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~

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

TomakePHPapplicationsfaster,followthesesteps:1)UseOpcodeCachinglikeOPcachetostoreprecompiledscriptbytecode.2)MinimizeDatabaseQueriesbyusingquerycachingandefficientindexing.3)LeveragePHP7 Featuresforbettercodeefficiency.4)ImplementCachingStrategiessuc

ToimprovePHPapplicationspeed,followthesesteps:1)EnableopcodecachingwithAPCutoreducescriptexecutiontime.2)ImplementdatabasequerycachingusingPDOtominimizedatabasehits.3)UseHTTP/2tomultiplexrequestsandreduceconnectionoverhead.4)Limitsessionusagebyclosin

Dependency injection (DI) significantly improves the testability of PHP code by explicitly transitive dependencies. 1) DI decoupling classes and specific implementations make testing and maintenance more flexible. 2) Among the three types, the constructor injects explicit expression dependencies to keep the state consistent. 3) Use DI containers to manage complex dependencies to improve code quality and development efficiency.

DatabasequeryoptimizationinPHPinvolvesseveralstrategiestoenhanceperformance.1)Selectonlynecessarycolumnstoreducedatatransfer.2)Useindexingtospeedupdataretrieval.3)Implementquerycachingtostoreresultsoffrequentqueries.4)Utilizepreparedstatementsforeffi


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Linux new version
SublimeText3 Linux latest version

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
