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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 73 | * |
| 74 | * @since 3.6.0 |
| 75 | * |
| 76 | * @param string $revision_field The current revision field to compare to or from. |
| 77 | * @param string $field The current revision field. |
| 78 | * @param WP_Post $compare_from The revision post object to compare to or from. |
| 79 | * @param string $context The context of whether the current revision is the old |
| 80 | * or the new one. Values are 'to' or 'from'. |
| 81 | */ |
| 82 | $content_from = $compare_from ? apply_filters( "_wp_post_revision_field_{$field}", $compare_from->$field, $field, $compare_from, 'from' ) : ''; |
| 83 | |
| 84 | /** This filter is documented in wp-admin/includes/revision.php */ |
| 85 | $content_to = apply_filters( "_wp_post_revision_field_{$field}", $compare_to->$field, $field, $compare_to, 'to' ); |
| 86 | |
| 87 | $args = array( |
| 88 | 'show_split_view' => true, |
| 89 | ); |
| 90 | |
| 91 | /** |
| 92 | * Filters revisions text diff options. |
| 93 | * |
| 94 | * Filters the options passed to wp_text_diff() when viewing a post revision. |