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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 |
|---|---|
| 4020 | * Filters all the smilies. |
| 4021 | * |
| 4022 | * This filter must be added before `smilies_init` is run, as |
| 4023 | * it is normally only run once to setup the smilies regex. |
| 4024 | * |
| 4025 | * @since 4.7.0 |
| 4026 | * |
| 4027 | * @param array $wpsmiliestrans List of the smilies. |
| 4028 | */ |
| 4029 | $wpsmiliestrans = apply_filters( 'smilies', $wpsmiliestrans ); |
| 4030 | |
| 4031 | if ( count( $wpsmiliestrans ) == 0 ) { |
| 4032 | return; |
| 4033 | } |
| 4034 | |
| 4035 | /* |
| 4036 | * NOTE: we sort the smilies in reverse key order. This is to make sure |
| 4037 | * we match the longest possible smilie (:???: vs :?) as the regular |
| 4038 | * expression used below is first-match |