对于php,个人感觉能够熟练操作数组和字符串,基本上已经是入门了,php本身有很多操作数组和字符串的函数,今天在做一个功能时,需要用Js动态的创建门店信息,这些信息是要从后台添加的,想来想去,通过php读取数据库,得到数组,然后将数组转化成符合需求js数组,
php数组形式为:
$newArray = array(array('地区'=>'北京地区','items'=>'10','detail'=>array(0=>array('店名'=>'旗舰店','url'=>'http://www.'),1=>array('店名'=>'jjjj','url'=>'http://www.fdd'))),
array('地区'=>'上海地区','items'=>'11','detail'=>array(0=>array('店名'=>'旗舰店','url'=>'http://www.'),1=>array('店名'=>'jjjj','url'=>'http://www.fdd'))),
);
这里用的一个很方便的函数:json_encode();
var jsarray = new Array();
jsarray = ;
用console.log();可以看到jsarray的结构。
在这里如何构造这样一个符合要求的php数组呢?(我用的是phpcms系统)
$sql= 'select catid,catname,items from category where parentid=10';
$result = mysql_query($sql);
while ($row = mysql_fetch_array($result)) {
$arrArea['地区'] = $row['catname'];
$arrArea['items'] = $row['items'];
unset($arrArea['detail']);//这一步很关键,要不得出的信息就会累加。
$sql2 = 'select title,url from news where catid='.$row['catid'];
$fendian = mysql_query($sql2);
while ($re=mysql_fetch_assoc($fendian)) {
$item['店名']=$re['title'];
$item['url']=$re['url'];
$arrArea['detail'][] = $item;
}
$newwarr[]=$arrArea;
}
var_dump($newwarr);
json_encode:对变量进行 JSON 编码,该函数只能接受 UTF-8编码的数据 .
相对应的还有json_decode,第二个参数为true,返回数组,执行相逆的过程。
json只能用对象和数组。

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


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 English version
Recommended: Win version, supports code prompts!

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

Zend Studio 13.0.1
Powerful PHP integrated development environment

Notepad++7.3.1
Easy-to-use and free code editor
