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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 |
|---|---|
| 3177 | * |
| 3178 | * @since 2.3.0 |
| 3179 | * |
| 3180 | * @param mixed $value Value of the prefixed post field. |
| 3181 | * @param int $post_id Post ID. |
| 3182 | * @param string $context Context for how to sanitize the field. |
| 3183 | * Accepts 'raw', 'edit', 'db', 'display', |
| 3184 | * 'attribute', or 'js'. Default 'display'. |
| 3185 | */ |
| 3186 | $value = apply_filters( "{$field}", $value, $post_id, $context ); |
| 3187 | } else { |
| 3188 | /** |
| 3189 | * Filters the value of a specific post field for display. |
| 3190 | * |
| 3191 | * Only applied to post fields name which is *not* prefixed with `post_`. |
| 3192 | * |
| 3193 | * The dynamic portion of the hook name, `$field`, refers to the post |
| 3194 | * field name. Possible filter names include: |
| 3195 | * |