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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 3 times in this file.
Line | Code |
---|---|
159 | <span class="alignright"><?php printf( __('Newer: %s'), wp_post_revision_title( $right_revision ) ); ?></span> |
160 | </th> |
161 | </tr> |
162 | <?php endif; |
163 |
|
164 | // use get_post_to_edit filters? |
165 | $identical = true; |
166 | foreach ( _wp_post_revision_fields() as $field => $field_title ) : |
167 | if ( 'diff' == $action ) { |
168 | $left_content = apply_filters( "_wp_post_revision_field_$field", $left_revision->$field, $field ); |
169 | $right_content = apply_filters( "_wp_post_revision_field_$field", $right_revision->$field, $field ); |
170 | if ( !$content = wp_text_diff( $left_content, $right_content ) ) |
171 | continue; // There is no difference between left and right |
172 | $identical = false; |
173 | } else { |
174 | add_filter( "_wp_post_revision_field_$field", 'htmlspecialchars' ); |
175 | $content = apply_filters( "_wp_post_revision_field_$field", $revision->$field, $field ); |
176 | } |
177 | ?> |
178 |
|
179 | <tr id="revision-field-<?php echo $field; ?>"> |
180 | <th scope="row"><?php echo esc_html( $field_title ); ?></th> |
181 | <td><div class="pre"><?php echo $content; ?></div></td> |
182 | </tr> |
183 |
|
184 | <?php |