


PHP introductory training tutorial What technologies should PHP programmers master?
There is always a group of people who are eager to find a job after half-studied. They can't answer the interview questions and can't brag, so you can only pay a low salary. What technologies should PHP programmers master? So let’s summarize the Band of Brothers PHP training
.
Please refer to before the interview: (80% completed in the first three stages, monthly salary 5k+ in Beijing)
The first stage: (PHP+MySQL core programming) Object-oriented programming
MySQL database,
Optimization details of MySQL.
HTTP protocol, http is also the cornerstone of our web development. It is very helpful for us to understand the underlying mechanism of PHP, so that we can understand what is happening and why.
Database programming (mysql mysqli pdo),
MySQL extension library, MySQLI extension library and PDO method.
MVC development model, using MVC applications are divided into three core components: model, view, controller. They each handle their own tasks.
Cookie and session, Session and Cookie are the most important user behavior tracking technologies, especially widely used in e-commerce and SNS projects.
PHP drawing technology, proficient in using PHP drawing functions to complete project requirements.
Second Stage: (PHP Advanced)
PHP XML programming uses dom/xpath/simpeXML to operate XML files. Currently, many websites use xml as configuration files to reduce the coupling of the program.
Smarty template technology, use smarty technology to complete View components in MVC development, and gain an in-depth understanding of the essence of the MVC pattern.
Javascript
Ajax
JQuery
MVC framework, TP or other
Linux (LAMP), configuration.
SVN version control,
Large portal website optimization core technology, page staticization, Memcached caching technology, MySql database in-depth optimization.
The third phase: (secondary development technology)
E-commerce system (based on shopex or based on ecshop)
CMS content management system (based on DEDECMS secondary development), Dreamweaver content management system (DedeCms) is based on PHP+MySQL technical architecture.
The fourth stage: (High-end, impact 10K)
Mongodb database, flexibly use MongoDB for CRUD operations in actual projects, and use MongoDB to optimize the project, and have a preliminary understanding of the advanced features of MongoDB.
Full-text indexing engine Sphinx uses Sphinx to achieve high-speed indexing, high-speed search and high availability. They can provide more professional search functions than the database itself, making it easier for applications to implement professional full-text retrieval, and can flexibly use Sphinx to optimize projects.
Mysql database read-write separation technology, correctly install and configure the Mysql master-slave server and achieve replication. In the case of high concurrency, massive storage and heavy load on the website, use Mysql read-write separation flexibly to optimize the website.
Email technology, able to use PHP's Email function and PHPMailer class to send emails, correctly build and configure your own email server to complete sending and receiving, have some understanding of STMP and POP3 protocols, and be able to complete actual needs in email development.
PHP online payment technology. Currently, many large e-commerce websites have applied online payment technology, such as Lashou.com, Taobao.com, Dangdang.com, etc.
Nginx and server cluster technology, Nginx is a very high-performance web and reverse proxy server. It has many very superior features: in the case of high connection concurrency, it can support responses of up to 50,000 concurrent connections. It can also support external services as an HTTP proxy server. Nginx is also a very good mail proxy server.

ThebestapproachforsendingemailsinPHPisusingthePHPMailerlibraryduetoitsreliability,featurerichness,andeaseofuse.PHPMailersupportsSMTP,providesdetailederrorhandling,allowssendingHTMLandplaintextemails,supportsattachments,andenhancessecurity.Foroptimalu

The reason for using Dependency Injection (DI) is that it promotes loose coupling, testability, and maintainability of the code. 1) Use constructor to inject dependencies, 2) Avoid using service locators, 3) Use dependency injection containers to manage dependencies, 4) Improve testability through injecting dependencies, 5) Avoid over-injection dependencies, 6) Consider the impact of DI on performance.

PHPperformancetuningiscrucialbecauseitenhancesspeedandefficiency,whicharevitalforwebapplications.1)CachingwithAPCureducesdatabaseloadandimprovesresponsetimes.2)Optimizingdatabasequeriesbyselectingnecessarycolumnsandusingindexingspeedsupdataretrieval.

ThebestpracticesforsendingemailssecurelyinPHPinclude:1)UsingsecureconfigurationswithSMTPandSTARTTLSencryption,2)Validatingandsanitizinginputstopreventinjectionattacks,3)EncryptingsensitivedatawithinemailsusingOpenSSL,4)Properlyhandlingemailheaderstoa

TooptimizePHPapplicationsforperformance,usecaching,databaseoptimization,opcodecaching,andserverconfiguration.1)ImplementcachingwithAPCutoreducedatafetchtimes.2)Optimizedatabasesbyindexing,balancingreadandwriteoperations.3)EnableOPcachetoavoidrecompil

DependencyinjectioninPHPisadesignpatternthatenhancesflexibility,testability,andmaintainabilitybyprovidingexternaldependenciestoclasses.Itallowsforloosecoupling,easiertestingthroughmocking,andmodulardesign,butrequirescarefulstructuringtoavoidover-inje

PHP performance optimization can be achieved through the following steps: 1) use require_once or include_once on the top of the script to reduce the number of file loads; 2) use preprocessing statements and batch processing to reduce the number of database queries; 3) configure OPcache for opcode cache; 4) enable and configure PHP-FPM optimization process management; 5) use CDN to distribute static resources; 6) use Xdebug or Blackfire for code performance analysis; 7) select efficient data structures such as arrays; 8) write modular code for optimization execution.

OpcodecachingsignificantlyimprovesPHPperformancebycachingcompiledcode,reducingserverloadandresponsetimes.1)ItstorescompiledPHPcodeinmemory,bypassingparsingandcompiling.2)UseOPcachebysettingparametersinphp.ini,likememoryconsumptionandscriptlimits.3)Ad


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