如何从侧栏小部件处理表单-使用get_field_name()处理$_POST变量

由于Wordpress将他们的内容称为“帖子”，因此很难找到关于处理按照POST协议提交的表单的信息。我的问题很简单，对于经验丰富的Wordpress开发人员来说，答案应该很简单。

使用在类的widget方法中具有表单的Wordpress插件，我使用Wordpress get\\u field\\u name函数命名变量。我找不到相应的函数来确定要处理的$\\u POST变量。我可以勉强找到一个解决方案，但我想专门为此使用Wordpress框架。

我需要维护类变量结构，这样这个小部件的多个实例就不会有变量重叠。我可以简单地设置名称并使用args中的widget\\u id，但这似乎不是保持在框架内的正确方法。

To clarify further, the widget delivers a form for the user side, not the admin side.

示例：

class someWidget extends WP_Widget {
 public function someWidget() {
  $this->WP_Widget(\'somewidget\', __(\'Some Widget\'));
 }

 public function form($instance) {
 }

 public function update( $new_instance, $old_instance ) {
  $instance = $old_instance;
  return $instance;
 }

 public function widget($args, $instance) {
  $before_title = $before_widget = $after_widget = $after_title = \'\';
  extract($args, EXTR_IF_EXISTS);
  echo $before_widget.$before_title.$instance[\'WidgetTitle\'].$after_title;

  $somewidget_variable = $_POST[\'????\']; // < -- What function retreives the variable?
  if ($somewidget_variable) {
   // amazing stuff
  }
?>
<form method="POST">
<input id="<?php echo $this->get_field_id(\'somewidget_variable\');?>" name="<?php echo $this->get_field_name(\'somewidget_variable\');?>" type="text" value="<?php echo $somewidget_variable;?>" />
<input type="submit" />
</form>
<?php
echo $after_widget;
 }
}

/** * Constructs name attributes for use in form() fields * * This function should be used in form() methods to create name attributes for fields to be saved by update() * * @param string $field_name Field name * @return string Name attribute for $field_name */ function get_field_name($field_name) { return \'widget-\' . $this->id_base . \'[\' . $this->number . \'][\' . $field_name . \']\'; }

class someWidget extends WP_Widget { public function someWidget() { $this->WP_Widget(\'somewidget\', __(\'Some Widget\')); } public function form($instance) { } public function update( $new_instance, $old_instance ) { $instance = $old_instance; return $instance; } public function widget($args, $instance) { $before_title = $before_widget = $after_widget = $after_title = \'\'; extract($args, EXTR_IF_EXISTS); echo $before_widget.$before_title.$instance[\'WidgetTitle\'].$after_title; $somewidget_variable = $_POST[\'somewidget_\'.$this->id]; if ($somewidget_variable) { // amazing stuff } ?> <form method="POST"> <input id="somewidget_<?php echo $this->id;?>" name="somewidget_<?php echo $this->id;?>" type="text" value="<?php echo $somewidget_variable;?>" /> <input type="submit" /> </form> <?php echo $after_widget; } }

$my_widget = $this; // this action gets to run once only add_action(\'init\', function() use($my_widget){ // give up if there isn\'t an instance active of this widget if(!is_active_widget(false, false, $my_widget->id_base, true)) return; // get widget options from all instances $widget_options = get_option($my_widget->option_name); // loop trough options of each instance foreach((array)$widget_options as $instance => &$options){ // identify instance $id = "{$my_widget->id_base}-{$instance}"; // this instance is not active, so skip it if(!is_active_widget(false, $id, $my_widget->id_base)) continue; // here process your form for this specific widget instance if(isset($_POST["some_field-{$id}"])){ // the $options variable holds the instance options } } // if you need to update the options for all instances... update_option($my_widget->option_name, $widget_options); });

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