php ajax 留言板

时间:2012-12-24 21:59来源:未知作者:admin 点击: 次

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php ajax 留言板提供一款国人写的php ajax 留言板,他是利用了jquery php mysql ajax来实现php ajax 局部刷新留方板实例的喜欢就下载吧。 php教程 ajax 留言板提供一款国人写的php ajax 留言板,他是利

php ajax 留言板提供一款国人写的php ajax 留言板,他是利用了jquery php mysql ajax来实现php ajax 局部刷新留方板实例的喜欢就下载吧。

php教程 ajax 留言板
提供一款国人写的php ajax 留言板,他是利用了jquery php mysql教程 ajax来实现php ajax 局部刷新留方板实例的喜欢就下载吧。
*/
$link = @mysql_connect($db_host,$db_user,$db_pass) or die('unable to establish a db connection');

mysql_query("set names 'utf8'");
mysql_select_db($db_database,$link);

class comment
{
private $data = array();

public function __construct($row)
{
  /*
  / the constructor
  */

  $this->data = $row;
}

public function markup()
{
  /*
  / this method outputs the xhtml markup of the comment
  */

  // setting up an alias, so we don't have to write $this->data every time:
  $d = &$this->data;

  $link_open = '';
  $link_close = '';

  if($d['url']){

   // if the person has entered a url when adding a comment,
   // define opening and closing hyperlink tags

   $link_open = '<a href="'.$d['url'].'">';
   $link_close = '</a>';
  }

  // converting the time to a unix timestamp:
  $d['dt'] = strtotime($d['dt']);

  // needed for the default gravatar image:
  $url = 'http://'.dirname($_server['server_name'].$_server["request_uri"]).'/img/default_avatar.gif';

  return '

   <div class="comment">
    <div class="avatar">
     '.$link_open.'
     <img src="http://www.gravatar.com/avatar/'.md5($d['email']).'?size=50&default='.urlencode($url).'" />
     '.$link_close.'
    </div>

    <div class="name">'.$link_open.$d['name'].$link_close.'</div>
    <div class="date" title="added at '.date('h:i on d m y',$d['dt']).'">'.date('d m y',$d['dt']).'</div>
    <p>'.$d['body'].'</p>
   </div>
  ';
}

public static function validate(&$arr)
{
  /*
  / this method is used to validate the data sent via ajax.
  /
  / it return true/false depending on whether the data is valid, and populates
  / the $arr array passed as a paremter (notice the ampersand above) with
  / either the valid input data, or the error messages.
  */

  $errors = array();
  $data = array();

  // using the filter_input function introduced in php 5.2.0

  if(!($data['email'] = filter_input(input_post,'email',filter_validate_email)))
  {
   $errors['email'] = 'please enter a valid email.';
  }

  if(!($data['url'] = filter_input(input_post,'url',filter_validate_url)))
  {
   // if the url field was not populated with a valid url,
   // act as if no url was entered at all:

   $url = '';
  }

  // using the filter with a custom callback function:

  if(!($data['body'] = filter_input(input_post,'body',filter_callback,array('options'=>'comment::validate_text'))))
  {
   $errors['body'] = 'please enter a comment body.';
  }

  if(!($data['name'] = filter_input(input_post,'name',filter_callback,array('options'=>'comment::validate_text'))))
  {
   $errors['name'] = 'please enter a name.';
  }

  if(!empty($errors)){

   // if there are errors, copy the $errors array to $arr:

   $arr = $errors;
   return false;
  }

  // if the data is valid, sanitize all the data and copy it to $arr:

  foreach($data as $k=>$v){
   $arr[$k] = mysql_real_escape_string($v);
  }

  // ensure that the email is lower case:

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

  return true;

}

private static function validate_text($str)
{
  /*
  / this method is used internally as a filter_callback
  */

  if(mb_strlen($str,'utf8')<1)
   return false;

  // encode all html special characters (<, >, ", & .. etc) and convert
  // the new line characters to <br> tags:

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

  // remove the new line characters that are left
  $str = str_replace(array(chr(10),chr(13)),'',$str);

  return $str;
}

}

$comments = array();
$result = mysql_query("select * from comments order by id asc");

while($row = mysql_fetch_assoc($result))
{
$comments[] = new comment($row);
}

<!doctype html public "-//w3c//dtd xhtml 1.0 strict//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=gb2312" />
<title>simple ajax commenting system | tutorialzine demo</title>

</head>

<body>

<?php

/*
/ output the comments one by one:
*/

foreach($comments as $c){
echo $c->markup();
}

<div id="addcommentcontainer">
<p>add a comment</p>
<form id="addcommentform" method="post" action="">
    <div>
        <label for="name">your name</label>
        <input type="text" name="name" id="name" />

            <label for="email">your email</label>
            <input type="text" name="email" id="email" />

            <label for="url">website (not required)</label>
            <input type="text" name="url" id="url" />

            <label for="body">comment body</label>
            <textarea name="body" id="body" cols="20" rows="5"></textarea>

            <input type="submit" id="submit" value="submit" />
        </div>
    </form>
</div>

</div>

</body>
</html>

数据库教程结构

--
-- table structure for table `comments`
--

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 '0000-00-00',
primary key (`id`)
) engine=myisam default charset=utf8 collate=utf8_unicode_ci;

源码下载

http://down.111cn.net/down/code/php/liuyanboke/2010/1028/21479.html