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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.
| Line | Code |
|---|---|
| 803 | * |
| 804 | * @since 2.8.0 |
| 805 | * |
| 806 | * @param string $html HTML markup sent to the editor for an image. |
| 807 | * @param string $src Image source URL. |
| 808 | * @param string $alt Image alternate, or alt, text. |
| 809 | * @param string $align The image alignment. Default 'alignnone'. Possible values include |
| 810 | * 'alignleft', 'aligncenter', 'alignright', 'alignnone'. |
| 811 | */ |
| 812 | $html = apply_filters( 'image_send_to_editor_url', $html, esc_url_raw( $src ), $alt, $align ); |
| 813 | } |
| 814 | |
| 815 | return media_send_to_editor($html); |
| 816 | } |
| 817 | |
| 818 | if ( isset( $_POST['save'] ) ) { |
| 819 | $errors['upload_notice'] = __('Saved.'); |
| 820 | wp_enqueue_script( 'admin-gallery' ); |
| 821 | return wp_iframe( 'media_upload_gallery_form', $errors ); |