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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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386 | $this->meta_query->parse_query_vars( $this->query_vars ); |
387 |
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388 | /** |
389 | * Fires before comments are retrieved. |
390 | * |
391 | * @since 3.1.0 |
392 | * |
393 | * @param WP_Comment_Query $query Current instance of WP_Comment_Query (passed by reference). |
394 | */ |
395 | do_action_ref_array( 'pre_get_comments', array( &$this ) ); |
396 |
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397 | // Reparse query vars, in case they were modified in a 'pre_get_comments' callback. |
398 | $this->meta_query->parse_query_vars( $this->query_vars ); |
399 | if ( ! empty( $this->meta_query->queries ) ) { |
400 | $this->meta_query_clauses = $this->meta_query->get_sql( 'comment', $wpdb->comments, 'comment_ID', $this ); |
401 | } |
402 |
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403 | $comment_data = null; |
404 |
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