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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 |
|---|---|
| 571 | |
| 572 | /** |
| 573 | * Filter the language codes. |
| 574 | * |
| 575 | * @since MU |
| 576 | * |
| 577 | * @param array $lang_codes Key/value pair of language codes where key is the short version. |
| 578 | * @param string $code A two-letter designation of the language. |
| 579 | */ |
| 580 | $lang_codes = apply_filters( 'lang_codes', $lang_codes, $code ); |
| 581 | return strtr( $code, $lang_codes ); |
| 582 | } |
| 583 | |
| 584 | /** |
| 585 | * Synchronize category and post tag slugs when global terms are enabled. |
| 586 | * |
| 587 | * @since 3.0.0 |
| 588 | * |
| 589 | * @param $term The term. |