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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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131 |
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132 | $this->set_hierarchical_display( is_post_type_hierarchical( $this->screen->post_type ) && 'menu_order title' == $wp_query->query['orderby'] ); |
133 |
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134 | $total_items = $this->hierarchical_display ? $wp_query->post_count : $wp_query->found_posts; |
135 |
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136 | $post_type = $this->screen->post_type; |
137 | $per_page = $this->get_items_per_page( 'edit_' . $post_type . '_per_page' ); |
138 |
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139 | /** This filter is documented in wp-admin/includes/post.php */ |
140 | $per_page = apply_filters( 'edit_posts_per_page', $per_page, $post_type ); |
141 |
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142 | if ( $this->hierarchical_display ) |
143 | $total_pages = ceil( $total_items / $per_page ); |
144 | else |
145 | $total_pages = $wp_query->max_num_pages; |
146 |
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147 | if ( ! empty( $_REQUEST['mode'] ) ) { |
148 | $mode = $_REQUEST['mode'] == 'excerpt' ? 'excerpt' : 'list'; |
149 | set_user_setting ( 'posts_list_mode', $mode ); |