wordpress教程：纯代码实现外链转内链go跳转短链接功能

好易之 • 2020-05-27 00:34 • 技术文档 • 阅读 1138

打开当前wordpress主题的functions.php文件，添加以下代码：

// 代码实现短网址功能
class SimpleURLs {
// Constructor
function __construct() {
//register_activation_hook( __FILE__, ‘flush_rewrite_rules’ );
add_action( ‘init’, array( &$this, ‘register_post_type’ ) );
add_action( ‘manage_posts_custom_column’, array( &$this, ‘columns_data’ ) );
add_filter( ‘manage_edit-surl_columns’, array( &$this, ‘columns_filter’ ) );
add_action( ‘admin_menu’, array( &$this, ‘add_meta_box’ ) );
add_action( ‘save_post’, array( &$this, ‘meta_box_save’ ), 1, 2 );
add_action( ‘template_redirect’, array( &$this, ‘count_and_redirect’ ) );
}
// PHP4 Constructor
function SimpleURLs() {
$this->__construct();
}
function register_post_type() {
register_post_type( ‘surl’,
array(
‘labels’ => array(
‘name’ => __( ‘Simple URLs’ ),
‘singular_name’ => __( ‘URL’ ),
‘add_new’ => __( ‘Add URL’ ),
‘add_new_item’ => __( ‘新建URL’ ),
‘edit’ => __( ‘Edit’ ),
‘edit_item’ => __( ‘Edit URL’ ),
‘new_item’ => __( ‘New URL’ ),
‘view’ => __( ‘View URL’ ),
‘view_item’ => __( ‘View URL’ ),
‘search_items’ => __( ‘Search URL’ ),
‘not_found’ => __( ‘No URLs found’ ),
‘not_found_in_trash’ => __( ” )
),
‘public’ => true,
‘query_var’ => true,
‘menu_position’ => 20,
‘supports’ => array( ‘title’ ),
‘rewrite’ => array( ‘slug’ => ‘go’, ‘with_front’ => false )
)
);
}
function columns_filter( $columns ) {
$columns = array(
‘cb’ => ‘<input type=”checkbox” />’,
‘title’ => __(‘标题’),
‘url’ => __(‘原地址’),
‘permalink’ => __(‘短地址’),
‘clicks’ => __(‘点击量’)
);
return $columns;
}
function columns_data( $column ) {
global $post;
$url = get_post_meta($post->ID, ‘_surl_redirect’, true);
$count = get_post_meta($post->ID, ‘_surl_count’, true);
if ( $column == ‘url’ ) {
echo make_clickable( esc_url( $url ? $url : ” ) );
}
elseif ( $column == ‘permalink’ ) {
echo make_clickable( get_permalink() );
}
elseif ( $column == ‘clicks’ ) {
echo esc_html( $count ? $count : 0 );
}
}
function add_meta_box() {
add_meta_box(‘surl’, __(‘URL信息’, ‘surl’), array( &$this, ‘meta_box’ ), ‘surl’, ‘normal’, ‘high’);
}
function meta_box() {
global $post;
printf( ‘<input type=”hidden” name=”_surl_nonce” value=”%s” />’, wp_create_nonce( plugin_basename(__FILE__) ) );
printf( ‘<p><label for=”%s”>%s</label></p>’, ‘_surl_redirect’, __(‘URL原链接地址：’, ‘surl’) );
printf( ‘<p><input style=”%s” type=”text” name=”%s” id=”%s” value=”%s” /></p>’, ‘width: 99%;’, ‘_surl_redirect’, ‘_surl_redirect’, esc_attr( get_post_meta( $post->ID, ‘_surl_redirect’, true ) ) );
$count = isset( $post->ID ) ? get_post_meta($post->ID, ‘_surl_count’, true) : 0;
printf( ‘<p>此链接已经被点击 <b>%d</b> 次.’, esc_attr( $count ) );
}
function meta_box_save( $post_id, $post ) {
$key = ‘_surl_redirect’;
// verify the nonce
if ( !isset($_POST[‘_surl_nonce’]) || !wp_verify_nonce( $_POST[‘_surl_nonce’], plugin_basename(__FILE__) ) )
return;
// don’t try to save the data under autosave, ajax, or future post.
if ( defined(‘DOING_AUTOSAVE’) && DOING_AUTOSAVE ) return;
if ( defined(‘DOING_AJAX’) && DOING_AJAX ) return;
if ( defined(‘DOING_CRON’) && DOING_CRON ) return;
// is the user allowed to edit the URL?
if ( ! current_user_can( ‘edit_posts’ ) || $post->post_type != ‘surl’ )
return;
$value = isset( $_POST[$key] ) ? $_POST[$key] : ”;
if ( $value ) {
// save/update
update_post_meta($post->ID, $key, $value);
} else {
// delete if blank
delete_post_meta($post->ID, $key);
}
}
function count_and_redirect() {
if ( !is_singular(‘surl’) )
return;
global $wp_query;
// Update the count
$count = isset( $wp_query->post->ID ) ? get_post_meta($wp_query–>post->ID, ‘_surl_count’, true) : 0;
update_post_meta( $wp_query->post->ID, ‘_surl_count’, $count + 1 );
// Handle the redirect
$redirect = isset( $wp_query->post->ID ) ? get_post_meta($wp_query->post->ID, ‘_surl_redirect’, true) : ”;
if ( !emptyempty( $redirect ) ) {
wp_redirect( esc_url_raw( $redirect ), 301);
exit;
}
else {
wp_redirect( home_url(), 302 );
exit;
}
}
}
$SimpleURLs = new SimpleURLs;
// 代码实现短网址功能

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