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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 |
|---|---|
| 1929 | |
| 1930 | /** |
| 1931 | * Filter the media upload form action URL. |
| 1932 | * |
| 1933 | * @since 2.6.0 |
| 1934 | * |
| 1935 | * @param string $form_action_url The media upload form action URL. |
| 1936 | * @param string $type The type of media. Default 'file'. |
| 1937 | */ |
| 1938 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 1939 | $form_class = 'media-upload-form type-form validate'; |
| 1940 | |
| 1941 | if ( get_user_setting('uploader') ) |
| 1942 | $form_class .= ' html-uploader'; |
| 1943 | ?> |
| 1944 | |
| 1945 | <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"> |
| 1946 | <?php submit_button( '', 'hidden', 'save', false ); ?> |
| 1947 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| Line | Code |
| 1993 | if ( null === $type ) |
| 1994 | $type = 'image'; |
| 1995 | |
| 1996 | media_upload_header(); |
| 1997 | |
| 1998 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 1999 | |
| 2000 | $form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id"); |
| 2001 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2002 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2003 | $form_class = 'media-upload-form type-form validate'; |
| 2004 | |
| 2005 | if ( get_user_setting('uploader') ) |
| 2006 | $form_class .= ' html-uploader'; |
| 2007 | ?> |
| 2008 | |
| 2009 | <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"> |
| 2010 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| 2011 | <?php wp_nonce_field('media-form'); ?> |
| Line | Code |
| 2132 | function media_upload_gallery_form($errors) { |
| 2133 | global $redir_tab, $type; |
| 2134 | |
| 2135 | $redir_tab = 'gallery'; |
| 2136 | media_upload_header(); |
| 2137 | |
| 2138 | $post_id = intval($_REQUEST['post_id']); |
| 2139 | $form_action_url = admin_url("media-upload.php?type=$type&tab=gallery&post_id=$post_id"); |
| 2140 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2141 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2142 | $form_class = 'media-upload-form validate'; |
| 2143 | |
| 2144 | if ( get_user_setting('uploader') ) |
| 2145 | $form_class .= ' html-uploader'; |
| 2146 | ?> |
| 2147 | |
| 2148 | <script type="text/javascript"> |
| 2149 | jQuery(function($){ |
| 2150 | var preloaded = $(".media-item.preloaded"); |
| Line | Code |
| 2277 | function media_upload_library_form($errors) { |
| 2278 | global $wpdb, $wp_query, $wp_locale, $type, $tab, $post_mime_types; |
| 2279 | |
| 2280 | media_upload_header(); |
| 2281 | |
| 2282 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 2283 | |
| 2284 | $form_action_url = admin_url("media-upload.php?type=$type&tab=library&post_id=$post_id"); |
| 2285 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2286 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2287 | $form_class = 'media-upload-form validate'; |
| 2288 | |
| 2289 | if ( get_user_setting('uploader') ) |
| 2290 | $form_class .= ' html-uploader'; |
| 2291 | |
| 2292 | $q = $_GET; |
| 2293 | $q['posts_per_page'] = 10; |
| 2294 | $q['paged'] = isset( $q['paged'] ) ? intval( $q['paged'] ) : 0; |
| 2295 | if ( $q['paged'] < 1 ) { |