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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 |
|---|---|
| 3173 | } else { |
| 3174 | /** |
| 3175 | * Filter slashed post data just before it is inserted into the database. |
| 3176 | * |
| 3177 | * @since 2.7.0 |
| 3178 | * |
| 3179 | * @param array $data An array of slashed post data. |
| 3180 | * @param array $postarr An array of sanitized, but otherwise unmodified post data. |
| 3181 | */ |
| 3182 | $data = apply_filters( 'wp_insert_post_data', $data, $postarr ); |
| 3183 | } |
| 3184 | $data = wp_unslash( $data ); |
| 3185 | $where = array( 'ID' => $post_ID ); |
| 3186 | |
| 3187 | if ( $update ) { |
| 3188 | /** |
| 3189 | * Fires immediately before an existing post is updated in the database. |
| 3190 | * |
| 3191 | * @since 2.5.0 |