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Source View: posts_fields

To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).

Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: 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.

Source View

Line Code
3247
3248                /**
3249                 * Filter the SELECT clause of the query.
3250                 *
3251                 * @since 2.1.0
3252                 *
3253                 * @param string   $fields The SELECT clause of the query.
3254                 * @param WP_Query &$this  The WP_Query instance (passed by reference).
3255                 */
3256                $fields = apply_filters_ref_array( 'posts_fields', array( $fields, &$this ) );
3257
3258                /**
3259                 * Filter all query clauses at once, for convenience.
3260                 *
3261                 * Covers the WHERE, GROUP BY, JOIN, ORDER BY, DISTINCT,
3262                 * fields (SELECT), and LIMITS clauses.
3263                 *
3264                 * @since 3.1.0
3265                 *