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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 |
---|---|
868 | * |
869 | * @since 2.8.0 |
870 | * |
871 | * @param string $html HTML markup sent to the editor for an image. |
872 | * @param string $src Image source URL. |
873 | * @param string $alt Image alternate, or alt, text. |
874 | * @param string $align The image alignment. Default 'alignnone'. Possible values include |
875 | * 'alignleft', 'aligncenter', 'alignright', 'alignnone'. |
876 | */ |
877 | $html = apply_filters( 'image_send_to_editor_url', $html, esc_url_raw( $src ), $alt, $align ); |
878 | } |
879 |
|
880 | return media_send_to_editor( $html ); |
881 | } |
882 |
|
883 | if ( isset( $_POST['save'] ) ) { |
884 | $errors['upload_notice'] = __( 'Saved.' ); |
885 | wp_enqueue_script( 'admin-gallery' ); |
886 | return wp_iframe( 'media_upload_gallery_form', $errors ); |