A complete collection of PHP resources collected by foreign programmers-PHP Tutorial-php.cn

A collection of PHP resources collected by foreign programmers
ziadoz initiated and maintained a list of PHPresources on Github, including: libraries, frameworks, templates, security, code analysis, logs , third-party libraries, configuration tools, Web Tools, books, e-books, classic blog posts and more. Reprinted from here: http://www.icultivator.com/p/10437.html
Dependency managementDependency and package management library

Composer/Packagist: a package and dependency managers
Composer Installers: a multi-framework Composer library installer
Pickle: a PHP extension installer

Other dependency management Other related dependency management

Satis: a static Composer store Library generator
Composition: a library that checks the Composer environment at runtime
Version: a semantic version parsing and comparison library
NameSpacer - a library that converts underscores to namespaces
Patch Installer - a library that uses Composer to install patches
Composer Checker - A tool to verify Composer configuration

FrameworkWeb development framework

Symfony2 -A framework composed of independent components
Zend Framework 2 -Another framework composed of independent components
Laravel 4 - Another PHP framework
Aura PHP - A framework of independent components
Yii2 - Another PHP framework
Nette - Another framework composed of individual components
PPI Framework 2 - An interoperability framework
Phalcon - Via Framework implemented by C extension

Other frameworksOther web development frameworks

Symfony CMF - Content management framework for creating custom CMS
Knp RAD Bundle - Rapid Application (RAD) package for Symfony 2

Framework componentsIndependent components from web development frameworks

Symfony2 Components -Symfony2 components
Zend Framework 2 Components -ZF2 components
Aura Components -PHP5.4 component package
Hoa Project -Another PHP component Package

Micro Framework Micro Framework and Routing

Silex - Micro framework based on Symfony2 components
Slim - Another simple micro framework
Bullet PHP - Micro framework for building REST APIs
Fast Route - Fast routing library
Pux -Another fast routing library

Other micro-frameworksOther related micro-frameworks and routing

Silex Skeleton -Silex project architecture
Silex Web Profiler -Silex web Debugging toolbar
Stack - Silex/Symfony's stackable middleware library
Slim Skeleton -Slim architecture
Slim View -Slim's custom view collection
Slim Middleware -Slim's custom middleware collection

template Libraries and tools for templating and lexical analysis

Twig - a comprehensive template language
Twig Cache Extension - a template fragment caching library for Twig
Mustache - a PHP implementation of the Mustache template language
Phly Mustache - another PHP implementation of the Mustache template language
MtHaml - A PHP implementation of the HAML template language
PHPTAL - A PHP implementation of the TAL template language
Plates - A native PHP template library
Lex - A lightweight template parser

Static site generator Preprocessing tools to generate the content of web pages.

Sculpin - Tool to convert Markdown and Twig to static HTML
Phrozn - Another tool to convert Textile, Markdown and Twig to HTML

HTTPLibrary for HTTP and website scraping

Guzzle - a comprehensive HTTP client
Buzz - another HTTP client
Requests - a simple HTTP library
HTTPFul - a chained HTTP library
Goutte - a simple web crawler
PHP VCR - A library for recording and replaying HTTP requests

URL A library for parsing URLs

Purl - A URL processing library
PHP Domain Parser - A local prefix parsing library

EmailSend And a library for parsing emails

SwiftMailer - an email solution
PHPMailer - another email solution
Fetch - an IMAP library
Email Reply Parser - an email reply parsing library
Stampie - an email service library, Not as good as SendGrid, PostMark, MailGun and Mandrill.
CssToInlineStyles - A library for inline CSS in email templates

FileFile handling and MIME type detection library

Gaufrette - A file system abstraction layer
Flysystem - Another file system abstraction layer
Canal - A library for detecting Internet media types
Apache MIME Types - A parsing Apache MIME type library
Ferret - a MIME detection library
Hoa Mime - another MIME detection library
Lurker - a resource tracking library
PHP File Locator - a library for locating files in large projects
PHP FFmpeg - a Library for FFmpeg video packaging.
CSV - A CSV data processing library

Streams Streams A library for processing streams

Streamer - An object-oriented stream packaging library

Dependency Injection Dependency Injection Library that implements dependency injection design pattern

Pimple - a small dependency injection container
Auryn - another dependency injection container
Orno Di - another scalable dependency injection container
PHP DI - one that uses Dependency injection implemented by annotations
Acclimate - A common interface for dependency injection containers and service location

Imagery Image A library for processing images

Imagine - An image processing library
PHP Image Workshop - Another image Processing library
Intervention Image - another image processing library
GIF Frame Extractor - a library that extracts GIF animation frame information
GIF Creator - a library that creates GIF animations from multiple images
Image With Text - a library that extracts GIF animation frame information Library for embedding text in
Color Extractor - A library for extracting colors from images

Testing Testing A library for testing code and generating test data

PHPUnit - a unit testing framework
DBUnit - PHPUnit's database testing library
ParaTest - PHPUnit's parallel testing library
PHPSpec - a unit testing library based on function point design
Codeception - a full stack testing framework
AspectMock - PHPUnit/ Codeception Mocking framework.
Atoum - a simple testing library
Mockery - a mock object library for testing
Phake - another mock object library for testing
Prophecy - a highly optional mocking framework
Faker - a Fake data generation library
Samsui - Another fake data generation library
Alice - An expressive generation library
Behat - A behavior-driven development (BDD) testing framework
Pho - A behavior-driven development testing framework
Mink -Web Acceptance Test
HTTP Mock - A library to simulate HTTP requests in unit tests
VFS Stream -A wrapper for virtual file system streams for testing
VFS -Another for testing virtual file systems
Locust -A modern load testing library written in Python

Continuous Integration Continuous IntegrationContinuous integration libraries and applications

Travis CI -A continuous integration platform
PHPCI -An open source continuous integration platform for PHP
Sismo - a continuous testing service library
Jenkins for PHP Supported continuous integration platforms
JoliCi - a Docker-powered continuous integration client written in PHP

Documentation documentation library for generating project documentation

Sami - an API documentation generator
APIGen - Another API document generator
PHP Documentor 2 - An API document generator
phpDox - A document generator for PHP projects (not limited to API documentation)

Security Generate secure random numbers and encrypt data , a library for scanning for vulnerabilities

HTML Purifier - a standards-compliant HTML filter
RandomLib - a library for generating random numbers and strings
True Random - a library for generating random numbers using www.random.org
SecurityMultiTool - a PHP security library
PHPSecLib - a pure PHP secure communication library
TCrypto - a simple key-value encryption repository
PHP IDS - a structured PHP security layer
PHP SSH - an experimental object-oriented SSH wrapper library
IniScan - a library that scans PHP INI files for security
SensioLabs Security Check - a web tool that provides security recommendations for checking Composer dependencies
Zed - an integrated web application penetration testing tool

Passwords Libraries and tools for processing and storing passwords

Password Compat - A compatibility library for new PHP5.5 password functions
phpass - A portable password hashing framework
PHP Password Lib - A generation and validation library Password verification library
Password Policy - A password policy library for PHP and JavaScript
Password Validator - A library for verifying and upgrading password hashes
Zxcvbn PHP - A realistic PHP password strength estimation library based on Zxcvbn JS

Code Analysis A tool for analyzing, parsing and processing code libraries

PHP Parser - a PHP parser written in PHP
PHPPHP - a PHP virtual machine implemented by PHP
PHPSandbox - a PHP sandbox environment
Dissect - a collection of lexical and syntax analysis tools
PHP Mess Detector - A library that scans code for defects, suboptimal code, unused parameters, etc.
PHP Code Sniffer - A library that detects standards conflicts in PHP, CSS and JS code
PHPCPD - A library that detects copied and pasted code
PHP Analyser - A library that analyzes PHP code to find flaws and errors
PHP CS Fixer - A coding standard library
PHP Manipulator - A library to analyze and modify PHP source code
PHP Metrics - A static measurement library
PHP Refactoring Browser - A command line tool set for refactoring PHP code
UBench - A simple A micro-benchmarking library
Athletic - an annotation-based benchmarking library
Mondrian - a code analysis tool using graph theory
Scrutinizer - a web tool for reviewing PHP code
PHPLOC - a quick measure of PHP project size Tools
xHprof - Another PHP profiling tool
PHPCcheckstyle - A tool that helps adhere to specific coding conventions.

Debugging Libraries and tools for debugging code

xDebug - a tool for debugging and analyzing PHP
PHP Debug Bar - a debugging toolbar
PHP Console - a web debugging console
Barbushin PHP Console - Another one using Google Web debugging console for Chrome
PHPDBG - An interactive PHP debugger
Tracy - A simple error detection, logging and time measurement library

Build Tools Project building and automation tools

Go - a simple PHP build tool
Bob - a simple project automation tool
Phake - a PHP clone library
Box - a tool to build PHAR files
Phing - a PHP project inspired by Apache Ant Build system

Task Runners Task Runners Library for automatically running tasks

Task - a pure PHP task runner inspired by Grunt and Gulp
Robo - a PHP task runner with object-oriented configuration
Bldr - A PHP task runner built on Symfony components

Navigation Tools for building navigation structures

KnpMenu - A menu library
Cartographer - A sitemap generation library

Asset Management Resource ManagementTools for managing, compressing and minimizing web site resources

Assetic - a pipeline library for resource management
Pipe - another pipeline library for resource management
Munee - a resource optimization library
JShrink - A JavaScript minimization library
Puli - A library for detecting absolute paths to resources

Geolocation Geolocation A library for geocoding addresses and using latitude and longitude.

GeoCoder - a geocoding library
GeoTools - a library related to geographic tools
PHPGeo - a simple geography library
GeoJSON - an implementation of geographic JSON

Date and Time Date and time Library for handling dates and times

Carbon - A simple date and time API extension
ExpressiveDate - Another date and time API extension
CalendR - A calendar management library

Event events Time-driven or non-blocking Library for event loop implementation

React - an event-driven non-blocking I/O library
Rx.PHP - a reactive extension library
Ratchet - a web socket library
Hoa WebSocket - another web socket Interface library
Hoa EventSource - an event source library
Evenement - an event distribution library
FuelPHP Event - another event distribution library

Logging logLibrary for generating and processing log files

Monolog - a comprehensive logging tool
KLogger - an easy-to-use PSR-3 compliant logging class

E-commerce E-commerce handles payments and builds Libraries and applications for online e-commerce stores

OmniPay - a framework mixed with libraries for multi-gateway payment processing
Payum - a payment abstraction library
Sylius - an open source e-commerce solution
Thelia - another open source E-commerce solution for
Money - A PHP implementation of the Fowler money model
Sebastian Money - Another library for handling monetary values
Swap - An exchange rate library

PDFLibraries and software for handling PDF files

Snappy - a PDF and image generator library
WKHTMLToPDF - a tool to convert HTML to PDF

Database Database A database interaction library using Object Relational Mapping (ORM) or data mapping technology

Doctrine - a comprehensive DBAL and ORM
Doctrine Extensions - a collection of Doctrine behavioral extensions
Propel - a fast ORM, migration library and query builder
Eloquent - Laravel 4 ORM
Baum - an Eloquent embed Set implementation
Spot2 - a MySQL ORM mapper
RedBean - a lightweight, low-configuration ORM
Pomm - a PostgreSQL object model manager
ProxyManager - a toolset for generating proxy objects for data mapping

Migrations MigrationA library that helps manage database schemas and migrations

PHPMig - another migration management library
Phinx - another database migration management library
Migrations - a migration management library
Doctrine Migrations - A Doctrine migration library

NoSQLLibrary for handling NoSQL backends

MongoQB -A MongoDB query building library
Monga -A MongoDB abstraction library
Predis -A fully functional Redis library

Queue queue Library for handling event and task queues

Pheanstalk - a Beanstalkd client library
PHP AMQP - a pure PHP AMQP library
Thumper - a RabbitMQ pattern library
Bernard - a multi-backend abstraction Library

Search Search Libraries and software for indexing and executing queries on data

ElasticSearch PHP - the official client library for ElasticSearch
Elastica - the client library for ElasticSearch
Solarium - the client for Solr Library
SphinxQL query builder - Query library for Sphinx search engine

Command Line command lineLibrary for building command line tools

Boris - A micro PHP REPL
PsySH - Another micro PHP REPL
Pecan - an event-driven and non-blocking kernel
GetOpt - a command line selection parser
OptParse - another command line selection parser
Commando - another simple command line selection parser
GetOptionKit - another Command line selection parser
Cron Expression - A library to calculate cron run dates
ShellWrap - A simple command line wrapper library
Hoa Console - Another command line library
Shunt - One to run in parallel on multiple remote machines Command line library
Cilex - A micro-framework for building command line tools

Authentication Authentication library

Sentry - A hybrid authentication and authorization framework library
Sentry Social - A social network authentication library
Opauth - A multi-channel authentication framework
OAuth2 - An OAuth2 authentication service, resource server and client End library
OAuth2 Server - another OAuth2 server implementation
PHP oAuthLib - another OAuth library
TwitterOAuth - a Twitter OAuth library
TwitterSDK - a fully tested Twitter SDK
Hawk - a Hawk HTTP authentication library
HybridAuth - an open source social login library

Markup tag library for processing tags

Decoda - a lightweight tag parsing library
PHP Markdown - a Markdown parser
CommonMark PHP - a pair CommonMark spec fully supported Markdown parser
Dflydev Markdown - another Markdown parser
Parsedown - another Markdown parser
Ciconia - another Markdown parser that supports Github Markdown style
Cebe Markdown - a fast and extensible Markdown parser
HTML5 PHP - An HTML5 parsing and serialization library

Strings -8 - A portable library for processing UTF-8 strings Hoa String - Another UTF-8 string library Stringy - A string processing library with multi-byte support

UUID - A library for generating UUIDs
Slugify - A library for converting strings to slugs
Urlify - A URLify.jsPHP channel for Django
Text - A text processing library
SQL Formatter - A format for SQL statements Library
UA Parser - A library for parsing user agent strings
Numbers Numbers
A library for processing numbers
Numbers PHP - A library for processing numbers

Math - A library for processing large numbers ByteUnits - Library for parsing, formatting and converting byte units in binary and measurement systems PHP Units of Measure - A library for unit of measure conversion

LibPhoneNumber for PHP - Google Phone PHP implementation library for number processing
Filtering and ValidationFiltering and validation
Library for filtering and validating data
Filterus - A simple PHP filtering library

Respect Validate -A simple validation libraryValitron - Another validation library Upload - a library that handles file upload and validation

MetaYaml - a schema validation library that supports YAML, JSON and XML
ISO-codes - validates various ISOs and ZIP encoding libraries (IBAN, SWIFT/BIC, BBAN, VAT, SSN, UKNIN)
REST and API
Libraries and web tools for developing REST-ful API
Apigility - one using Zend Framework 2 built API builders

Hateoas - a HOATEOAS REST web service library HAL - a Hypertext Application Language (HAL) building library Negotiation - a content negotiation library

Restler - A lightweight framework that exposes PHP methods as a RESTful web API
Caching
A library for caching data
Alternative PHP Cache (APC) - Turns on PHP pseudocode caching

Cache - a caching library (Doctrine part) Stash - another caching library Data structure and storage

A library that implements data structure and storage technology
- Ardent - a data structure library
- PHP Collections - a simple collection library
- Serializer - a library for serializing and deserializing data
- PHP Object Storage - an object storage library
- Fractal - a library for converting complex data Struct to JSON output library
- Totem - A library for managing and structuring data exchange sets
- PINQ - A PHP real-time Linq library
- JsonMapper - A library for mapping embedded JSON structures to PHP classes
Notifications
Library for processing notification software
- Nod - a notification library (Growl, etc.)
- Notificato - a library for processing push notifications
- Notification Pusher - an independent library for device push notifications
- Notificator - a lightweight Level notification library
Deployment deployment
Project deployment library

Pomander - a PHP application deployment tool

Rocketeer - a fast and simple deployer in the PHP world

Envoy - a SSH task running with PHP Tools

Plum - A deployment library

Internationalization and localization Internationalization (I18n) and localization (L10n)
Aura.Intl
Third-party APIAccess third-party API library

Amazon Web Service SDK - PHP AWS SDK official library

S3 Stream Wrapper -Amazon S3 stream packaging library

Stripe -Stripe official PHP library

Campaign Monitor -Campaign Monitor official PHP library

Digital Ocean -Digital Ocean API interface library

Github - Github API interaction library

PHP Github API -Another Github API interaction library

Twitter OAuth -Twitter OAuth workflow interaction library

Twitter REST - Twitter REST API interaction library

Dropbox SDK - The official PHP Dropbox SDK library.

Dropbox SDK - Dropbox SDK official PHP library

Twilio - The official Twilio PHP REST API.

Twilio - Twilio official PHP REST API

Mailgun The official Mailgun PHP API.

Mailgun Mailgun official PHP REST API

Extensions Help the group build a library for PHP extensions

Zephir - a compiled language between PHP and C++ for developing PHP extensions

PHP CPP - a C++ library for developing PHP extensions

Miscellaneous Useful libraries and tools not in the above categories

Spork - a library for handling forking

JSON Lint - a JSON lint tool

JSONPCallbackValidator - a library for validating JSONP callbacks

Pagerfanta - a paging library

Ruler - a simple stateless production environment rule engine.

LiteCQRS - A CQRS (Command Query Responsibility Separation) library

Sslurp - A library that reduces SSL processing

PHP Option An optional type library

Metrics - A simple metrics API library

Sabre VObject - A A library for parsing VCard and iCalendar objects

Annotations - an annotation library (Doctrine part)

Whoops - a good error handling library

Finite - a simple PHP finite state machine

LadyBug - a dumper library

Procrastinator - A library for running time-consuming tasks

Compose - a function composition library

SuperClosure - a library that allows closure serialization

Jumper - a remote service execution library

Underscore - a PHP implementation of the Underscore JS library

PHP PassBook - An iOS PassBook PHP library

PHP Expression - A PHP expression language

RMT - A library for writing versions and publishing software

Wise - A configuration manager

Opengraph - An open gallery

Essence - An extraction web Media library

Embera - an Oembed consumption library

Graphviz - a graphics library

Monad PHP a simple Monad library

Flux - a regular expression construction library

Patchwork - a function library that redefines users

Galapagos - Language conversion evolution

Design Patterns PHP - A design pattern repository implemented in PHP

PHPCR - A PHP implementation of the Java Content Repository (JCR)

Functional PHP - A functional programming library

ClassPreloader - An optimization Auto-loading library

Lib Country - a library of country and region data

Lib Accessor - a library that simplifies access

PHPStack - a TCP/IP stack concept written in PHP

Nmap - an Nmap PHP wrapper

Code Mover - A library for moving code

Iter - A library that provides iteration primitives using generators

Lambda PHP - A Lambda calculation parser in PHP

Country List - All with names and ISO 3166-1 encoding List of countries

PHP-GPIO - Library for GPIO pins of Raspberry PI

print_o - An object graph visualizer

Alias - A class name library

Software Software Software to create a development environment PHP InstallationA tool to help install and manage PHP on your computer

HomeBrew - an OSX package manager

HomeBrew PHP - a HomeBrew PHP channel

PHP OSX - an OSX PHP Installer

PHP Brew - A PHP version manager and installer

PHP Env - Another PHP version manager

PHP Switch - Another PHP version manager

PHP Build - Another PHP version installer

VirtPHP - A tool to create and manage independent PHP environments

Development Environment Development EnvironmentSoftware and tools for creating sandbox development environments

Vagrant - A portable development environment tool

Ansible - A very simple Compilation framework

Puppet - a server automation framework and application

PuPHPet - a web tool for building PHP development virtual machines

Protobox - another web tool for building PHP development virtual machines

Phansible - a web tool for building PHP development virtual machines with Ansible Web tools for the machine

Virtual Machines Virtual Machines Related PHP virtual machines

HipHop PHP - PHP virtual machine, runtime and JIT by Facebook

HippyVM - Another PHP virtual machine

Hack - A HHVM programming language for seamless operation of PHP

IDE integrated development environmentIntegrated development environment that supports PHP

Netbeans - an IDE that supports PHP and HTML5

Eclipse for PHP Developers - an based on PHP for Eclipse platform IDE

PhpStorm - A commercial PHP IDE

Web Applications Web ApplicationsWeb-based applications and tools

3V4L An online PHP shell

DBV - a database version control application

PHP Queue - an application for managing back-end queues

Composer as a Service - a tool for downloading the Composer package as a zip file

MailCatcher - a Web tools for crawling and viewing emails

Resources ResourcesVarious resources to improve your PHP development skills and knowledge, such as books, websites, articlesPHP websitesPHP related useful websites

PHP The Right Way - A quick guide to PHP best practices

PHP Best Practices - A PHP best practice guide

PHP Weekly - A PHP news weekly

PHP Security - A PHP security guide

PHP FIG - PHP Framework Interactive Group

PHP UG - A website that helps users locate the nearest PHP User Group (UG)

Seven PHP - A website where PHP community members are interviewed

Nomad PHP - An online PHP learning resource

PHP Mentoring - Peer-to-peer PHP Tutor Organization

Other Websites Other WebsitesUseful websites related to web development

The Open Web Application Security Project (OWASP) - an open software security community

WebSec IO - a web security community resource

Web Advent - a web developer calendar

Semantic Versioning - a website that parses semantic versions

Atlassian Git Tutorials - a Git tutorial series

Hg Init - A Mercurial tutorial series

Servers for Hackers - A newsletter about server administration

PHP Books Very good PHP related books

Scaling PHP Applications - A book about Steve Corona E-book for extending PHP applications

The Grumpy Programmer's Guide to Building Testable PHP Applications - A book by Chris Hartjes on building PHP application tests

Grumpy PHPUnit - A book by Chris Hartjes on unit testing with PHPUnit

Mastering Object-Orientated PHP - A book on object-oriented PHP by Brandon Savage

Signaling PHP - A book by Cal Evans about capturing PCNTL signals in CLI scripts

Securing PHP: Core Concepts - A book by Chris Cornutt's book on common security terms and practices in PHP

Modernizing Legacy Applications in PHP - A Paul M. Jones book on modernizing legacy PHP applications

Other books Books related to general computing and web development

The Linux Command Line -A book about the Linux command line by William Shotts

Understanding Computation -A book about computing theory by Tom Stuart

The Tangled Web — Securing Web Applications - A book about web application security by Michal Zalewski

Elasticsearch: The Definitive Guide -Clinton A guide to working with Elasticsearch by Cormley and Zachary Tong

Eloquent JavaScript - A book about JavaScript programming by Marijin Haverbeke

Vagrant Cookbook - A book about creating a Vagrant environment by Erika Heidi

Pro Git -Scott Chacon and A book about Git by Ben Straub

PHP VideoVery good PHP related video

Taking PHP Seriously - from Facebook Keith Adams on PHP Advantages

PHP Town Hall - A casual PHP podcast with Ben Edmunds and Phil Sturgeon

Programming with Anthony Anthony Ferrara’s video series

PHP readingPHP related reading materials

Create Your Own PHP Framework - A series of articles by Fabien Potencier on how to create your own PHP framework

Seven Ways to Screw Up BCrypt - An article about correcting BCrypt implementation

Preventing CSRF Attacks -An article about preventing CSRF attacks

Don’t Worry About BREACH - An article about BREACH attacks and CSRF tokens

On PHP 5.3, Lamda Functions and Closures - an article about lambda functions and closures

Use Env - an article about using unix environment help

Composer Primer - Composer Elementary

Composer Versioning - an article about Composer versions Article

Composer Stability Flags - An article about Composer stability flags

Innocent Villagefolk or a Pillagin’ Pirate? - An article about PHP getting ideas from other languages

Predicting Random Numbers in PHP - an article about generating random numbers

A 20 Point List for Preventing XSS in PHP - An article about preventing XSS

PHP Sucks! But I Like It! - An article about the pros and cons of PHP

PHP Is Much Better Than You Think - An article about the PHP language and ecosystem

PHP Internals Reading PHP kernel readingReading PHP kernel or performance-related information

PHP RFCs - PHP RFCs homepage (request comments)

PHP Internals Book - An online book about the PHP kernel written by three core developers

Print vs Echo, Which One is Faster? - An article about printing and echo performance

The PHP Ternary Operator. Fast or Not? -An article about the performance of ternary operations

Disproving the Single Quotes Myth - An article about the performance of single and double quoted strings

You’re Being Lied To - An article about kernel ZVALs

How Long is a Piece of String - an article about the principles of strings

Understanding OpCodes - an article about pseudocode

How Foreach Works -StackOverflow Details about foreach answer

When Does Foreach Copy? -An article about the principle of foreach

How Big Are PHP Arrays (And Values) Really? - An article about the principle of arrays

Why Objects (Usually) Use Less Memory Than Arrays - An article about the principles of objects and arrays

PHP Evaluation Order - An article about PHP evaluation order

PHP source code for developers: 1 2 3 4 - A series about PHP source code

Garbage collection: 1 2 3 Series about PHP garbage collection principles

The above introduces the collection of PHP resources collected by foreign programmers, including relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.