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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 |
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527 |
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528 | /** |
529 | * Filters the language codes. |
530 | * |
531 | * @since MU (3.0.0) |
532 | * |
533 | * @param string[] $lang_codes Array of key/value pairs of language codes where key is the short version. |
534 | * @param string $code A two-letter designation of the language. |
535 | */ |
536 | $lang_codes = apply_filters( 'lang_codes', $lang_codes, $code ); |
537 | return strtr( $code, $lang_codes ); |
538 | } |
539 |
|
540 | /** |
541 | * Synchronizes category and post tag slugs when global terms are enabled. |
542 | * |
543 | * @since 3.0.0 |
544 | * |
545 | * @param WP_Term|array $term The term. |