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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 |
|---|---|
| 1889 | |
| 1890 | /** |
| 1891 | * Filter the media upload form action URL. |
| 1892 | * |
| 1893 | * @since 2.6.0 |
| 1894 | * |
| 1895 | * @param string $form_action_url The media upload form action URL. |
| 1896 | * @param string $type The type of media. Default 'file'. |
| 1897 | */ |
| 1898 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 1899 | $form_class = 'media-upload-form type-form validate'; |
| 1900 | |
| 1901 | if ( get_user_setting('uploader') ) |
| 1902 | $form_class .= ' html-uploader'; |
| 1903 | ?> |
| 1904 | |
| 1905 | <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"> |
| 1906 | <?php submit_button( '', 'hidden', 'save', false ); ?> |
| 1907 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| Line | Code |
| 1955 | if ( null === $type ) |
| 1956 | $type = 'image'; |
| 1957 | |
| 1958 | media_upload_header(); |
| 1959 | |
| 1960 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 1961 | |
| 1962 | $form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id"); |
| 1963 | /** This filter is documented in wp-admin/includes/media.php */ |
| 1964 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 1965 | $form_class = 'media-upload-form type-form validate'; |
| 1966 | |
| 1967 | if ( get_user_setting('uploader') ) |
| 1968 | $form_class .= ' html-uploader'; |
| 1969 | ?> |
| 1970 | |
| 1971 | <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"> |
| 1972 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| 1973 | <?php wp_nonce_field('media-form'); ?> |
| Line | Code |
| 2097 | function media_upload_gallery_form($errors) { |
| 2098 | global $redir_tab, $type; |
| 2099 | |
| 2100 | $redir_tab = 'gallery'; |
| 2101 | media_upload_header(); |
| 2102 | |
| 2103 | $post_id = intval($_REQUEST['post_id']); |
| 2104 | $form_action_url = admin_url("media-upload.php?type=$type&tab=gallery&post_id=$post_id"); |
| 2105 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2106 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2107 | $form_class = 'media-upload-form validate'; |
| 2108 | |
| 2109 | if ( get_user_setting('uploader') ) |
| 2110 | $form_class .= ' html-uploader'; |
| 2111 | ?> |
| 2112 | |
| 2113 | <script type="text/javascript"> |
| 2114 | jQuery(function($){ |
| 2115 | var preloaded = $(".media-item.preloaded"); |
| Line | Code |
| 2242 | function media_upload_library_form($errors) { |
| 2243 | global $wpdb, $wp_query, $wp_locale, $type, $tab, $post_mime_types; |
| 2244 | |
| 2245 | media_upload_header(); |
| 2246 | |
| 2247 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 2248 | |
| 2249 | $form_action_url = admin_url("media-upload.php?type=$type&tab=library&post_id=$post_id"); |
| 2250 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2251 | $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); |
| 2252 | $form_class = 'media-upload-form validate'; |
| 2253 | |
| 2254 | if ( get_user_setting('uploader') ) |
| 2255 | $form_class .= ' html-uploader'; |
| 2256 | |
| 2257 | $q = $_GET; |
| 2258 | $q['posts_per_page'] = 10; |
| 2259 | $q['paged'] = isset( $q['paged'] ) ? intval( $q['paged'] ) : 0; |
| 2260 | if ( $q['paged'] < 1 ) { |