最基础的PHP分类查询程序,php分类查询程序
<span>最初级的PHP分类查询程序 </span><!DOCTYPE html <span>PUBLIC</span> "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> </head> <body> <div align="center"><form action="<?php <span>$_SERVER</span>['PHP_SELF'];?>" method="post"><input type="submit" name="sell" value="智慧销售" /> &<span>nbsp; </span><input type="submit" name="manager" value="经营管理"/> <input type="submit" name="serve" value="智慧客服" /> <input type="submit" name="newemployee" value="智慧新员工" /> <<span>input type</span>="submit" name="development" value="个人发展" /></form> <?<span>php </span><span>if</span>(!<span>empty</span>(<span>$_POST</span>['sell'<span>])){ </span><span>$conn</span>=<span>mysql_connect</span>("localhost","root","root"<span>); </span><span>if</span>(!<span>$conn</span><span>){ </span><span>die</span>('Could not connect the database!'<span>); } </span><span>mysql_query</span>("SET NAMES UTF8"<span>); </span><span>mysql_query</span>("set character_set_client=utf8"<span>); </span><span>mysql_query</span>("set character_set_results=utf8"<span>); </span><span>mysql_select_db</span>("test",<span>$conn</span><span>); </span><span>$sql</span>="select * from ts1 where name like '%智慧销售%' "<span>; </span><span>$result</span>=<span>mysql_query</span>(<span>$sql</span><span>); </span><span>echo</span> '<table height="60%" width="60%" border="1" align="center">'<span>; </span><span>while</span>(<span>$row</span>=<span>mysql_fetch_assoc</span>(<span>$result</span><span>)){ </span><span>echo</span> '<tr height="45px">'<span>; </span><span>echo</span> '<td>'.<span>$row</span>['id'].'</td>'.'<td>'.<span>$row</span>['name'].'</td>'.'<td>'.<span>$row</span>['image'].'</td>'<span>; </span><span>echo</span> '</tr>'<span>; } </span><span>echo</span> '</table>'<span>; </span><span>mysql_close</span>(<span>$conn</span><span>); } / / http://www.pprar.com </span>?> <?<span>php </span><span>if</span>(!<span>empty</span>(<span>$_POST</span>['serve'<span>])){ </span><span>$conn</span>=<span>mysql_connect</span>("localhost","root","root"<span>); </span><span>if</span>(!<span>$conn</span><span>){ </span><span>die</span>('Could not connect the database!'<span>); } </span><span>mysql_query</span>("SET NAMES UTF8"<span>); </span><span>mysql_query</span>("set character_set_client=utf8"<span>); </span><span>mysql_query</span>("set character_set_results=utf8"<span>); </span><span>mysql_select_db</span>("test",<span>$conn</span><span>); </span><span>$sql</span>="select * from ts1 where name like '%智慧客服%' "<span>; </span><span>$result</span>=<span>mysql_query</span>(<span>$sql</span><span>); </span><span>echo</span> '<table height="60%" width="60%" border="1" align="center">'<span>; </span><span>while</span>(<span>$row</span>=<span>mysql_fetch_assoc</span>(<span>$result</span><span>)){ </span><span>echo</span> '<tr height="45px">'<span>; </span><span>echo</span> '<td>'.<span>$row</span>['id'].'</td>'.'<td>'.<span>$row</span>['name'].'</td>'.'<td>'.<span>$row</span>['image'].'</td>'<span>; </span><span>echo</span> '</tr>'<span>; } </span><span>echo</span> '</table>'<span>; </span><span>mysql_close</span>(<span>$conn</span><span>); } </span>?> <?<span>php </span><span>if</span>(!<span>empty</span>(<span>$_POST</span>['manager'<span>])){ </span><span>$conn</span>=<span>mysql_connect</span>("localhost","root","root"<span>); </span><span>if</span>(!<span>$conn</span><span>){ </span><span>die</span>('Could not connect the database!'<span>); } </span><span>mysql_query</span>("SET NAMES UTF8"<span>); </span><span>mysql_query</span>("set character_set_client=utf8"<span>); </span><span>mysql_query</span>("set character_set_results=utf8"<span>); </span><span>mysql_select_db</span>("test",<span>$conn</span><span>); </span><span>$sql</span>="select * from ts1 where name like '%经营管理%' "<span>; </span><span>$result</span>=<span>mysql_query</span>(<span>$sql</span><span>); </span><span>echo</span> '<table height="60%" width="60%" border="1" align="center">'<span>; </span><span>while</span>(<span>$row</span>=<span>mysql_fetch_assoc</span>(<span>$result</span><span>)){ </span><span>echo</span> '<tr height="45px">'<span>; </span><span>echo</span> '<td>'.<span>$row</span>['id'].'</td>'.'<td>'.<span>$row</span>['name'].'</td>'.'<td>'.<span>$row</span>['image'].'</td>'<span>; </span><span>echo</span> '</tr>'<span>; } </span><span>echo</span> '</table>'<span>; </span><span>mysql_close</span>(<span>$conn</span><span>); } </span>?> <?<span>php </span><span>if</span>(!<span>empty</span>(<span>$_POST</span>['newemployee'<span>])){ </span><span>$conn</span>=<span>mysql_connect</span>("localhost","root","root"<span>); </span><span>if</span>(!<span>$conn</span><span>){ </span><span>die</span>('Could not connect the database!'<span>); } </span><span>mysql_query</span>("SET NAMES UTF8"<span>); </span><span>mysql_query</span>("set character_set_client=utf8"<span>); </span><span>mysql_query</span>("set character_set_results=utf8"<span>); </span><span>mysql_select_db</span>("test",<span>$conn</span><span>); </span><span>$sql</span>="select * from ts1 where name like '%智慧新员工%'"<span>; </span><span>$result</span>=<span>mysql_query</span>(<span>$sql</span><span>); </span><span>echo</span> '<table height="60%" width="60%" border="1" align="center">'<span>; </span><span>while</span>(<span>$row</span>=<span>mysql_fetch_assoc</span>(<span>$result</span><span>)){ </span><span>echo</span> '<tr height="45px">'<span>; </span><span>echo</span> '<td>'.<span>$row</span>['id'].'</td>'.'<td>'.<span>$row</span>['name'].'</td>'.'<td>'.<span>$row</span>['image'].'</td>'<span>; </span><span>echo</span> '</tr>'<span>; } </span><span>echo</span> '</table>'<span>; </span><span>mysql_close</span>(<span>$conn</span><span>); } </span>?> <?<span>php </span><span>if</span>(!<span>empty</span>(<span>$_POST</span>['development'<span>])){ </span><span>$conn</span>=<span>mysql_connect</span>("localhost","root","root"<span>); </span><span>if</span>(!<span>$conn</span><span>){ </span><span>die</span>('Could not connect the database!'<span>); } </span><span>mysql_query</span>("SET NAMES UTF8"<span>); </span><span>mysql_query</span>("set character_set_client=utf8"<span>); </span><span>mysql_query</span>("set character_set_results=utf8"<span>); </span><span>mysql_select_db</span>("test",<span>$conn</span><span>); </span><span>$sql</span>="select * from ts1 where name like '%个人发展%' "<span>; </span><span>$result</span>=<span>mysql_query</span>(<span>$sql</span><span>); </span><span>echo</span> '<table height="60%" width="60%" border="1" align="center">'<span>; </span><span>while</span>(<span>$row</span>=<span>mysql_fetch_assoc</span>(<span>$result</span><span>)){ </span><span>echo</span> '<tr height="45px">'<span>; </span><span>echo</span> '<td>'.<span>$row</span>['id'].'</td>'.'<td>'.<span>$row</span>['name'].'</td>'.'<td>'.<span>$row</span>['image'].'</td>'<span>; </span><span>echo</span> '</tr>'<span>; } </span><span>echo</span> '</table>'<span>; </span><span>mysql_close</span>(<span>$conn</span><span>); } </span>?> </div> </body> </html>
先学PHP基础,再去百度查自己需要的功能的原理,然后去实验,实验成功后在网站上使用它。
走完这四步,你才算学会了这门技术的一个功能。
学不会PHP人绝大部分一直在重复第一步 !
w3school上的教程非常的基础,很容易懂,建议先看完它。然后可以看看php100的视频教程,这个讲得很细很易懂,而且讲知识点非常的多,我也是看这个学会的。
还是那句话,看教程只是在背乘法口诀,只会乘法口诀的学生从来都不会做应用题,只有使用它,那才是真正的学习!
最简单的程序就这样:
echo 'Hello, world!';
?>
下载PHP可以在www.php.net下载,选择windows下的二进制代码,可以下载安装包和ZIP包,我喜欢ZIP包,随便解压缩到一个文件夹就可以了,例如c:\php\下。双击上面保存的(我用记事本编辑)PHP文件,选择和你刚才解开的c:\php\php.exe关联就可以了。

PHP在现代编程中仍然是一个强大且广泛使用的工具,尤其在web开发领域。1)PHP易用且与数据库集成无缝,是许多开发者的首选。2)它支持动态内容生成和面向对象编程,适合快速创建和维护网站。3)PHP的性能可以通过缓存和优化数据库查询来提升,其广泛的社区和丰富生态系统使其在当今技术栈中仍具重要地位。

在PHP中,弱引用是通过WeakReference类实现的,不会阻止垃圾回收器回收对象。弱引用适用于缓存系统和事件监听器等场景,需注意其不能保证对象存活,且垃圾回收可能延迟。

\_\_invoke方法允许对象像函数一样被调用。1.定义\_\_invoke方法使对象可被调用。2.使用$obj(...)语法时,PHP会执行\_\_invoke方法。3.适用于日志记录和计算器等场景,提高代码灵活性和可读性。

Fibers在PHP8.1中引入,提升了并发处理能力。1)Fibers是一种轻量级的并发模型,类似于协程。2)它们允许开发者手动控制任务的执行流,适合处理I/O密集型任务。3)使用Fibers可以编写更高效、响应性更强的代码。

PHP社区提供了丰富的资源和支持,帮助开发者成长。1)资源包括官方文档、教程、博客和开源项目如Laravel和Symfony。2)支持可以通过StackOverflow、Reddit和Slack频道获得。3)开发动态可以通过关注RFC了解。4)融入社区可以通过积极参与、贡献代码和学习分享来实现。

PHP和Python各有优势,选择应基于项目需求。1.PHP适合web开发,语法简单,执行效率高。2.Python适用于数据科学和机器学习,语法简洁,库丰富。

PHP不是在消亡,而是在不断适应和进化。1)PHP从1994年起经历多次版本迭代,适应新技术趋势。2)目前广泛应用于电子商务、内容管理系统等领域。3)PHP8引入JIT编译器等功能,提升性能和现代化。4)使用OPcache和遵循PSR-12标准可优化性能和代码质量。

PHP的未来将通过适应新技术趋势和引入创新特性来实现:1)适应云计算、容器化和微服务架构,支持Docker和Kubernetes;2)引入JIT编译器和枚举类型,提升性能和数据处理效率;3)持续优化性能和推广最佳实践。


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