 2145 | <script type="text/javascript"> |
| 2146 | jQuery(function($){ |
| 2147 | var preloaded = $(".media-item.preloaded"); |
| Line | Code |
| 2274 | function media_upload_library_form($errors) { |
| 2275 | global $wpdb, $wp_query, $wp_locale, $type, $tab, $post_mime_types; |
| 2276 | |
| 2277 | media_upload_header(); |
| 2278 | |
| 2279 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 2280 | |
| 2281 | $form_action_url = admin_url("media-upload.php?type=$type&tab=library&post_id=$post_id"); |
| 2282 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2283 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2284 | $form_class = 'media-upload-form validate'; |
| 2285 | |
| 2286 | if ( get_user_setting('uploader') ) |
| 2287 | $form_class .= ' html-uploader'; |
| 2288 | |
| 2289 | $q = $_GET; |
| 2290 | $q['posts_per_page'] = 10; |
| 2291 | $q['paged'] = isset( $q['paged'] ) ? intval( $q['paged'] ) : 0; |
| 2292 | if ( $q['paged'] < 1 ) { |