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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 |
|---|---|
| 89 | * Associative array of options to pass to {@see wp_text_diff()}. |
| 90 | * |
| 91 | * @type bool $show_split_view True for split view (two columns), false for |
| 92 | * un-split view (single column). Default true. |
| 93 | * } |
| 94 | * @param string $field The current revision field. |
| 95 | * @param WP_Post $compare_from The revision post to compare from. |
| 96 | * @param WP_Post $compare_to The revision post to compare to. |
| 97 | */ |
| 98 | $args = apply_filters( 'revision_text_diff_options', $args, $field, $compare_from, $compare_to ); |
| 99 | |
| 100 | $diff = wp_text_diff( $content_from, $content_to, $args ); |
| 101 | |
| 102 | if ( ! $diff && 'post_title' === $field ) { |
| 103 | // It's a better user experience to still show the Title, even if it didn't change. |
| 104 | // No, you didn't see this. |
| 105 | $diff = '<table class="diff"><colgroup><col class="content diffsplit left"><col class="content diffsplit middle"><col class="content diffsplit right"></colgroup><tbody><tr>'; |
| 106 | $diff .= '<td>' . esc_html( $compare_from->post_title ) . '</td><td></td><td>' . esc_html( $compare_to->post_title ) . '</td>'; |
| 107 | $diff .= '</tr></tbody>'; |