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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 |
|---|---|
| 4086 | * |
| 4087 | * @since 2.7.0 |
| 4088 | * @since 5.4.1 `$unsanitized_postarr` argument added. |
| 4089 | * |
| 4090 | * @param array $data An array of slashed, sanitized, and processed post data. |
| 4091 | * @param array $postarr An array of sanitized (and slashed) but otherwise unmodified post data. |
| 4092 | * @param array $unsanitized_postarr An array of slashed yet *unsanitized* and unprocessed post data as |
| 4093 | * originally passed to wp_insert_post(). |
| 4094 | */ |
| 4095 | $data = apply_filters( 'wp_insert_post_data', $data, $postarr, $unsanitized_postarr ); |
| 4096 | } |
| 4097 | |
| 4098 | $data = wp_unslash( $data ); |
| 4099 | $where = array( 'ID' => $post_ID ); |
| 4100 | |
| 4101 | if ( $update ) { |
| 4102 | /** |
| 4103 | * Fires immediately before an existing post is updated in the database. |
| 4104 | * |