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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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195 | * Filter the taxonomy terms checklist arguments. |
196 | * |
197 | * @since 3.4.0 |
198 | * |
199 | * @see wp_terms_checklist() |
200 | * |
201 | * @param array $args An array of arguments. |
202 | * @param int $post_id The post ID. |
203 | */ |
204 | $params = apply_filters( 'wp_terms_checklist_args', $args, $post_id ); |
205 |
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206 | $r = wp_parse_args( $params, $defaults ); |
207 |
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208 | if ( empty( $r['walker'] ) || ! ( $r['walker'] instanceof Walker ) ) { |
209 | $walker = new Walker_Category_Checklist; |
210 | } else { |
211 | $walker = $r['walker']; |
212 | } |
213 |
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