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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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862 | ); |
863 |
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864 | /** |
865 | * Filter the list of URL parameters to remove. |
866 | * |
867 | * @since 4.2.0 |
868 | * |
869 | * @param array $removable_query_args An array of parameters to remove from the URL. |
870 | */ |
871 | $removable_query_args = apply_filters( 'removable_query_args', $removable_query_args ); |
872 |
|
873 | if ( empty( $removable_query_args ) ) { |
874 | return; |
875 | } |
876 |
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877 | // Ensure we're using an absolute URL. |
878 | $current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] ); |
879 | $filtered_url = remove_query_arg( $removable_query_args, $current_url ); |
880 | ?> |