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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 |
|---|---|
| 2002 | |
| 2003 | /** |
| 2004 | * Filters the media upload form action URL. |
| 2005 | * |
| 2006 | * @since 2.6.0 |
| 2007 | * |
| 2008 | * @param string $form_action_url The media upload form action URL. |
| 2009 | * @param string $type The type of media. Default 'file'. |
| 2010 | */ |
| 2011 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2012 | $form_class = 'media-upload-form type-form validate'; |
| 2013 | |
| 2014 | if ( get_user_setting('uploader') ) |
| 2015 | $form_class .= ' html-uploader'; |
| 2016 | ?> |
| 2017 | |
| 2018 | <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"> |
| 2019 | <?php submit_button( '', 'hidden', 'save', false ); ?> |
| 2020 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| Line | Code |
| 2066 | if ( null === $type ) |
| 2067 | $type = 'image'; |
| 2068 | |
| 2069 | media_upload_header(); |
| 2070 | |
| 2071 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 2072 | |
| 2073 | $form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id"); |
| 2074 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2075 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2076 | $form_class = 'media-upload-form type-form validate'; |
| 2077 | |
| 2078 | if ( get_user_setting('uploader') ) |
| 2079 | $form_class .= ' html-uploader'; |
| 2080 | ?> |
| 2081 | |
| 2082 | <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"> |
| 2083 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| 2084 | <?php wp_nonce_field('media-form'); ?> |
| Line | Code |
| 2209 | function media_upload_gallery_form($errors) { |
| 2210 | global $redir_tab, $type; |
| 2211 | |
| 2212 | $redir_tab = 'gallery'; |
| 2213 | media_upload_header(); |
| 2214 | |
| 2215 | $post_id = intval($_REQUEST['post_id']); |
| 2216 | $form_action_url = admin_url("media-upload.php?type=$type&tab=gallery&post_id=$post_id"); |
| 2217 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2218 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2219 | $form_class = 'media-upload-form validate'; |
| 2220 | |
| 2221 | if ( get_user_setting('uploader') ) |
| 2222 | $form_class .= ' html-uploader'; |
| 2223 | ?> |
| 2224 | |
| 2225 | <script type="text/javascript"> |
| 2226 | jQuery(function($){ |
| 2227 | var preloaded = $(".media-item.preloaded"); |
| Line | Code |
| 2361 | function media_upload_library_form($errors) { |
| 2362 | global $wpdb, $wp_query, $wp_locale, $type, $tab, $post_mime_types; |
| 2363 | |
| 2364 | media_upload_header(); |
| 2365 | |
| 2366 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 2367 | |
| 2368 | $form_action_url = admin_url("media-upload.php?type=$type&tab=library&post_id=$post_id"); |
| 2369 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2370 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2371 | $form_class = 'media-upload-form validate'; |
| 2372 | |
| 2373 | if ( get_user_setting('uploader') ) |
| 2374 | $form_class .= ' html-uploader'; |
| 2375 | |
| 2376 | $q = $_GET; |
| 2377 | $q['posts_per_page'] = 10; |
| 2378 | $q['paged'] = isset( $q['paged'] ) ? intval( $q['paged'] ) : 0; |
| 2379 | if ( $q['paged'] < 1 ) { |