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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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26 | $taxonomy = $args['taxonomy']; |
27 | /** |
28 | * Filter the taxonomy used to retrieve terms when calling get_categories(). |
29 | * |
30 | * @since 2.7.0 |
31 | * |
32 | * @param string $taxonomy Taxonomy to retrieve terms from. |
33 | * @param array $args An array of arguments. @see get_terms() |
34 | */ |
35 | $taxonomy = apply_filters( 'get_categories_taxonomy', $taxonomy, $args ); |
36 |
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37 | // Back compat |
38 | if ( isset($args['type']) && 'link' == $args['type'] ) { |
39 | _deprecated_argument( __FUNCTION__, '3.0', '' ); |
40 | $taxonomy = $args['taxonomy'] = 'link_category'; |
41 | } |
42 |
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43 | $categories = (array) get_terms( $taxonomy, $args ); |
44 |
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