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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 |
|---|---|
| 3897 | } else { |
| 3898 | /** |
| 3899 | * Filters slashed post data just before it is inserted into the database. |
| 3900 | * |
| 3901 | * @since 2.7.0 |
| 3902 | * |
| 3903 | * @param array $data An array of slashed post data. |
| 3904 | * @param array $postarr An array of sanitized, but otherwise unmodified post data. |
| 3905 | */ |
| 3906 | $data = apply_filters( 'wp_insert_post_data', $data, $postarr ); |
| 3907 | } |
| 3908 | $data = wp_unslash( $data ); |
| 3909 | $where = array( 'ID' => $post_ID ); |
| 3910 | |
| 3911 | if ( $update ) { |
| 3912 | /** |
| 3913 | * Fires immediately before an existing post is updated in the database. |
| 3914 | * |
| 3915 | * @since 2.5.0 |