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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 |
|---|---|
| 902 | * sign-up form, and the default language will be used when creating the site. |
| 903 | * |
| 904 | * Languages not already installed will be stripped. |
| 905 | * |
| 906 | * @since 4.4.0 |
| 907 | * |
| 908 | * @param string[] $languages Array of available language codes. Language codes are formed by |
| 909 | * stripping the .mo extension from the language file names. |
| 910 | */ |
| 911 | $languages = (array) apply_filters( 'signup_get_available_languages', get_available_languages() ); |
| 912 | |
| 913 | /* |
| 914 | * Strip any non-installed languages and return. |
| 915 | * |
| 916 | * Re-call get_available_languages() here in case a language pack was installed |
| 917 | * in a callback hooked to the 'signup_get_available_languages' filter before this point. |
| 918 | */ |
| 919 | return array_intersect_assoc( $languages, get_available_languages() ); |
| 920 | } |