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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 |
---|---|
742 | * The dynamic portion of the hook name, $type, refers to the type |
743 | * of media being sent. |
744 | * |
745 | * @since 3.3.0 |
746 | * |
747 | * @param string $html HTML markup sent to the editor. |
748 | * @param string $src Media source URL. |
749 | * @param string $title Media title. |
750 | */ |
751 | $html = apply_filters( $type . '_send_to_editor_url', $html, esc_url_raw( $src ), $title ); |
752 | } else { |
753 | $align = ''; |
754 | $alt = esc_attr( wp_unslash( $_POST['alt'] ) ); |
755 | if ( isset($_POST['align']) ) { |
756 | $align = esc_attr( wp_unslash( $_POST['align'] ) ); |
757 | $class = " class='align$align'"; |
758 | } |
759 | if ( !empty($src) ) |
760 | $html = "<img src='" . esc_url($src) . "' alt='$alt'$class />"; |