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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 |
|---|---|
| 769 | * The dynamic portion of the hook name, `$type`, refers to the type |
| 770 | * of media being sent. |
| 771 | * |
| 772 | * @since 3.3.0 |
| 773 | * |
| 774 | * @param string $html HTML markup sent to the editor. |
| 775 | * @param string $src Media source URL. |
| 776 | * @param string $title Media title. |
| 777 | */ |
| 778 | $html = apply_filters( $type . '_send_to_editor_url', $html, esc_url_raw( $src ), $title ); |
| 779 | } else { |
| 780 | $align = ''; |
| 781 | $alt = esc_attr( wp_unslash( $_POST['alt'] ) ); |
| 782 | if ( isset($_POST['align']) ) { |
| 783 | $align = esc_attr( wp_unslash( $_POST['align'] ) ); |
| 784 | $class = " class='align$align'"; |
| 785 | } |
| 786 | if ( !empty($src) ) |
| 787 | $html = "<img src='" . esc_url($src) . "' alt='$alt'$class />"; |