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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 |
|---|---|
| 3422 | * Filters all the smilies. |
| 3423 | * |
| 3424 | * This filter must be added before `smilies_init` is run, as |
| 3425 | * it is normally only run once to setup the smilies regex. |
| 3426 | * |
| 3427 | * @since 4.7.0 |
| 3428 | * |
| 3429 | * @param array $wpsmiliestrans List of the smilies. |
| 3430 | */ |
| 3431 | $wpsmiliestrans = apply_filters('smilies', $wpsmiliestrans); |
| 3432 | |
| 3433 | if (count($wpsmiliestrans) == 0) { |
| 3434 | return; |
| 3435 | } |
| 3436 | |
| 3437 | /* |
| 3438 | * NOTE: we sort the smilies in reverse key order. This is to make sure |
| 3439 | * we match the longest possible smilie (:???: vs :?) as the regular |
| 3440 | * expression used below is first-match |