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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
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 |
---|---|
3252 | if ( !$fields ) { |
3253 | // Allow these to be versioned |
3254 | $fields = array( |
3255 | 'post_title' => __( 'Title' ), |
3256 | 'post_content' => __( 'Content' ), |
3257 | 'post_excerpt' => __( 'Excerpt' ), |
3258 | ); |
3259 |
|
3260 | // Runs only once |
3261 | $fields = apply_filters( '_wp_post_revision_fields', $fields ); |
3262 |
|
3263 | // WP uses these internally either in versioning or elsewhere - they cannot be versioned |
3264 | foreach ( array( 'ID', 'post_name', 'post_parent', 'post_date', 'post_date_gmt', 'post_status', 'post_type', 'comment_count', 'post_author' ) as $protect ) |
3265 | unset( $fields[$protect] ); |
3266 | } |
3267 |
|
3268 | if ( !is_array($post) ) |
3269 | return $fields; |
3270 |
|