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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 |
|---|---|
| 3226 | * |
| 3227 | * @since 2.3.0 |
| 3228 | * |
| 3229 | * @param mixed $value Value of the prefixed post field. |
| 3230 | * @param int $post_id Post ID. |
| 3231 | * @param string $context Context for how to sanitize the field. |
| 3232 | * Accepts 'raw', 'edit', 'db', 'display', |
| 3233 | * 'attribute', or 'js'. Default 'display'. |
| 3234 | */ |
| 3235 | $value = apply_filters( "{$field}", $value, $post_id, $context ); |
| 3236 | } else { |
| 3237 | /** |
| 3238 | * Filters the value of a specific post field for display. |
| 3239 | * |
| 3240 | * Only applied to post fields name which is *not* prefixed with `post_`. |
| 3241 | * |
| 3242 | * The dynamic portion of the hook name, `$field`, refers to the post |
| 3243 | * field name. Possible filter names include: |
| 3244 | * |