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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 |
|---|---|
| 3317 | } else { |
| 3318 | /** |
| 3319 | * Filter slashed post data just before it is inserted into the database. |
| 3320 | * |
| 3321 | * @since 2.7.0 |
| 3322 | * |
| 3323 | * @param array $data An array of slashed post data. |
| 3324 | * @param array $postarr An array of sanitized, but otherwise unmodified post data. |
| 3325 | */ |
| 3326 | $data = apply_filters( 'wp_insert_post_data', $data, $postarr ); |
| 3327 | } |
| 3328 | $data = wp_unslash( $data ); |
| 3329 | $where = array( 'ID' => $post_ID ); |
| 3330 | |
| 3331 | if ( $update ) { |
| 3332 | /** |
| 3333 | * Fires immediately before an existing post is updated in the database. |
| 3334 | * |
| 3335 | * @since 2.5.0 |