简单的ajax评论完整代码

发布时间：2020-12-16 00:50:34 所属栏目：百科来源：网络整理

导读：简单的ajax评论完整代码数据库结构CREATE TABLE `comments` ( `id` int(10) unsigned NOT NULL auto_increment, `name` varchar(128) collate utf8_unicode_ci NOT NULL default '', `url` varchar(255) collate utf8_unicode_ci NOT NULL default '', `ema

简单的ajax评论完整代码

数据库结构CREATE TABLE `comments` (

`id` int(10) unsigned NOT NULL auto_increment,

`name` varchar(128) collate utf8_unicode_ci NOT NULL default '',

`url` varchar(255) collate utf8_unicode_ci NOT NULL default '',

`email` varchar(255) collate utf8_unicode_ci NOT NULL default '',

`body` text collate utf8_unicode_ci NOT NULL,

`dt` timestamp NOT NULL default CURRENT_TIMESTAMP,

PRIMARY KEY (`id`)

) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=1;

演示

 
  PHP Code 
 
 
  <?php
//Errorreporting:
error_reporting(E_ALL^E_NOTICE);
include"conn.php";
include"comment.class.php";
/*
/Selectallthecommentsandpopulatethe$commentsarraywithobjects
*/
$comments=array();
$result=mysql_query("SELECT*FROMcommentsORDERBYidASC");
while($row=mysql_fetch_assoc($result))
{
$comments[]=newComment($row);
}
?>
 
 

<divid="main">

/Outputthecommentsonebyone:

foreach($commentsas$c){

echo$c->markup();

}

<divid="addCommentContainer">

<p>AddaComment</p>

<formid="addCommentForm"method="post"action="">

<div>

<labelfor="name">YourName</label>

<inputtype="text"name="name"id="name"/>

<labelfor="email">YourEmail</label>

<inputtype="text"name="email"id="email"/>

<labelfor="url">Website(notrequired)</label>

<inputtype="text"name="url"id="url"/>

<labelfor="body">CommentBody</label>

<textareaname="body"id="body"cols="20"rows="5"></textarea>

<inputtype="submit"id="submit"value="Submit"/>

</div>

</form>

</div>

submit.php

/Thisarrayisgoingtobepopulatedwitheither

/thedatathatwassenttothescript,orthe

/errormessages.

/*/

$arr=array();

$validates=Comment::validate($arr);

if($validates)

{

/*EverythingisOK,inserttodatabase:*/

mysql_query("INSERTINTOcomments(name,url,email,body)

VALUES(

'".$arr['name']."',

'".$arr['url']."',

'".$arr['email']."',0);">'".$arr['body']."'

)");

$arr['dt']=date('r',time());

$arr['id']=mysql_insert_id();

/Thedatain$arrisescapedforthemysqlquery,0);">/butweneedtheunescapedvariables,soweapply,0);">/stripslashestoalltheelementsinthearray:

$arr=array_map('stripslashes',$arr);

$insertedComment=newComment(/*Outputtingthemarkupofthejust-insertedcomment:*/

echojson_encode(array('status'=>1,'html'=>$insertedComment->markup()));

else

/*Outputtngtheerrormessages*/

echo'{"status":0,"errors":'.json_encode($arr).'}';

comment.class.php

classComment

private$data=array();

publicfunction__construct($row)

/Theconstructor

$this->data=$row;

publicfunctionmarkup()

/ThismethodoutputstheXHTMLmarkupofthecomment

//Settingupanalias,sowedon'thavetowrite$this->dataeverytime:

$d=&$this->data;

$link_open='';

$link_close='';

if($d['url']){

//IfthepersonhasenteredaURLwhenaddingacomment,0);">//defineopeningandclosinghyperlinktags

$link_open='<ahref="'.$d['url'].'">';

$link_close='</a>';

}

//ConvertingthetimetoaUNIXtimestamp:

$d['dt']=strtotime($d['dt']);

//Neededforthedefaultgravatarimage:

$url='http://'.dirname($_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]).'/img/default_avatar.gif';

return'

<divclass="comment">

<divclass="avatar">

'.$link_open.'

<imgsrc=""/>

'.$link_close.'

<divclass="name">'.$link_open.$d['name'].$link_close.'</div>

<divclass="date"title="Addedat'.date('H:iondMY',$d['dt']).'">'.date('dMY',$d['dt']).'</div>

</div>

publicstaticfunctionvalidate(&$arr)

{

/ThismethodisusedtovalidatethedatasentviaAJAX.

/Itreturntrue/falsedependingonwhetherthedataisvalid,andpopulates

/the$arrarraypassedasaparemter(noticetheampersandabove)with

/eitherthevalidinputdata,ortheerrormessages.

$errors=array();

$data=array();

//Usingthefilter_inputfunctionintroducedinPHP5.2.0

if(!($data['email']=filter_input(INPUT_POST,'email',FILTER_VALIDATE_EMAIL)))

{

$errors['email']='PleaseenteravalidEmail.';

if(!($data['url']=filter_input(INPUT_POST,'url',FILTER_VALIDATE_URL)))

//IftheURLfieldwasnotpopulatedwithavalidURL,0);">//actasifnoURLwasenteredatall:

$url='';

//Usingthefilterwithacustomcallbackfunction:

if(!($data['body']=filter_input(INPUT_POST,'body',FILTER_CALLBACK,array('options'=>'Comment::validate_text'))))

$errors['body']='Pleaseenteracommentbody.';

}

if(!($data['name']=filter_input(INPUT_POST,'name',array('options'=>'Comment::validate_text'))))

$errors['name']='Pleaseenteraname.';

if(!empty($errors)){

//Ifthereareerrors,copythe$errorsarrayto$arr:

$arr=$errors;

returnfalse;

//Ifthedataisvalid,sanitizeallthedataandcopyitto$arr:

foreach($dataas$k=>$v){

$arr[$k]=mysql_real_escape_string($v);

//Ensurethattheemailislowercase:

$arr['email']=strtolower(trim($arr['email']));

returntrue;

privatestaticfunctionvalidate_text($str)

/ThismethodisusedinternallyasaFILTER_CALLBACK

if(mb_strlen($str,'utf8')<1)

//Encodeallhtmlspecialcharacters(<,>,",&..etc)andconvert

//thenewlinecharactersto<br>tags:

$str=nl2br(htmlspecialchars($str));

//Removethenewlinecharactersthatareleft

$str=str_replace(array(chr(10),chr(13)),'',0);">$str);

return$str;

原文地址:http://www.freejs.net/article_biaodan_70.html

（编辑：李大同）

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