我正在使用一个与Ajax一起使用的插件来创建关注按钮，以使我们的用户彼此关注。
我将“关注”按钮放在任何需要用户关注其他用户的地方echo pwuf_get_follow_unfollow_links( //user id here );
我面临的问题是，如果我在任何Ajax分页模板中添加了此echo函数，无论发布Ajax分页还是用户列出Ajax分页，那么“跟随”按钮将无法工作，并且在单击时找不到用户ID！
但是可以肯定的是，在我将更多内容加载到第二页之前，他可以在第一页上找到用户ID！
例如：如果我有这样的Ajax分页，并试图在此Ajax分页中回显“跟随”按钮功能，则不起作用！？
add_action('wp_ajax_loadmore_by_ajax', 'loadmore_by_ajax_callback');
add_action('wp_ajax_nopriv_loadmore_by_ajax', 'loadmore_by_ajax_callback');
function loadmore_by_ajax_callback() {
//do something
//echoing follow button
echo pwuf_get_follow_unfollow_links( //user id here );
}
我将在下面添加所有插件代码，希望能得到一些帮助来解决此问题，谢谢。
follow.js
jQuery(document).ready(function($) {
/*******************************
follow / unfollow a user
*******************************/
$( '.follow-links a' ).on('click', function(e) {
e.preventDefault();
var $this = $(this);
if( pwuf_vars.logged_in != 'undefined' && pwuf_vars.logged_in != 'true' ) {
alert( pwuf_vars.login_required );
return;
}
var data = {
action: $this.hasClass('follow') ? 'follow' : 'unfollow',
user_id: $this.data('user-id'),
follow_id: $this.data('follow-id'),
nonce: pwuf_vars.nonce
};
$this.closest('.follow-links').find('img.pwuf-ajax').show();
$.post( pwuf_vars.ajaxurl, data, function ( response ) {
if ( response == 'success' ) {
if ( $this.hasClass( 'follow' ) ) {;
$this.removeClass( 'follow' ).addClass( 'unfollow' );
$this.find( 'span' ).text( 'Unfollow' );
} else {;
$this.removeClass( 'unfollow' ).addClass( 'follow' );
$this.find( 'span' ).text( 'Follow' );
}
} else {
alert( pwuf_vars.processing_error );
}
$this.closest('.follow-links').find('img.pwuf-ajax').hide();
});
});
});
actions.php
<?php
/**
* Ajax Actions
*
* @package User Following System
* @subpackage Ajax Actions
* @copyright Copyright (c) 2012, Pippin Williamson
* @license http://opensource.org/licenses/gpl-2.0.php GNU Public License
* @since 1.0
*/
/**
* Processes the ajax request to follow a user
*
* @access private
* @since 1.0
* @return void
*/
function pwuf_process_new_follow() {
if ( isset( $_POST['user_id'] ) && isset( $_POST['follow_id'] ) ) {
if( pwuf_follow_user( absint( $_POST['user_id'] ), absint( $_POST['follow_id'] ) ) ) {
echo 'success';
} else {
echo 'failed';
}
}
die();
}
add_action('wp_ajax_follow', 'pwuf_process_new_follow');
/**
* Processes the ajax request to unfollow a user
*
* @access private
* @since 1.0
* @return void
*/
function pwuf_process_unfollow() {
if ( isset( $_POST['user_id'] ) && isset( $_POST['follow_id'] ) ) {
if( pwuf_unfollow_user( absint( $_POST['user_id'] ), absint( $_POST['follow_id'] ) ) ) {
echo 'success';
} else {
echo 'failed';
}
}
die();
}
add_action('wp_ajax_unfollow', 'pwuf_process_unfollow');
display-functions.php
<?php
/**
* Retrieves the follow / unfollow links
*
* @access public
* @since 1.0
* @param int $user_id - the ID of the user to display follow / unfollow links for
* @return string
*/
function pwuf_get_follow_unfollow_links( $follow_id = null ) {
global $user_ID;
if( empty( $follow_id ) )
return;
if ( $follow_id == $user_ID )
return;
ob_start(); ?>
<div class="follow-links">
<?php
if ( pwuf_is_following( $user_ID, $follow_id ) ) {
$classes = "unfollow";
$text = "Following";
} else {
$classes = "follow";
$text = "Follow";
}
?>
<span><a href="#" class="<?php echo $classes; ?>" data-user-id="<?php echo $user_ID; ?>" data-follow-id="<?php echo $follow_id; ?>"><span><?php echo $text; ?></span></a></span>
<img src="<?php echo PWUF_FOLLOW_URL; ?>/images/loading.svg" class="pwuf-ajax" style="display:none;"/>
</div>
<?php
return ob_get_clean();
}
follow-functions.php
<?php
/**
* Follow Functions
*
* @package User Following System
* @subpackage Follow Functions
* @copyright Copyright (c) 2012, Pippin Williamson
* @license http://opensource.org/licenses/gpl-2.0.php GNU Public License
* @since 1.0
*/
/**
* Retrieves all users that the specified user follows
*
* Gets all users that $user_id followers
*
* @access private
* @since 1.0
* @param int $user_id - the ID of the user to retrieve following for
* @return array
*/
function pwuf_get_following( $user_id = 0 ) {
if ( empty( $user_id ) ) {
$user_id = get_current_user_id();
}
$following = get_user_meta( $user_id, '_pwuf_following', true );
if ( empty( $following ) ) {
return;
}
return (array) apply_filters( 'pwuf_get_following', $following, $user_id );
}
/**
* Retrieves users that follow a specified user
*
* Gets all users following $user_id
*
* @access private
* @since 1.0
* @param int $user_id - the ID of the user to retrieve followers for
* @return array
*/
function pwuf_get_followers( $user_id = 0 ) {
if ( empty( $user_id ) ) {
$user_id = get_current_user_id();
}
$followers = get_user_meta( $user_id, '_pwuf_followers', true );
if ( empty( $followers ) ) {
return;
}
return (array) apply_filters( 'pwuf_get_followers', $followers, $user_id );
}
/**
* Follow a user
*
* Makes a user follow another user
*
* @access private
* @since 1.0
* @param int $user_id - the ID of the user that is doing the following
* @param int $user_to_follow - the ID of the user that is being followed
* @return bool
*/
function pwuf_follow_user( $user_id, $user_to_follow ) {
$following = pwuf_get_following( $user_id );
if ( $following && is_array( $following ) ) {
$following[] = $user_to_follow;
} else {
$following = array();
$following[] = $user_to_follow;
}
// retrieve the IDs of all users who are following $user_to_follow
$followers = pwuf_get_followers( $user_to_follow );
if ( $followers && is_array( $followers ) ) {
$followers[] = $user_id;
} else {
$followers = array();
$followers[] = $user_id;
}
do_action( 'pwuf_pre_follow_user', $user_id, $user_to_follow );
// update the IDs that this user is following
$followed = update_user_meta( $user_id, '_pwuf_following', $following );
// update the IDs that follow $user_id
$followers = update_user_meta( $user_to_follow, '_pwuf_followers', $followers );
// increase the followers count
$followed_count = pwuf_increase_followed_by_count( $user_to_follow ) ;
if ( $followed ) {
do_action( 'pwuf_post_follow_user', $user_id, $user_to_follow );
return true;
}
return false;
}
/**
* Unfollow a user
*
* Makes a user unfollow another user
*
* @access private
* @since 1.0
* @param int $user_id - the ID of the user that is doing the unfollowing
* @param int $unfollow_user - the ID of the user that is being unfollowed
* @return bool
*/
function pwuf_unfollow_user( $user_id, $unfollow_user ) {
do_action( 'pwuf_pre_unfollow_user', $user_id, $unfollow_user );
// get all IDs that $user_id follows
$following = pwuf_get_following( $user_id );
if ( is_array( $following ) && in_array( $unfollow_user, $following ) ) {
$modified = false;
foreach ( $following as $key => $follow ) {
if ( $follow == $unfollow_user ) {
unset( $following[$key] );
$modified = true;
}
}
if ( $modified ) {
if ( update_user_meta( $user_id, '_pwuf_following', $following ) ) {
pwuf_decrease_followed_by_count( $unfollow_user );
}
}
}
// get all IDs that follow the user we have just unfollowed so that we can remove $user_id
$followers = pwuf_get_followers( $unfollow_user );
if ( is_array( $followers ) && in_array( $user_id, $followers ) ) {
$modified = false;
foreach ( $followers as $key => $follower ) {
if ( $follower == $user_id ) {
unset( $followers[$key] );
$modified = true;
}
}
if ( $modified ) {
update_user_meta( $unfollow_user, '_pwuf_followers', $followers );
}
}
if ( $modified ) {
do_action( 'pwuf_post_unfollow_user', $user_id, $unfollow_user );
return true;
}
return false;
}
/**
* Retrieve following count
*
* Gets the total number of users that the specified user is following
*
* @access private
* @since 1.0
* @param int $user_id - the ID of the user to retrieve a count for
* @return int
* @param int|string|WP_User $user_id User ID or object.
* @return bool Whether the user exists
*/
function pwuf_get_following_count( $user_id = 0 ) {
if ( empty( $user_id ) ) {
$user_id = get_current_user_id();
}
$following = pwuf_get_following( $user_id );
$count = 0;
if ( $following ) {
$count = count( $following );
}
return (int) apply_filters( 'pwuf_get_following_count', $count, $user_id );
}
/**
* Retrieve follower count
*
* Gets the total number of users that are following the specified user
*
* @access private
* @since 1.0
* @param int $user_id - the ID of the user to retrieve a count for
* @return int
*/
function pwuf_get_follower_count( $user_id = 0 ) {
if ( empty( $user_id ) ) {
$user_id = get_current_user_id();
}
$followed_count = get_user_meta( $user_id, '_pwuf_followed_by_count', true );
$count = 0;
if ( $followed_count ) {
$count = $followed_count;
}
return (int) apply_filters( 'pwuf_get_follower_count', $count, $user_id );
}
/**
* Increase follower count
*
* Increments the total count for how many users a specified user is followed by
*
* @access private
* @since 1.0
* @param int $user_id - the ID of the user to increease the count for
* @return int
*/
function pwuf_increase_followed_by_count( $user_id = 0 ) {
do_action( 'pwuf_pre_increase_followed_count', $user_id );
$followed_count = pwuf_get_follower_count( $user_id );
if ( $followed_count !== false ) {
$new_followed_count = update_user_meta( $user_id, '_pwuf_followed_by_count', $followed_count + 1 );
} else {
$new_followed_count = update_user_meta( $user_id, '_pwuf_followed_by_count', 1 );
}
do_action( 'pwuf_post_increase_followed_count', $user_id );
return $new_followed_count;
}
/**
* Decrease follower count
*
* Decrements the total count for how many users a specified user is followed by
*
* @access private
* @since 1.0
* @param int $user_id - the ID of the user to decrease the count for
* @return int
*/
function pwuf_decrease_followed_by_count( $user_id ) {
do_action( 'pwuf_pre_decrease_followed_count', $user_id );
$followed_count = pwuf_get_follower_count( $user_id );
if ( $followed_count ) {
$count = update_user_meta( $user_id, '_pwuf_followed_by_count', ( $followed_count - 1 ) );
do_action( 'pwuf_post_increase_followed_count', $user_id );
}
return $count;
}
/**
* Check if a user is following another
*
* Increments the total count for how many users a specified user is followed by
*
* @access private
* @since 1.0
* @param int $user_id - the ID of the user doing the following
* @param int $followed_user - the ID of the user to check if being followed by $user_id
* @return int
*/
function pwuf_is_following( $user_id, $followed_user ) {
$following = pwuf_get_following( $user_id );
$ret = false; // is not following by default
if ( is_array( $following ) && in_array( $followed_user, $following ) ) {
$ret = true; // is following
}
return $ret;
}
scripts.php
<?php
/**
* Loads plugin scripts
*
* @access private
* @since 1.0
* @return void
*/
function pwuf_load_scripts() {
wp_enqueue_script( 'pwuf-follow', PWUF_FOLLOW_URL . 'js/follow.js', array( 'jquery' ) );
wp_localize_script( 'pwuf-follow', 'pwuf_vars', array(
'processing_error' => __( 'There was a problem processing your request.', 'pwuf' ),
'login_required' => __( 'Oops, you must be logged-in to follow users.', 'pwuf' ),
'logged_in' => is_user_logged_in() ? 'true' : 'false',
'ajaxurl' => admin_url( 'admin-ajax.php' ),
'nonce' => wp_create_nonce( 'follow_nonce' )
) );
}
add_action( 'wp_enqueue_scripts', 'pwuf_load_scripts' );