Ajax
分页的首页
复制代码 代码如下:
武侠小说分页
<script><BR>var page='';<BR> function init(page){<BR> document.getElementById("tables").innerHTML='';<BR> var xhr;<BR> if(window.XMLHttpRequest){<BR> xhr = new XMLHttpRequest();<BR>}else if(window.ActiveXObject){<BR> xhr =new ActiveXObject("Microsoft.XMLHTTP")<BR>}<BR>var url="fenye.php";<BR> xhr.open("POST",url,true);<BR> xhr.onreadystatechange=callback;<BR> xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded");<BR> if(page){<BR> xhr.send("page="+page);<BR> }<BR> else {xhr.send("page=1");}<BR> var content;<BR> function callback(){<BR> if(xhr.readyState==4){<BR> if(xhr.status==200){<BR> var json =eval('('+xhr.responseText+')');<BR> //alert(xhr.responseText);<BR> var fenye=json.str;<BR> // alert(fenye);<BR> document.getElementById('div').innerHTML=fenye;<BR> content="<th>ID<th>名称<th>作者<th>出版社<th>ISBN号<th>类型<th>价格";<BR> for(var i=0;i<json.info.length;i++){<BR> content+="<tr><td>"+json.info[i].id+"<td>"+json.info[i].name+"<td>"+json.info[i].author+"<td>"+json.info[i].publisher+"<td>"+json.info[i].isbn+"<td>"+json.info[i].type+"<td>"+json.info[i].price+"";<BR> document.getElementById("tables").innerHTML=content;<BR> }<BR> // alert(fenye);<BR> }<BR> }<BR> }<BR> }<br><br></script>
jquery实现$.ajax的分页
ID | 名称 | 作者 | 出版社 | ISBN号 | 类型 | 价格 |
---|
|
|
分页的php精华代码
复制代码 代码如下:
//命令模型层处理数据
$link=mysql_connect('localhost','root','') or die("失败");
mysql_select_db('books',$link) or die("连接数据库出错了!");
//每页显示记录数
$pagesize = 2;
//求出总的记录数
$sql = "select count(*) as total_rows from books";
$result = mysql_query($sql);
$total_rows = mysql_fetch_array($result);
//求总共的页码数
$pages = ceil($total_rows[0]/$pagesize);
//当前第几页
$page = $_POST['page'];
$strtext = "当前第".$page."页"."总共".$pages."页"."共".$total_rows[0]."记录";
//var_dump($str);
//接下来,我要根据当前点击的页码求出对应的数据
$offset = $pagesize*($page-1);
$sql = "select * from books limit $offset,$pagesize";
mysql_query("set names utf8");
$res=mysql_query($sql);
$rows=array();
while($row=mysql_fetch_assoc($res)){
$rows[]=$row;
}
$pageInfo = $rows;
//echo json_encode($pageInfo);
//var_dump($pageInfo);
//将获得数据链接,后返回
$first=1;
$prev=$page-1;
$next=$page+1;
$last=$pages;
//命令视图层显示数据
$first_a = "";
if($page>1){
$prev_a = "";
}
if($page $next_a = "";
}
$last_a = "";
@$str = $strtext.$first_a.$prev_a.$next_a.$last_a;
//var_dump($str);
$info = array('str'=>$str,'info'=>$pageInfo);
echo json_encode($info);

ThesecrettokeepingaPHP-poweredwebsiterunningsmoothlyunderheavyloadinvolvesseveralkeystrategies:1)ImplementopcodecachingwithOPcachetoreducescriptexecutiontime,2)UsedatabasequerycachingwithRedistolessendatabaseload,3)LeverageCDNslikeCloudflareforservin

You should care about DependencyInjection(DI) because it makes your code clearer and easier to maintain. 1) DI makes it more modular by decoupling classes, 2) improves the convenience of testing and code flexibility, 3) Use DI containers to manage complex dependencies, but pay attention to performance impact and circular dependencies, 4) The best practice is to rely on abstract interfaces to achieve loose coupling.

Yes,optimizingaPHPapplicationispossibleandessential.1)ImplementcachingusingAPCutoreducedatabaseload.2)Optimizedatabaseswithindexing,efficientqueries,andconnectionpooling.3)Enhancecodewithbuilt-infunctions,avoidingglobalvariables,andusingopcodecaching

ThekeystrategiestosignificantlyboostPHPapplicationperformanceare:1)UseopcodecachinglikeOPcachetoreduceexecutiontime,2)Optimizedatabaseinteractionswithpreparedstatementsandproperindexing,3)ConfigurewebserverslikeNginxwithPHP-FPMforbetterperformance,4)

APHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.

Select DependencyInjection (DI) for large applications, ServiceLocator is suitable for small projects or prototypes. 1) DI improves the testability and modularity of the code through constructor injection. 2) ServiceLocator obtains services through center registration, which is convenient but may lead to an increase in code coupling.

PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

PHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl


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DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
