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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 |
|---|---|
| 525 | |
| 526 | /** |
| 527 | * Filters the language codes. |
| 528 | * |
| 529 | * @since MU (3.0.0) |
| 530 | * |
| 531 | * @param string[] $lang_codes Array of key/value pairs of language codes where key is the short version. |
| 532 | * @param string $code A two-letter designation of the language. |
| 533 | */ |
| 534 | $lang_codes = apply_filters( 'lang_codes', $lang_codes, $code ); |
| 535 | return strtr( $code, $lang_codes ); |
| 536 | } |
| 537 | |
| 538 | /** |
| 539 | * Synchronizes category and post tag slugs when global terms are enabled. |
| 540 | * |
| 541 | * @since 3.0.0 |
| 542 | * |
| 543 | * @param WP_Term|array $term The term. |