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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 |
|---|---|
| 4157 | * |
| 4158 | * @since 3.9.0 |
| 4159 | * @since 5.4.1 `$unsanitized_postarr` argument added. |
| 4160 | * |
| 4161 | * @param array $data An array of slashed, sanitized, and processed attachment post data. |
| 4162 | * @param array $postarr An array of slashed and sanitized attachment post data, but not processed. |
| 4163 | * @param array $unsanitized_postarr An array of slashed yet *unsanitized* and unprocessed attachment post data |
| 4164 | * as originally passed to wp_insert_post(). |
| 4165 | */ |
| 4166 | $data = apply_filters( 'wp_insert_attachment_data', $data, $postarr, $unsanitized_postarr ); |
| 4167 | } else { |
| 4168 | /** |
| 4169 | * Filters slashed post data just before it is inserted into the database. |
| 4170 | * |
| 4171 | * @since 2.7.0 |
| 4172 | * @since 5.4.1 `$unsanitized_postarr` argument added. |
| 4173 | * |
| 4174 | * @param array $data An array of slashed, sanitized, and processed post data. |
| 4175 | * @param array $postarr An array of sanitized (and slashed) but otherwise unmodified post data. |