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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 |
|---|---|
| 4675 | * Filters all the smilies. |
| 4676 | * |
| 4677 | * This filter must be added before `smilies_init` is run, as |
| 4678 | * it is normally only run once to setup the smilies regex. |
| 4679 | * |
| 4680 | * @since 4.7.0 |
| 4681 | * |
| 4682 | * @param string[] $wpsmiliestrans List of the smilies' hexadecimal representations, keyed by their smily code. |
| 4683 | */ |
| 4684 | $wpsmiliestrans = apply_filters( 'smilies', $wpsmiliestrans ); |
| 4685 | |
| 4686 | if ( count( $wpsmiliestrans ) == 0 ) { |
| 4687 | return; |
| 4688 | } |
| 4689 | |
| 4690 | /* |
| 4691 | * NOTE: we sort the smilies in reverse key order. This is to make sure |
| 4692 | * we match the longest possible smilie (:???: vs :?) as the regular |
| 4693 | * expression used below is first-match |