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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 |
|---|---|
| 1586 | * @param integer $id |
| 1587 | */ |
| 1588 | function media_upload_type_form($type = 'file', $errors = null, $id = null) { |
| 1589 | |
| 1590 | media_upload_header(); |
| 1591 | |
| 1592 | $post_id = isset( $_REQUEST['post_id'] )? intval( $_REQUEST['post_id'] ) : 0; |
| 1593 | |
| 1594 | $form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id"); |
| 1595 | $form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type); |
| 1596 | $form_class = 'media-upload-form type-form validate'; |
| 1597 | |
| 1598 | if ( get_user_setting('uploader') ) |
| 1599 | $form_class .= ' html-uploader'; |
| 1600 | ?> |
| 1601 | |
| 1602 | <form enctype="multipart/form-data" method="post" action="<?php echo esc_attr($form_action_url); ?>" class="<?php echo $form_class; ?>" id="<?php echo $type; ?>-form"> |
| 1603 | <?php submit_button( '', 'hidden', 'save', false ); ?> |
| 1604 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| Line | Code |
| 1651 | function media_upload_type_url_form($type = null, $errors = null, $id = null) { |
| 1652 | if ( null === $type ) |
| 1653 | $type = 'image'; |
| 1654 | |
| 1655 | media_upload_header(); |
| 1656 | |
| 1657 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 1658 | |
| 1659 | $form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id"); |
| 1660 | $form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type); |
| 1661 | $form_class = 'media-upload-form type-form validate'; |
| 1662 | |
| 1663 | if ( get_user_setting('uploader') ) |
| 1664 | $form_class .= ' html-uploader'; |
| 1665 | ?> |
| 1666 | |
| 1667 | <form enctype="multipart/form-data" method="post" action="<?php echo esc_attr($form_action_url); ?>" class="<?php echo $form_class; ?>" id="<?php echo $type; ?>-form"> |
| 1668 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| 1669 | <?php wp_nonce_field('media-form'); ?> |
| Line | Code |
| 1780 | */ |
| 1781 | function media_upload_gallery_form($errors) { |
| 1782 | global $redir_tab, $type; |
| 1783 | |
| 1784 | $redir_tab = 'gallery'; |
| 1785 | media_upload_header(); |
| 1786 | |
| 1787 | $post_id = intval($_REQUEST['post_id']); |
| 1788 | $form_action_url = admin_url("media-upload.php?type=$type&tab=gallery&post_id=$post_id"); |
| 1789 | $form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type); |
| 1790 | $form_class = 'media-upload-form validate'; |
| 1791 | |
| 1792 | if ( get_user_setting('uploader') ) |
| 1793 | $form_class .= ' html-uploader'; |
| 1794 | ?> |
| 1795 | |
| 1796 | <script type="text/javascript"> |
| 1797 | <!-- |
| 1798 | jQuery(function($){ |
| Line | Code |
| 1926 | */ |
| 1927 | function media_upload_library_form($errors) { |
| 1928 | global $wpdb, $wp_query, $wp_locale, $type, $tab, $post_mime_types; |
| 1929 | |
| 1930 | media_upload_header(); |
| 1931 | |
| 1932 | $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0; |
| 1933 | |
| 1934 | $form_action_url = admin_url("media-upload.php?type=$type&tab=library&post_id=$post_id"); |
| 1935 | $form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type); |
| 1936 | $form_class = 'media-upload-form validate'; |
| 1937 | |
| 1938 | if ( get_user_setting('uploader') ) |
| 1939 | $form_class .= ' html-uploader'; |
| 1940 | |
| 1941 | $_GET['paged'] = isset( $_GET['paged'] ) ? intval($_GET['paged']) : 0; |
| 1942 | if ( $_GET['paged'] < 1 ) |
| 1943 | $_GET['paged'] = 1; |
| 1944 | $start = ( $_GET['paged'] - 1 ) * 10; |