Секреты WP_Query

is_home()
is_single()
is_page()

if ( have_posts() )
while ( have_posts() )
the_post();

query_posts( 'cat=-5' );
$posts = get_posts( 'cat=-5' );
$posts = new WP_Query( 'cat=-5' );

10 posts
+ 10 posts
cat = -5

max_num_pages = 3

index.php
404.php max_num_pages = 5

add_action( 'pre_get_posts', 'my_func' );
function my_func( $query ) {
$query->set( 'cat', '-5' );
}

if ( $query->is_main_query() )
$query->set( 'cat', '-5' );
}

if ( $query->is_search() )
$query->set( 'post_type', 'post' );
}

if ( $query->is_search() )
$query->set( 'posts_per_page', 30 );
}

if ( $query->is_home() )
$query->set( 'post_type', array(
'post',
'book',
) );
}

query_posts();
$posts = get_posts();
$posts = new WP_Query();

$popular = new WP_Query( 'cat=3' );
while ( $popular->have_posts() ) {
$popular->the_post();
...
}

$popular = new WP_Query( 'cat=3' );
while ( $popular->have_posts() ) {
$popular->the_post();
...
}

// Основной запрос
while ( have_posts() ) {
the_post();
...
}

the_post();
...

$category = get_the_category();
$related = new WP_Query( 'cat=' ... );
while ( $related->have_posts() ) {
$related->the_post();
...
}
}

function have_posts() {
global $wp_query;
return $wp_query->have_posts();
}

function &query_posts( $query ) {
...
unset( $wp_query );
$wp_query = new WP_Query();
return $wp_query->query( $query );
}

function wp_reset_query() {
...
unset( $wp_query );
$wp_query =& $wp_the_query;
}

query_posts( 'cat=3' );
the_post();
...
}
wp_reset_query();

the_post();
...
}

Если нужно изменить основной запрос

pre_get_posts

Если нужен вторичный запрос

new WP_Query; get_posts()

Если нужна головная боль

query_posts()

Секреты WP_Query

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Секреты WP_Query