首先在文章列表页面(list.php),将多选筐命名为:“$del_id[]”,值为文章ID号。 例如(list.php):
- form name='del_form' action='del.php'
method='post'> - ?php
- $result=mysql_query('select * from news');
- while($rs=mysql_fetch_array($result)){
- ?>
-
input name='del_id[]' type='checkbox'
id='del_id[]' value='' /> - ?=$rs[title]?>
- ?php
- }
- ?>
- /form>
- 2、处理页面(del.php):
- ?php
- if($del_id!=''){
- $del_num=count($del_id);
- for($i=0;$i $del_num;$i++){
-
mysql_query('Delete from news where
id='$del_id[$i]''); - }
-
echo(' script type='text/javascript'>
alert('删除成功!');history.back(); /script>'); - }else{
-
echo(' script type='text/javascript'>
alert('请先选择项目!');history.back(); /script>'); - }
- ?>
1.PHP批量删除数据首先引入jquery脚本库
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span> </span><span class="tag-name">script</span><span> </span><span class="attribute">language</span><span>=</span><span class="attribute-value">'JavaScript'</span><span> <br></span><span class="attribute">type</span><span>=</span><span class="attribute-value">'text/javascript'</span><span> <br></span><span class="attribute">src</span><span>=</span><span class="attribute-value">'http://jqueryjs.googlecode.<br>com/files/jquery-1.3.2.min.js'</span><span class="tag">></span><span> </span></span></span></li> <li><span class="tag"><span> /script</span><span class="tag">></span><span> </span></span></li> </ol>
将下列代码加上
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span> </span><span class="tag-name">script</span><span> </span><span class="attribute">language</span><span>=</span><span class="attribute-value">'JavaScript'</span><span> <br></span><span class="attribute">type</span><span>=</span><span class="attribute-value">'text/javascript'</span><span class="tag">></span><span> </span></span></span></li> <li><span>$(document).ready(function() </span></li> <li class="alt"><span>{ </span></li> <li> <span>$('input[</span><span class="attribute">id</span><span>=</span><span class="attribute-value">'del'</span><span>]').click(function() </span> </li> <li class="alt"><span>{ </span></li> <li> <span>var </span><span class="attribute">del_arry</span><span>=</span><span class="attribute-value">''</span><span>; </span> </li> <li class="alt"> <span>$('input[</span><span class="attribute">name</span><span>=</span><span class="attribute-value">'del_id[]'</span><span>][checked]')<br>.each(function(){ </span> </li> <li> <span class="attribute">del_arry</span><span class="attribute-value">del_arry</span><span>=del_arry+$(this).val()+','; </span> </li> <li class="alt"><span>}); </span></li> <li><span>if (del_arry!='') </span></li> <li class="alt"><span>{ </span></li> <li><span>$.post('com_del.php', {value:''+<br>del_arry+''}, function(data){ </span></li> <li class="alt"> <span>if(</span><span class="attribute">data</span><span>==1) { </span> </li> <li><span>window.location.reload(); </span></li> <li class="alt"><span>alert(' 删除成功!'); </span></li> <li> <span>}else if(</span><span class="attribute">data</span><span>==2){ </span> </li> <li class="alt"><span>alert('删除失败!'); </span></li> <li><span>} </span></li> <li class="alt"><span>}); </span></li> <li><span>} </span></li> <li class="alt"><span>}); </span></li> <li><span>}); </span></li> <li class="alt"><span class="tag"><span> /script</span><span class="tag">></span><span> </span></span></li> </ol>
2.com_shen.php(下面的部分可以自己发挥,用你自己的数据库连接和处理方法)
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span> ?php </span></span></span></li> <li><span>include '../cyr/inc/conn.php'; </span></li> <li class="alt"><span>include '../cyr/inc/page.class.php'; </span></li> <li> <span>$</span><span class="attribute">conn</span><span> = </span><span class="attribute-value">new</span><span> DB(); </span> </li> <li class="alt"> <span>$conn-</span><span class="tag">></span><span> Connection(); </span> </li> <li> <span>$</span><span class="attribute">array</span><span> = $_POST['value']; </span> </li> <li class="alt"><span>//将所选的值组成的数组放入$array数组 </span></li> <li> <span>$</span><span class="attribute">array</span><span>=</span><span class="attribute-value">split</span><span> (',', $array); </span> </li> <li class="alt"><span>if(!empty($array)){ </span></li> <li> <span>$</span><span class="attribute">del_num</span><span>=</span><span class="attribute-value">count</span><span>($array); </span> </li> <li class="alt"> <span>for($</span><span class="attribute">ii</span><span>=</span><span class="attribute-value">0</span><span>;$ii</span><span class="tag"><span> $del_num;$ii++){ </span></span> </li> <li> <span>$conn-</span><span class="tag">></span><span class="attribute">str</span><span> = </span><span class="attribute-value">'update yj_comment set<br> co_shenhe=1 where id='</span><span>.$array[$ii]; </span> </li> <li class="alt"> <span>$conn-</span><span class="tag">></span><span>getResult(); </span> </li> <li><span>} </span></li> <li class="alt"> <span>echo $</span><span class="attribute">string</span><span> = </span><span class="attribute-value">1</span><span>; </span> </li> <li><span>}else{ </span></li> <li class="alt"> <span>echo $</span><span class="attribute">string</span><span> =</span><span class="attribute-value">2</span><span>; </span> </li> <li><span>} </span></li> <li class="alt"> <span>$conn-</span><span class="tag">></span><span>ColseConnection(); </span> </li> <li> <span class="tag">?></span><span> </span> </li> </ol>
以上就是PHP批量删除数据的相关实现方法。

tostartaphpsession,usesesses_start()attheScript'Sbeginning.1)placeitbeforeanyOutputtosetThesessionCookie.2)useSessionsforuserDatalikeloginstatusorshoppingcarts.3)regenerateSessiveIdStopreventFentfixationAttacks.s.4)考虑使用AttActAcks.s.s.4)

会话再生是指在用户进行敏感操作时生成新会话ID并使旧ID失效,以防会话固定攻击。实现步骤包括:1.检测敏感操作,2.生成新会话ID,3.销毁旧会话ID,4.更新用户端会话信息。

PHP会话对应用性能有显着影响。优化方法包括:1.使用数据库存储会话数据,提升响应速度;2.减少会话数据使用,只存储必要信息;3.采用非阻塞会话处理器,提高并发能力;4.调整会话过期时间,平衡用户体验和服务器负担;5.使用持久会话,减少数据读写次数。

PHPsessionsareserver-side,whilecookiesareclient-side.1)Sessionsstoredataontheserver,aremoresecure,andhandlelargerdata.2)Cookiesstoredataontheclient,arelesssecure,andlimitedinsize.Usesessionsforsensitivedataandcookiesfornon-sensitive,client-sidedata.

phpientifiesauser'ssessionusessessionSessionCookiesAndSessionIds.1)whiwSession_start()被称为,phpgeneratesainiquesesesessionIdStoredInacookInAcookInamedInAcienamedphpsessidontheuser'sbrowser'sbrowser.2)thisIdAllowSphptptpptpptpptpptortoreTessessionDataAfromtheserverMtheserver。

PHP会话的安全可以通过以下措施实现:1.使用session_regenerate_id()在用户登录或重要操作时重新生成会话ID。2.通过HTTPS协议加密传输会话ID。3.使用session_save_path()指定安全目录存储会话数据,并正确设置权限。

phpsessionFilesArestoredIntheDirectorySpecifiedBysession.save_path,通常是/tmponunix-likesystemsorc:\ windows \ windows \ temponwindows.tocustomizethis:tocustomizEthis:1)useession_save_save_save_path_path()


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