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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 |
|---|---|
| 1601 | * @param unknown_type $errors |
| 1602 | * @param unknown_type $id |
| 1603 | */ |
| 1604 | function media_upload_type_form($type = 'file', $errors = null, $id = null) { |
| 1605 | media_upload_header(); |
| 1606 | |
| 1607 | $post_id = isset( $_REQUEST['post_id'] )? intval( $_REQUEST['post_id'] ) : 0; |
| 1608 | |
| 1609 | $form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id"); |
| 1610 | $form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type); |
| 1611 | ?> |
| 1612 | |
| 1613 | <form enctype="multipart/form-data" method="post" action="<?php echo esc_attr($form_action_url); ?>" class="media-upload-form type-form validate" id="<?php echo $type; ?>-form"> |
| 1614 | <?php submit_button( '', 'hidden', 'save', false ); ?> |
| 1615 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| 1616 | <?php wp_nonce_field('media-form'); ?> |
| 1617 | |
| 1618 | <h3 class="media-title"><?php _e('Add media files from your computer'); ?></h3> |
| 1619 | |
| Line | Code |
| 1659 | * @param unknown_type $errors |
| 1660 | * @param unknown_type $id |
| 1661 | */ |
| 1662 | function media_upload_type_url_form($type = 'file', $errors = null, $id = null) { |
| 1663 | media_upload_header(); |
| 1664 | |
| 1665 | $post_id = intval($_REQUEST['post_id']); |
| 1666 | |
| 1667 | $form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id"); |
| 1668 | $form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type); |
| 1669 | |
| 1670 | $callback = "type_url_form_$type"; |
| 1671 | ?> |
| 1672 | |
| 1673 | <form enctype="multipart/form-data" method="post" action="<?php echo esc_attr($form_action_url); ?>" class="media-upload-form type-form validate" id="<?php echo $type; ?>-form"> |
| 1674 | <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> |
| 1675 | <?php wp_nonce_field('media-form'); ?> |
| 1676 | |
| 1677 | <?php if ( is_callable($callback) ) { ?> |
| Line | Code |
| 1777 | */ |
| 1778 | function media_upload_gallery_form($errors) { |
| 1779 | global $redir_tab, $type; |
| 1780 | |
| 1781 | $redir_tab = 'gallery'; |
| 1782 | media_upload_header(); |
| 1783 | |
| 1784 | $post_id = intval($_REQUEST['post_id']); |
| 1785 | $form_action_url = admin_url("media-upload.php?type=$type&tab=gallery&post_id=$post_id"); |
| 1786 | $form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type); |
| 1787 | ?> |
| 1788 | |
| 1789 | <script type="text/javascript"> |
| 1790 | <!-- |
| 1791 | jQuery(function($){ |
| 1792 | var preloaded = $(".media-item.preloaded"); |
| 1793 | if ( preloaded.length > 0 ) { |
| 1794 | preloaded.each(function(){prepareMediaItem({id:this.id.replace(/[^0-9]/g, '')},'');}); |
| 1795 | updateMediaForm(); |
| Line | Code |
| 1919 | */ |
| 1920 | function media_upload_library_form($errors) { |
| 1921 | global $wpdb, $wp_query, $wp_locale, $type, $tab, $post_mime_types; |
| 1922 | |
| 1923 | media_upload_header(); |
| 1924 | |
| 1925 | $post_id = intval($_REQUEST['post_id']); |
| 1926 | |
| 1927 | $form_action_url = admin_url("media-upload.php?type=$type&tab=library&post_id=$post_id"); |
| 1928 | $form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type); |
| 1929 | |
| 1930 | $_GET['paged'] = isset( $_GET['paged'] ) ? intval($_GET['paged']) : 0; |
| 1931 | if ( $_GET['paged'] < 1 ) |
| 1932 | $_GET['paged'] = 1; |
| 1933 | $start = ( $_GET['paged'] - 1 ) * 10; |
| 1934 | if ( $start < 1 ) |
| 1935 | $start = 0; |
| 1936 | add_filter( 'post_limits', create_function( '$a', "return 'LIMIT $start, 10';" ) ); |
| 1937 | |