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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 |
|---|---|
| 4834 | * Filters all the smilies. |
| 4835 | * |
| 4836 | * This filter must be added before `smilies_init` is run, as |
| 4837 | * it is normally only run once to setup the smilies regex. |
| 4838 | * |
| 4839 | * @since 4.7.0 |
| 4840 | * |
| 4841 | * @param string[] $wpsmiliestrans List of the smilies' hexadecimal representations, keyed by their smily code. |
| 4842 | */ |
| 4843 | $wpsmiliestrans = apply_filters( 'smilies', $wpsmiliestrans ); |
| 4844 | |
| 4845 | if ( count( $wpsmiliestrans ) === 0 ) { |
| 4846 | return; |
| 4847 | } |
| 4848 | |
| 4849 | /* |
| 4850 | * NOTE: we sort the smilies in reverse key order. This is to make sure |
| 4851 | * we match the longest possible smilie (:???: vs :?) as the regular |
| 4852 | * expression used below is first-match |