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General: Add filter to WP_Posts_List_Table::get_table_classes(). Adds… #11487

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General: Add filter to WP_Posts_List_Table::get_table_classes(). Adds… #11487

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General: Add filter to WP_Posts_List_Table::get_table_classes(). Adds…
NikhilMaheshwariMiniOrange Apr 9, 2026
26298f9
Tests: Remove deprecated ReflectionMethod::setAccessible() calls.
NikhilMaheshwariMiniOrange Apr 9, 2026
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24 changes: 18 additions & 6 deletions src/wp-admin/includes/class-wp-posts-list-table.php
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Original file line number Diff line number Diff line change
Expand Up @@ -640,12 +640,24 @@ protected function get_table_classes() {

$mode_class = esc_attr( 'table-view-' . $mode );

return array(
'widefat',
'fixed',
'striped',
$mode_class,
is_post_type_hierarchical( $this->screen->post_type ) ? 'pages' : 'posts',
/**
* Filters the CSS classes applied to the posts list table.
*
* @since 6.8.0
*
* @param string[] $classes An array of CSS classes for the posts list table.
* @param string $post_type The post type slug.
*/
return apply_filters(
'post_list_table_classes',
array(
'widefat',
'fixed',
'striped',
$mode_class,
is_post_type_hierarchical( $this->screen->post_type ) ? 'pages' : 'posts',
),
$this->screen->post_type
);
}

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65 changes: 65 additions & 0 deletions tests/phpunit/tests/admin/wpPostsListTable.php
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Original file line number Diff line number Diff line change
Expand Up @@ -309,6 +309,71 @@ public function test_empty_trash_button_should_not_be_shown_if_there_are_no_post
$this->assertStringNotContainsString( 'id="delete_all"', $output );
}

/**
* @ticket 58824
*
* @covers WP_Posts_List_Table::get_table_classes
*/
public function test_get_table_classes_returns_default_classes() {
$method = new ReflectionMethod( $this->table, 'get_table_classes' );

$classes = $method->invoke( $this->table );

$this->assertContains( 'widefat', $classes );
$this->assertContains( 'fixed', $classes );
$this->assertContains( 'striped', $classes );
$this->assertContains( 'pages', $classes );
}

/**
* @ticket 58824
*
* @covers WP_Posts_List_Table::get_table_classes
*/
public function test_get_table_classes_filter_modifies_classes() {
add_filter(
'post_list_table_classes',
static function ( $classes ) {
$classes[] = 'my-custom-class';
return $classes;
}
);

$method = new ReflectionMethod( $this->table, 'get_table_classes' );

$classes = $method->invoke( $this->table );

remove_all_filters( 'post_list_table_classes' );

$this->assertContains( 'my-custom-class', $classes );
}

/**
* @ticket 58824
*
* @covers WP_Posts_List_Table::get_table_classes
*/
public function test_get_table_classes_filter_receives_post_type() {
$received_post_type = null;

add_filter(
'post_list_table_classes',
static function ( $classes, $post_type ) use ( &$received_post_type ) {
$received_post_type = $post_type;
return $classes;
},
10,
2
);

$method = new ReflectionMethod( $this->table, 'get_table_classes' );
$method->invoke( $this->table );

remove_all_filters( 'post_list_table_classes' );

$this->assertSame( 'page', $received_post_type );
}

/**
* @ticket 42066
*
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