Extending WP_List_Table - Error: Call to undefined function convert_to_screen()
Extending WP_List_Table - Error: Call to undefined function convert_to_screen()
我正在尝试在插件中扩展 WP class WP_List_Table。
我正在使用下面找到的代码。当我执行我的脚本时，我收到以下消息：
"Fatal error: Uncaught Error: Call to undefined function
convert_to_screen() in
/home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-admin/includes/class-wp-list-table.php:149
Stack trace:
#0
/home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-content/plugins/lessannoyingcrmforwp/inc/API/Functions/LinkListTableFront.php(23):
WP_List_Table->__construct(Array)
#1
/home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-content/plugins/lessannoyingcrmforwp/inc/Base/SearchContactsFunctionController.php(33):
Inc\API\Functions\LinkListTableFront->__construct()
#2
/home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-content/plugins/lessannoyingcrmforwp/inc/Init.php(33):
Inc\Base\SearchContactsFunctionController->register()
#3
/home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-content/plugins/lessannoyingcrmforwp/lessannoyingcrmforwp.php(55):
Inc\Init::register_services()
#4
/home/u794297373/domains/educoder.dk/public_html/lessannoyi in
/home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-admin/includes/class-wp-list-table.php
on line 149"
引用的行调用函数“convert_to_screen()”
我无法弄清楚出了什么问题？
控制器代码：
<?php
/**
* @package LessAnnoyingCRMforWP
*/
namespace Inc\API\Functions;
if(!class_exists('WP_List_Table')){
require_once( ABSPATH . 'wp-admin/includes/screen.php' );
require_once( ABSPATH . 'wp-admin/includes/class-wp-list-table.php' );
}
class LinkListTableFront extends \WP_List_Table
{
/**
* Constructor, we override the parent to pass our own arguments
* We usually focus on three parameters: singular and plural labels, as well as whether the class supports AJAX.
*/
function __construct() {
parent::__construct( array(
'singular'=> 'wp_list_text_link', //Singular label
'plural' => 'wp_list_test_links', //plural label, also this well be one of the table css class
'ajax' => false //We won't support Ajax for this table
) );
}
/**
* Add extra markup in the toolbars before or after the list
* @param string $which, helps you decide if you add the markup after (bottom) or before (top) the list
*/
function extra_tablenav( $which ) {
if ( $which == "top" ){
//The code that goes before the table is here
echo "Hello, I'm before the table";
}
if ( $which == "bottom" ){
//The code that goes after the table is there
echo "Hi, I'm after the table";
}
}
/**
* Define the columns that are going to be used in the table
* @return array $columns, the array of columns to use with the table
*/
function get_columns() {
return $columns = [
'col_link_id'=>__('ID'),
'col_link_name'=>__('Name'),
'col_link_url'=>__('Url'),
'col_link_description'=>__('Description'),
'col_link_visible'=>__('Visible')
];
}
/**
* Decide which columns to activate the sorting functionality on
* @return array $sortable, the array of columns that can be sorted by the user
*/
public function get_sortable_columns() {
return $sortable = array(
'col_link_id'=>'link_id',
'col_link_name'=>'link_name',
'col_link_visible'=>'link_visible'
);
}
/**
* Prepare the table with different parameters, pagination, columns and table elements
*/
function prepare_items() {
global $wpdb, $_wp_column_headers;
$screen = get_current_screen();
/* -- Preparing your query -- */
$query = "SELECT * FROM $wpdb->links";
/* -- Ordering parameters -- */
//Parameters that are going to be used to order the result
$orderby = !empty($_GET["orderby"]) ? mysql_real_escape_string($_GET["orderby"]) : 'ASC';
$order = !empty($_GET["order"]) ? mysql_real_escape_string($_GET["order"]) : '';
if ( ! empty($orderby) & ! empty($order) ) { $query .= ' ORDER BY ' . $orderby . ' ' . $order; }
/* -- Pagination parameters -- */
//Number of elements in your table?
$totalitems = $wpdb->query($query); //return the total number of affected rows
//How many to display per page?
$perpage = 5;
//Which page is this?
$paged = !empty($_GET["paged"]) ? mysql_real_escape_string($_GET["paged"]) : '';
//Page Number
if(empty($paged) || !is_numeric($paged) || $paged<=0 ){ $paged=1; } //How many pages do we have in total?
$totalpages = ceil($totalitems/$perpage); //adjust the query to take pagination into account
if(!empty($paged) && !empty($perpage)){ $offset=($paged-1)*$perpage; $query.=' LIMIT '.(int)$offset.','.(int)$perpage; }
/* -- Register the pagination -- */
$this->set_pagination_args( array(
"total_items" => $totalitems,
"total_pages" => $totalpages,
"per_page" => $perpage,
) );
//The pagination links are automatically built according to those parameters
/* -- Register the Columns -- */
$columns = $this->get_columns();
$_wp_column_headers[$screen->id]=$columns;
/* -- Fetch the items -- */
$this->items = $wpdb->get_results($query);
}
/**
* Display the rows of records in the table
* @return string, echo the markup of the rows
*/
function display_rows() {
//Get the records registered in the prepare_items method
$records = $this->items;
//Get the columns registered in the get_columns and get_sortable_columns methods
list( $columns, $hidden ) = $this->get_column_info();
//Loop for each record
if(!empty($records)) {
foreach ( $records as $rec) {
//Open the line
echo '< tr id="record_'.$rec->link_id.'">';
foreach ( $columns as $column_name => $column_display_name ) {
//Style attributes for each col
$class = "class='$column_name column-$column_name'";
$style = "";
if ( in_array( $column_name, $hidden ) ) $style = ' style="display:none;"';
$attributes = $class . $style;
//edit link
$editlink = '/wp-admin/link.php?action=edit&link_id='.(int)$rec->link_id;
//Display the cell
switch ( $column_name ) {
case "col_link_id": echo '< td '.$attributes.'>'.stripslashes($rec->link_id).'< /td>'; break;
case "col_link_name": echo '< td '.$attributes.'>'.stripslashes($rec->link_name).'< /td>'; break;
case "col_link_url": echo '< td '.$attributes.'>'.stripslashes($rec->link_url).'< /td>'; break;
case "col_link_description": echo '< td '.$attributes.'>'.$rec->link_description.'< /td>'; break;
case "col_link_visible": echo '< td '.$attributes.'>'.$rec->link_visible.'< /td>'; break;
}
}
//Close the line
echo'< /tr>';
}
}
}
}
已解决：问题是实例化的顺序。通过添加 add_action( 'call', [ $this, 'initClass' ]);在正确的时间调用了 class。
然后我在需要调用列表的页面上有一个do_action命令。显然脚本在初始代码中被调用得太早了。
我得到了代码：
add_action( 'search_for_contact_or_company', [ $this, 'initSearchList' ] );
add_action( 'add_contact', [ $this, 'initCreateContact' ] );
}
public static function initSearchList( $arg ) {
$this->search_list_table = new SearchListTableAdmin();
$searchLess = $arg;
do_action( 'search_for_contact', $searchLess );
}
initSearchList 函数然后调用我的 SearchListTableAdmin 中代码的呈现 class。
我正在尝试在插件中扩展 WP class WP_List_Table。
我正在使用下面找到的代码。当我执行我的脚本时，我收到以下消息：
"Fatal error: Uncaught Error: Call to undefined function convert_to_screen() in /home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-admin/includes/class-wp-list-table.php:149
Stack trace:
#0 /home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-content/plugins/lessannoyingcrmforwp/inc/API/Functions/LinkListTableFront.php(23): WP_List_Table->__construct(Array)
#1 /home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-content/plugins/lessannoyingcrmforwp/inc/Base/SearchContactsFunctionController.php(33): Inc\API\Functions\LinkListTableFront->__construct()
#2 /home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-content/plugins/lessannoyingcrmforwp/inc/Init.php(33): Inc\Base\SearchContactsFunctionController->register()
#3 /home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-content/plugins/lessannoyingcrmforwp/lessannoyingcrmforwp.php(55): Inc\Init::register_services()
#4 /home/u794297373/domains/educoder.dk/public_html/lessannoyi in /home/u794297373/domains/educoder.dk/public_html/lessannoyingcmsforwp/wp-admin/includes/class-wp-list-table.php on line 149"
引用的行调用函数“convert_to_screen()”
我无法弄清楚出了什么问题？
控制器代码：
<?php
/**
* @package LessAnnoyingCRMforWP
*/
namespace Inc\API\Functions;
if(!class_exists('WP_List_Table')){
require_once( ABSPATH . 'wp-admin/includes/screen.php' );
require_once( ABSPATH . 'wp-admin/includes/class-wp-list-table.php' );
}
class LinkListTableFront extends \WP_List_Table
{
/**
* Constructor, we override the parent to pass our own arguments
* We usually focus on three parameters: singular and plural labels, as well as whether the class supports AJAX.
*/
function __construct() {
parent::__construct( array(
'singular'=> 'wp_list_text_link', //Singular label
'plural' => 'wp_list_test_links', //plural label, also this well be one of the table css class
'ajax' => false //We won't support Ajax for this table
) );
}
/**
* Add extra markup in the toolbars before or after the list
* @param string $which, helps you decide if you add the markup after (bottom) or before (top) the list
*/
function extra_tablenav( $which ) {
if ( $which == "top" ){
//The code that goes before the table is here
echo "Hello, I'm before the table";
}
if ( $which == "bottom" ){
//The code that goes after the table is there
echo "Hi, I'm after the table";
}
}
/**
* Define the columns that are going to be used in the table
* @return array $columns, the array of columns to use with the table
*/
function get_columns() {
return $columns = [
'col_link_id'=>__('ID'),
'col_link_name'=>__('Name'),
'col_link_url'=>__('Url'),
'col_link_description'=>__('Description'),
'col_link_visible'=>__('Visible')
];
}
/**
* Decide which columns to activate the sorting functionality on
* @return array $sortable, the array of columns that can be sorted by the user
*/
public function get_sortable_columns() {
return $sortable = array(
'col_link_id'=>'link_id',
'col_link_name'=>'link_name',
'col_link_visible'=>'link_visible'
);
}
/**
* Prepare the table with different parameters, pagination, columns and table elements
*/
function prepare_items() {
global $wpdb, $_wp_column_headers;
$screen = get_current_screen();
/* -- Preparing your query -- */
$query = "SELECT * FROM $wpdb->links";
/* -- Ordering parameters -- */
//Parameters that are going to be used to order the result
$orderby = !empty($_GET["orderby"]) ? mysql_real_escape_string($_GET["orderby"]) : 'ASC';
$order = !empty($_GET["order"]) ? mysql_real_escape_string($_GET["order"]) : '';
if ( ! empty($orderby) & ! empty($order) ) { $query .= ' ORDER BY ' . $orderby . ' ' . $order; }
/* -- Pagination parameters -- */
//Number of elements in your table?
$totalitems = $wpdb->query($query); //return the total number of affected rows
//How many to display per page?
$perpage = 5;
//Which page is this?
$paged = !empty($_GET["paged"]) ? mysql_real_escape_string($_GET["paged"]) : '';
//Page Number
if(empty($paged) || !is_numeric($paged) || $paged<=0 ){ $paged=1; } //How many pages do we have in total?
$totalpages = ceil($totalitems/$perpage); //adjust the query to take pagination into account
if(!empty($paged) && !empty($perpage)){ $offset=($paged-1)*$perpage; $query.=' LIMIT '.(int)$offset.','.(int)$perpage; }
/* -- Register the pagination -- */
$this->set_pagination_args( array(
"total_items" => $totalitems,
"total_pages" => $totalpages,
"per_page" => $perpage,
) );
//The pagination links are automatically built according to those parameters
/* -- Register the Columns -- */
$columns = $this->get_columns();
$_wp_column_headers[$screen->id]=$columns;
/* -- Fetch the items -- */
$this->items = $wpdb->get_results($query);
}
/**
* Display the rows of records in the table
* @return string, echo the markup of the rows
*/
function display_rows() {
//Get the records registered in the prepare_items method
$records = $this->items;
//Get the columns registered in the get_columns and get_sortable_columns methods
list( $columns, $hidden ) = $this->get_column_info();
//Loop for each record
if(!empty($records)) {
foreach ( $records as $rec) {
//Open the line
echo '< tr id="record_'.$rec->link_id.'">';
foreach ( $columns as $column_name => $column_display_name ) {
//Style attributes for each col
$class = "class='$column_name column-$column_name'";
$style = "";
if ( in_array( $column_name, $hidden ) ) $style = ' style="display:none;"';
$attributes = $class . $style;
//edit link
$editlink = '/wp-admin/link.php?action=edit&link_id='.(int)$rec->link_id;
//Display the cell
switch ( $column_name ) {
case "col_link_id": echo '< td '.$attributes.'>'.stripslashes($rec->link_id).'< /td>'; break;
case "col_link_name": echo '< td '.$attributes.'>'.stripslashes($rec->link_name).'< /td>'; break;
case "col_link_url": echo '< td '.$attributes.'>'.stripslashes($rec->link_url).'< /td>'; break;
case "col_link_description": echo '< td '.$attributes.'>'.$rec->link_description.'< /td>'; break;
case "col_link_visible": echo '< td '.$attributes.'>'.$rec->link_visible.'< /td>'; break;
}
}
//Close the line
echo'< /tr>';
}
}
}
}
已解决：问题是实例化的顺序。通过添加 add_action( 'call', [ $this, 'initClass' ]);在正确的时间调用了 class。
然后我在需要调用列表的页面上有一个do_action命令。显然脚本在初始代码中被调用得太早了。
我得到了代码：
add_action( 'search_for_contact_or_company', [ $this, 'initSearchList' ] );
add_action( 'add_contact', [ $this, 'initCreateContact' ] );
}
public static function initSearchList( $arg ) {
$this->search_list_table = new SearchListTableAdmin();
$searchLess = $arg;
do_action( 'search_for_contact', $searchLess );
}
initSearchList 函数然后调用我的 SearchListTableAdmin 中代码的呈现 class。