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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 |
|---|---|
| 3089 | * - `pinged_pre` |
| 3090 | * - `guid_pre` |
| 3091 | * - `menu_order_pre` |
| 3092 | * - `comment_count_pre` |
| 3093 | * |
| 3094 | * @since 2.3.0 |
| 3095 | * |
| 3096 | * @param mixed $value Value of the post field. |
| 3097 | */ |
| 3098 | $value = apply_filters( "{$field}_pre", $value ); |
| 3099 | } |
| 3100 | } else { |
| 3101 | |
| 3102 | // Use display filters by default. |
| 3103 | if ( $prefixed ) { |
| 3104 | |
| 3105 | /** |
| 3106 | * Filters the value of a specific post field for display. |
| 3107 | * |