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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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31 |
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32 | /** |
33 | * Filter the taxonomy used to retrieve terms when calling {@see get_categories()}. |
34 | * |
35 | * @since 2.7.0 |
36 | * |
37 | * @param string $taxonomy Taxonomy to retrieve terms from. |
38 | * @param array $args An array of arguments. See {@see get_terms()}. |
39 | */ |
40 | $taxonomy = apply_filters( 'get_categories_taxonomy', $taxonomy, $args ); |
41 |
|
42 | // Back compat |
43 | if ( isset($args['type']) && 'link' == $args['type'] ) { |
44 | /* translators: 1: "type => link", 2: "taxonomy => link_category" alternative */ |
45 | _deprecated_argument( __FUNCTION__, '3.0', |
46 | sprintf( __( '%1$s is deprecated. Use %2$s instead.' ), |
47 | '<code>type => link</code>', |
48 | '<code>taxonomy => link_category</code>' |
49 | ) |