简单的利用php谢了一个分页的功能模块
先贴张图看看效果
在贴一下代码吧
<span style="color: #000000;">php </span><span style="color: #800080;">$localhost</span> = "localhost"<span style="color: #000000;">; </span><span style="color: #800080;">$username</span> = "root"<span style="color: #000000;">; </span><span style="color: #800080;">$password</span> = "root"<span style="color: #000000;">; </span><span style="color: #800080;">$db</span> = "test"; <span style="color: #008000;">//</span><span style="color: #008000;">信息</span> <span style="color: #800080;">$pagesize</span> = 5<span style="color: #000000;">; </span><span style="color: #800080;">$conn</span> = <span style="color: #008080;">mysql_connect</span>(<span style="color: #800080;">$localhost</span>,<span style="color: #800080;">$username</span>,<span style="color: #800080;">$password</span>); <span style="color: #008000;">//</span><span style="color: #008000;">链接数据库</span> <span style="color: #0000ff;">if</span>(!<span style="color: #800080;">$conn</span><span style="color: #000000;">){ </span><span style="color: #0000ff;">echo</span> "数据库链接失败".<span style="color: #008080;">mysql_error</span><span style="color: #000000;">(); } </span><span style="color: #008080;">mysql_query</span>("SET NAMES 'UTF8'"); <span style="color: #008000;">//</span><span style="color: #008000;">编码转化</span> <span style="color: #800080;">$db_select</span> = <span style="color: #008080;">mysql_select_db</span>(<span style="color: #800080;">$db</span>); <span style="color: #008000;">//</span><span style="color: #008000;">选择表 //查询记录总数</span> <span style="color: #800080;">$total_sql</span> = "select COUNT(*) from page"<span style="color: #000000;">; </span><span style="color: #800080;">$total_result</span> = <span style="color: #008080;">mysql_query</span>(<span style="color: #800080;">$total_sql</span><span style="color: #000000;">); </span><span style="color: #800080;">$total_row_arr</span> = <span style="color: #008080;">mysql_fetch_row</span>(<span style="color: #800080;">$total_result</span><span style="color: #000000;">); </span><span style="color: #800080;">$total_row</span> = <span style="color: #800080;">$total_row_arr</span>[0]; <span style="color: #008000;">//</span><span style="color: #008000;">总条数 //总页数</span> <span style="color: #800080;">$total</span> = <span style="color: #008080;">ceil</span>(<span style="color: #800080;">$total_row</span> / <span style="color: #800080;">$pagesize</span><span style="color: #000000;">); </span><span style="color: #008000;">//</span><span style="color: #008000;">当前页数</span> <span style="color: #800080;">$page</span> = @<span style="color: #800080;">$_GET</span>['p'] ? <span style="color: #800080;">$_GET</span>['p'] : 1<span style="color: #000000;">; </span><span style="color: #008000;">//</span><span style="color: #008000;">limit 下限</span> <span style="color: #800080;">$offset</span> = (<span style="color: #800080;">$page</span> - 1)*<span style="color: #800080;">$pagesize</span><span style="color: #000000;">; </span><span style="color: #800080;">$sql</span> = "select * from page order by id limit {<span style="color: #800080;">$offset</span>},{<span style="color: #800080;">$pagesize</span>}"<span style="color: #000000;">; </span><span style="color: #800080;">$result</span> = <span style="color: #008080;">mysql_query</span>(<span style="color: #800080;">$sql</span><span style="color: #000000;">); </span><span style="color: #0000ff;">echo</span> "<p>PHP分页代码的小模块</p>"<span style="color: #000000;">; </span><span style="color: #0000ff;">echo</span> "
ID | NAME |
".$id." | ".$name." |
上一页 丨下一页
"; mysql_free_result($result); mysql_close($conn);?>关键点: 1、$sql = "select * from page order by id limit {$offset},{$pagesize}";
这两点是关键能体现 分页技术 和php 代码艺术的地方~
和大家一起学习吧~

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你应该关心DependencyInjection(DI),因为它能让你的代码更清晰、更易维护。1)DI通过解耦类,使其更模块化,2)提高了测试的便捷性和代码的灵活性,3)使用DI容器可以管理复杂的依赖关系,但要注意性能影响和循环依赖问题,4)最佳实践是依赖于抽象接口,实现松散耦合。

是的,优化papplicationispossibleandessential.1)empartcachingingcachingusedapcutorediucedsatabaseload.2)优化的atabaseswithexing,高效Quereteries,and ConconnectionPooling.3)EnhanceCodeWithBuilt-unctions,避免使用,避免使用ingglobalalairaiables,并避免使用

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选择DependencyInjection(DI)用于大型应用,ServiceLocator适合小型项目或原型。1)DI通过构造函数注入依赖,提高代码的测试性和模块化。2)ServiceLocator通过中心注册获取服务,方便但可能导致代码耦合度增加。

phpapplicationscanbeoptimizedForsPeedAndeffificeby:1)启用cacheInphp.ini,2)使用preparedStatatementSwithPdoforDatabasequesies,3)3)替换loopswitharray_filtaray_filteraray_maparray_mapfordataprocrocessing,4)conformentnginxasaseproxy,5)

phpemailvalidation invoLvesthreesteps:1)格式化进行regulareXpressecthemailFormat; 2)dnsvalidationtoshethedomainhasavalidmxrecord; 3)


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