jQuery
后台使用php,前台引用jquery,实现增删操作,代码如下:
复制代码 代码如下:
header("Content-type: text/html; charset=utf-8");
//mysql_connect 建立连接,mysql_close($link)关闭非永久连接,mysql_pconnect 建立永久连接
//mysql_error返回mysql函数错误信息,mysql_errno返回mysql函数错误号码
//mysql_set_charset 设置用户端字符集,mysql_select_db 选择连接数据库
//mysql_query 执行查询,mysql_num_rows返回查询记录条数
//mysql_affected_rows返回受影响的记录条数,mysql_free_result 释放结果集内存
//mysql_fetch_row 返回列举阵列记录,mysql_fetch_assoc 返回关联阵列记录
//mysql_fetch_array 返回关联阵列或数字阵列记录,mysql_fetch_object 返回物件形式记录
//mysql_fetch_result 取得结果集资料
//%s 字符串,%c 一个ASCII字符,%d 一个整数,%u 一个符号数,%x 一个十六进制数
mysql_query("set charaset set utf-8");
$message=@$_POST["message"];
$shanchu=@$_POST["shanchu"];
$top_title="PHP基础练习";
$con=mysql_connect("localhost","root","");
//连接数据库
mysql_set_charset('utf-8',$con);
mysql_select_db("dbl",$con);
//定义数据库命令查询
$sql="select `message` ,`time`,`id` from message order by id desc limit 0,30";
//执行数据库查询
$rs=mysql_query($sql,$con);
$time=date('Y-m-d h:i:s',time());
//获取条数
$num_rows=mysql_num_rows($rs);//mysql_num_rows返回查询记录条数
if (isset($_POST["submits"])) {
if(!$_POST["message"]==null){
$queryinsert=sprintf("insert into message (message,time) values('%s','%s')",
$_POST['message'],$time);
mysql_query($queryinsert,$con);
}
if($_POST["message"]==null){
echo "";
}
header("Location:http://localhost/table.php");
}
if(isset($_GET["ClearTd"]) && intval($_GET['ClearTd'])){
$querydelete="delete from message where id=".$_GET['ClearTd'];
mysql_query($querydelete,$con);
header("Location:http://localhost/table.php");
}
?>
-
echo $tiao;
}?>
删除
{
?>

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
