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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 |
|---|---|
| 622 | |
| 623 | /** |
| 624 | * Filters the language codes. |
| 625 | * |
| 626 | * @since MU |
| 627 | * |
| 628 | * @param array $lang_codes Key/value pair of language codes where key is the short version. |
| 629 | * @param string $code A two-letter designation of the language. |
| 630 | */ |
| 631 | $lang_codes = apply_filters( 'lang_codes', $lang_codes, $code ); |
| 632 | return strtr( $code, $lang_codes ); |
| 633 | } |
| 634 | |
| 635 | /** |
| 636 | * Synchronize category and post tag slugs when global terms are enabled. |
| 637 | * |
| 638 | * @since 3.0.0 |
| 639 | * |
| 640 | * @param object $term The term. |