search

这句如何理解

本帖最后由 phpcms2021 于 2015-03-27 11:02:54 编辑 //向模板抛出内容

 Tpl::output('brand_list',$brand_list);

主要是参数不理解,brand_list是一组值,还是一个值,我感觉应该是一组,因为如果一个就没有必要这样玩吧,因为是抛向模板

下面是output方法
/**
 * 抛出变量
 *
 * @param mixed $output
 * @param  void
 */
public static function output($output,$input=''){
self::getInstance();

self::$output_value[$output] = $input;
}
/**
 * 实例化
 *
 * @return obj
 */
public static function getInstance(){
if (self::$instance === null || !(self::$instance instanceof Tpl)){
self::$instance = new Tpl();
}
return self::$instance;
}

class Tpl{
/**
 * 单件对象
 */
private static $instance = null;
/**
 * 输出模板内容的数组,其他的变量不允许从程序中直接输出到模板
 */
private static $output_value = array();
/**
 * 模板路径设置
 */
private static $tpl_dir='';
/**
 * 默认layout
 */
private static $layout_file = 'layout';

private function __construct(){}

/**
 * 实例化
 *
 * @return obj
 */
public static function getInstance(){
if (self::$instance === null || !(self::$instance instanceof Tpl)){
self::$instance = new Tpl();
}
return self::$instance;
}

我主要是想明白,上面这些函数通过什么逻辑抛值的,并且是向模板中,看了发晕,逻辑上搞不明白
------解决思路----------------------
Tpl::output('brand_list',$brand_list); 中
'brand_list' 是单值(你不也看到他是用单引号括起的吗?),表示一个数据项。这样在模板中就可用 brand_list 这个名字取到数据

从定义
public static function output($output,$input=''){<br />  self::getInstance();<br />  self::$output_value[$output] = $input;<br />}
也可看到,$output 是作为数组的关联键出现的,显然关联键只能是标量。你不可能用数组(对象)做关联键的

多次执行 Tpl::output 就将多个数据集合置于其中了,注意:同名的关联键将是,后来的覆盖先到的

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
PHP Performance Tuning for High Traffic WebsitesPHP Performance Tuning for High Traffic WebsitesMay 14, 2025 am 12:13 AM

ThesecrettokeepingaPHP-poweredwebsiterunningsmoothlyunderheavyloadinvolvesseveralkeystrategies:1)ImplementopcodecachingwithOPcachetoreducescriptexecutiontime,2)UsedatabasequerycachingwithRedistolessendatabaseload,3)LeverageCDNslikeCloudflareforservin

Dependency Injection in PHP: Code Examples for BeginnersDependency Injection in PHP: Code Examples for BeginnersMay 14, 2025 am 12:08 AM

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.

PHP Performance: is it possible to optimize the application?PHP Performance: is it possible to optimize the application?May 14, 2025 am 12:04 AM

Yes,optimizingaPHPapplicationispossibleandessential.1)ImplementcachingusingAPCutoreducedatabaseload.2)Optimizedatabaseswithindexing,efficientqueries,andconnectionpooling.3)Enhancecodewithbuilt-infunctions,avoidingglobalvariables,andusingopcodecaching

PHP Performance Optimization: The Ultimate GuidePHP Performance Optimization: The Ultimate GuideMay 14, 2025 am 12:02 AM

ThekeystrategiestosignificantlyboostPHPapplicationperformanceare:1)UseopcodecachinglikeOPcachetoreduceexecutiontime,2)Optimizedatabaseinteractionswithpreparedstatementsandproperindexing,3)ConfigurewebserverslikeNginxwithPHP-FPMforbetterperformance,4)

PHP Dependency Injection Container: A Quick StartPHP Dependency Injection Container: A Quick StartMay 13, 2025 am 12:11 AM

APHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.

Dependency Injection vs. Service Locator in PHPDependency Injection vs. Service Locator in PHPMay 13, 2025 am 12:10 AM

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.

PHP performance optimization strategies.PHP performance optimization strategies.May 13, 2025 am 12:06 AM

PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

PHP Email Validation: Ensuring Emails Are Sent CorrectlyPHP Email Validation: Ensuring Emails Are Sent CorrectlyMay 13, 2025 am 12:06 AM

PHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Article

Hot Tools

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools