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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 |
|---|---|
| 3446 | * Filters all the smilies. |
| 3447 | * |
| 3448 | * This filter must be added before `smilies_init` is run, as |
| 3449 | * it is normally only run once to setup the smilies regex. |
| 3450 | * |
| 3451 | * @since 4.7.0 |
| 3452 | * |
| 3453 | * @param array $wpsmiliestrans List of the smilies. |
| 3454 | */ |
| 3455 | $wpsmiliestrans = apply_filters('smilies', $wpsmiliestrans); |
| 3456 | |
| 3457 | if (count($wpsmiliestrans) == 0) { |
| 3458 | return; |
| 3459 | } |
| 3460 | |
| 3461 | /* |
| 3462 | * NOTE: we sort the smilies in reverse key order. This is to make sure |
| 3463 | * we match the longest possible smilie (:???: vs :?) as the regular |
| 3464 | * expression used below is first-match |