wordpress 为主题增加AJAX提交评论性能的php代码

2022-03-29 收藏 0 点赞 0 图文教程

首先需求在主题的function.php文件里增加一段函数：

 
< ?php 
function fail($s) { 
header('HTTP/1.0 500 Internal Server Error'); 
echo $s; 
exit; 
} 
function ajax_comment(){ 
if($_POST['action'] == 'ajax_comment') { 
global $wpdb, $db_check; 
// Check DB 
if(!$wpdb->dbh) { 
echo('Our database has issues. Try again later.'); 
die(); 
} 
nocache_headers(); 
$comment_post_ID = (int) $_POST['comment_post_ID']; 
$status = $wpdb->get_row("SELECT post_status, comment_status FROM $wpdb->posts WHERE ID = '$comment_post_ID'"); 
if ( empty($status->comment_status) ) { 
do_action('comment_id_not_found', $comment_post_ID); 
fail('The post you are trying to comment on does not currently exist in the database.'); 
} elseif ( 'closed' == $status->comment_status ) { 
do_action('comment_closed', $comment_post_ID); 
fail('Sorry, comments are closed for this item.'); 
} elseif ( in_array($status->post_status, array('draft', 'pending') ) ) { 
do_action('comment_on_draft', $comment_post_ID); 
fail('The post you are trying to comment on has not been published.'); 
} 
$comment_author = trim(strip_tags($_POST['author'])); 
$comment_author_email = trim($_POST['email']); 
$comment_author_url = trim($_POST['url']); 
$comment_content = trim($_POST['comment']); 
// If the user is logged in 
$user = wp_get_current_user(); 
if ( $user->ID ) { 
$comment_author = $wpdb->escape($user->display_name); 
$comment_author_email = $wpdb->escape($user->user_email); 
$comment_author_url = $wpdb->escape($user->user_url); 
if ( current_user_can('unfiltered_html') ) { 
if ( wp_create_nonce('unfiltered-html-comment_' . $comment_post_ID) != $_POST['_wp_unfiltered_html_comment'] ) { 
kses_remove_filters(); // start with a clean slate 
kses_init_filters(); // set up the filters 
} 
} 
} else { 
if ( get_option('comment_registration') ) 
fail('Sorry, you must be logged in to post a comment.'); 
} 
$comment_type = ''; 
if ( get_option('require_name_email') && !$user->ID ) { 
if ( 6> strlen($comment_author_email) || '' == $comment_author ) 
fail('Sorry: please fill the required fields (name, email).'); 
elseif ( !is_email($comment_author_email)) 
fail('Sorry: please enter a valid email address.'); 
} 
if ( '' == $comment_content ) 
fail('Sorry: please type a comment.'); 
// Simple duplicate check 
$dupe = "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = '$comment_post_ID' AND ( comment_author = '$comment_author' "; 
if ( $comment_author_email ) $dupe .= "OR comment_author_email = '$comment_author_email' "; 
$dupe .= ") AND comment_content = '$comment_content' LIMIT 1"; 
if ( $wpdb->get_var($dupe) ) { 
fail('Duplicate comment detected; it looks as though you\'ve already said that!'); 
} 
$commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type', 'user_ID'); 
if( !$user->ID ){ 
$result_set = $wpdb->get_results("SELECT display_name, user_email FROM $wpdb->users WHERE display_name = '" . $comment_author . "' OR user_email = '" . $comment_author_email . "'"); 
if ($result_set) { 
if ($result_set[0]->display_name == $comment_author){ 
fail( __('Error: you are not allowed to use the nickname that you entered.if you are the administrator you hava to login to comment.','philna2') ); 
} else { 
fail( __('Error: you are not allowed to use the email that you entered.if you are the administrator you hava to login to comment.','philna2') ); 
} 
} 
} 
$comment_id = wp_new_comment( $commentdata ); 
$comment = get_comment($comment_id); 
if( !$user->ID ){ 
setcookie('comment_author_' . COOKIEHASH, $comment->comment_author, time() + 30000000, COOKIEPATH, COOKIE_DOMAIN); 
setcookie('comment_author_email_' . COOKIEHASH, $comment->comment_author_email, time() + 30000000, COOKIEPATH, COOKIE_DOMAIN); 
setcookie('comment_author_url_' . COOKIEHASH, clean_url($comment->comment_author_url), time() + 30000000, COOKIEPATH, COOKIE_DOMAIN); 
} 
@header('Content-type: ' . get_option('html_type') . '; charset=' . get_option('blog_charset')); 
?> 
//这里需求粘贴你的评论框架代码，不过相干的调用代码有所变动： 
//评论ID：$comment->comment_ID 
//评论者名字：$comment->comment_author 
//判别评论者能否填写了网站地址：$comment->get_comment_author_url 
//评论者URL：$comment->comment_author_url 
//评论工夫：mysql2date(__('F jS, Y'),$comment->comment_date) 
//评论者e-mail：$comment->comment_author_email 
//评论内容$comment->comment_content 
< ?php 
die(); 
} 
} 
add_action('init', 'ajax_comment'); 
//增加AJAX评论钩子 
?>

假如解决评论内容里的换行符的话，$comment->comment_content需做以下解决：

 
< ?php 
$aj_order = array("\r\n", "\n", "\r"); 
$aj_comment_content = str_replace($aj_order,'
',$comment->comment_content); 
echo $aj_comment_content; 
?>

用jQuery写提交评论时的脚本，这也是要害的局部：

 
jQuery(document).ready(function() { 
if (jQuery('#commentform').length) { 
jQuery('#commentform').submit(function(){ //ID为 commentform 的表单提交时发作的函数，也就是整个留言输出框 form 的ID。 
var ajaxCommentsURL = window.location.href; 
jQuery.ajax({ 
url: ajaxCommentsURL, 
data: jQuery('#commentform').serialize()+'&action=ajax_comment', 
type: 'POST', 
beforeSend: function() { 
jQuery('#commenterror').hide(); 
var submit='<p id="commentload" style="display: none;background: url("img/spinner.gif") no-repeat scroll 0 50%;margin: 0 auto;">Submitting Comment...</p>'; //创立名为 submit 的字符串，稍后拔出，这里的款式大家本人依据需求定义，那个背景图片本人去下哈。 
var error='<p id="commenterror" style="display: none;margin: 0 auto;">Posted comment fail.</p>'; //创立名为 error 的字符串 
jQuery('#comments').after(submit); // 在ID为 comments 的元素后拔出刚定义的 submit 
jQuery('#comments').after(error); // 同样拔出刚定义的 error 
jQuery('#commentload').slideDown(); // 让submit 向下滑出 
}, 
error: function(request) { //发作谬误时 
jQuery('#commentload').hide(); //暗藏 submit 
jQuery('#commenterror').show("slow").html(request.responseText); //显示 error 
}, 
success: function(data) { 
jQuery('textarea').each(function(){ 
this.value=''; 
}); 
jQuery('#commenterror').hide().html(); 
if (!jQuery('#thecomments').length) { 
jQuery('#pinglist').before('<ol id="thecomments"></ol>');} 
jQuery('#thecomments').append(data); //向ID为 thecomments 的元素增加数据，也就是整个 ol 或 ul 
var new_comment = jQuery('#thecomments li:last').hide(); //让**增加的数据暗藏 
new_comment.slideDown(1000); //再显示，这里是为了完成滑出的成果，不想要也能够间接显示 
jQuery('#commentform:input').attr('disabled', true); 
jQuery('#commentload').slideUp("slow"); 
jQuery('#messagebox').slideUp("slow"); //这是针对我模版而加的，由于我模版在没有留言时会有个 nocomment 的元素，我要让增加一条留言后他主动暗藏，要不然会矛盾，呵呵，这个能够自行抉择要或不要 
setTimeout(function() { 
jQuery('#commentform:input').removeAttr('disabled'); 
}, 10000); //这里是设置10秒之后才能够再次留言，自行设置，单位毫秒。 
} 
}); 
return false; 
} ); 
}})