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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 |
|---|---|
| 1996 | |
| 1997 | /** |
| 1998 | * Filters the media upload form action URL. |
| 1999 | * |
| 2000 | * @since 2.6.0 |
| 2001 | * |
| 2002 | * @param string $form_action_url The media upload form action URL. |
| 2003 | * @param string $type The type of media. Default 'file'. |
| 2004 | */ |
| 2005 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2006 | $form_class = 'media-upload-form type-form validate'; |
| 2007 | |
| 2008 | if ( get_user_setting('uploader') ) |
| 2009 | $form_class .= ' html-uploader'; |
| 2010 | ?> |
| 2011 | |
| 2012 | <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"> |
| 2013 | <?php submit_button( '', 'hidden', 'save', false ); ?> |
| 2014 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| Line | Code |
| 2060 | if ( null === $type ) |
| 2061 | $type = 'image'; |
| 2062 | |
| 2063 | media_upload_header(); |
| 2064 | |
| 2065 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 2066 | |
| 2067 | $form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id"); |
| 2068 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2069 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2070 | $form_class = 'media-upload-form type-form validate'; |
| 2071 | |
| 2072 | if ( get_user_setting('uploader') ) |
| 2073 | $form_class .= ' html-uploader'; |
| 2074 | ?> |
| 2075 | |
| 2076 | <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"> |
| 2077 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| 2078 | <?php wp_nonce_field('media-form'); ?> |
| Line | Code |
| 2203 | function media_upload_gallery_form($errors) { |
| 2204 | global $redir_tab, $type; |
| 2205 | |
| 2206 | $redir_tab = 'gallery'; |
| 2207 | media_upload_header(); |
| 2208 | |
| 2209 | $post_id = intval($_REQUEST['post_id']); |
| 2210 | $form_action_url = admin_url("media-upload.php?type=$type&tab=gallery&post_id=$post_id"); |
| 2211 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2212 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2213 | $form_class = 'media-upload-form validate'; |
| 2214 | |
| 2215 | if ( get_user_setting('uploader') ) |
| 2216 | $form_class .= ' html-uploader'; |
| 2217 | ?> |
| 2218 | |
| 2219 | <script type="text/javascript"> |
| 2220 | jQuery(function($){ |
| 2221 | var preloaded = $(".media-item.preloaded"); |
| Line | Code |
| 2355 | function media_upload_library_form($errors) { |
| 2356 | global $wpdb, $wp_query, $wp_locale, $type, $tab, $post_mime_types; |
| 2357 | |
| 2358 | media_upload_header(); |
| 2359 | |
| 2360 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 2361 | |
| 2362 | $form_action_url = admin_url("media-upload.php?type=$type&tab=library&post_id=$post_id"); |
| 2363 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2364 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2365 | $form_class = 'media-upload-form validate'; |
| 2366 | |
| 2367 | if ( get_user_setting('uploader') ) |
| 2368 | $form_class .= ' html-uploader'; |
| 2369 | |
| 2370 | $q = $_GET; |
| 2371 | $q['posts_per_page'] = 10; |
| 2372 | $q['paged'] = isset( $q['paged'] ) ? intval( $q['paged'] ) : 0; |
| 2373 | if ( $q['paged'] < 1 ) { |