01wordpress AJAX 教學

14 1 月

Powen Ko

CH16AJAX

off

中文文章這裡

原始程式可以在此下載

[php]

<?php

/*
Plugin Name: PowenKo Page POST Meta
Plugin URI: http://wordpress.org/plugins/hello-dolly/
Description: This is not just a plugin, it symbolizes the hope and enthusiasm of an entire generation summed up in two words sung most famously by Louis Armstrong: Hello, Dolly. When activated you will randomly see a lyric from <cite>Hello, Dolly</cite> in the upper right of your admin screen on every page.
Author: Powen Ko
Version: 1.6
Author URI: http://ma.tt/
*/
// 註冊自訂的Widget-EX_Widget
function register_ex_widget() {
register_widget( ‘EX_Widget’ );
}

add_action( ‘wp_ajax_my_ajax_action’, ‘ajax_action_stuff’ ); // 針對已登入的使用者
add_action( ‘wp_ajax_nopriv_my_ajax_action’, ‘ajax_action_stuff’ ); // 針對未登入的使用者
function ajax_action_stuff() {
$post_id = $_POST[‘post_id’]; // 從ajax POST的請求取得的參數資料
echo $post_id; // 單純的印出來，如此前端就會收到
die(); // 一定要加這行，才會完整的處理ajax請求
}

add_action(‘init’, ‘add_my_ajax_script’);
function add_my_ajax_script(){
echo ‘<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>’;
// wp_enqueue_script( ‘my_ajax_script’, get_stylesheet_directory_uri().’/js/script.js’, array(‘jquery’), 1.0 );
// wp_localize_script( ‘my_ajax_script’, ‘my_ajax_obj’, array( ‘ajaxurl’ => admin_url( ‘admin-ajax.php’ ) ) ); // 先將ajaxurl變數設定好
}

add_action( ‘widgets_init’, ‘register_ex_widget’ );

// 自訂的EX_Widget類別，要繼承WP_Widget
class EX_Widget extends WP_Widget {
// 一些初始化設定
function EX_Widget() {
$widget_ops = array( ‘classname’ => ‘side_ex’, ‘description’ => ‘還記得我嗎？大聲點我聽不見~’);
$control_ops = array( ‘width’ => 300, ‘height’ => 750, ‘id_base’ => ‘side_ex-widget’ );
$this->WP_Widget( ‘side_ex-widget’, ‘我的名字’, $widget_ops, $control_ops );
}

// 描述widget顯示於前台時的外觀
function widget( $args, $instance ) {
// $args裡可以拿到所在版位的相關資訊，如before_widget、after_widget..等
extract( $args );
echo $before_widget;
?>
<script>
jQuery(function(){
// 按下按鈕後開始送出POST要求
$(‘.btn_ajax’).click(function () {
$.post(‘<?php echo admin_url( ‘admin-ajax.php’ );?>’, {
action: ‘my_ajax_action’, // 自取一個action的名稱
post_id: $(‘#my_id’).val() // 附上的參數
}, function(data) {
alert(data); // 當AJAX處理完畢，就把回傳的資料alert出來
});
});
});

</script>

<input type="text" value="powenko.com" id="my_id">
<input type="button" class="btn_ajax" value="按我">
<?php
echo $after_widget;
}

// 於後台更新Widget時會做的事
function update( $new_instance, $old_instance ) {
$instance = $old_instance;
// 簡單幫設定內容作一下Strip tags，擋掉html tag
$instance[‘myname’] = strip_tags( $new_instance[‘myname’] );
return $instance;
}

// Widget在後台模組頁的外觀
function form( $instance ) {
// 可以設定預設值
$defaults = array(‘myname’=>’熱血大叔’);
$instance = wp_parse_args( (array) $instance, $defaults ); ?>
<p>
<label for="<?php echo $this->get_field_id( ‘myname’ ); ?>">設定要顯示的名字：</label>
<input type="text" name="<?php echo $this->get_field_name( ‘myname’ ); ?>" value="<?php echo $instance[‘myname’]; ?>">
</p>
<?php
}
}
/////////////////////////
function side_widgets_init() {
register_sidebar(array(
‘name’ => ‘側欄模組區’,
‘id’ => ‘sidebar-sec’,
‘before_widget’ => ‘<div id="%1$s" class="%2$s sidebar_frm">’,
‘after_widget’ => ‘</div>’,
‘before_title’ => ‘<h4 class="widgettitle">’,
‘after_title’ => ‘</h4>’,
));
}
add_action( ‘widgets_init’, ‘side_widgets_init’ );
/////////