Closed Source¶
Closed source, also called proprietary software, means that the source code is not publicly available. Only the creator or owning company can view, modify, or distribute the code.
Related : Open Source, Licence, Vendor Lock-in
The definitive reference with all things PHP, and their definitions.
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- count()
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- Crack
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- Cron
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- To Crypt
- Cryptography
- Cross Site Request Forgery (CSRF)
- CSS
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- Ctype
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- Curly Brackets
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- Common Vulnerabilities And Exposures (CVE)
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- Cyclomatic Complexity
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- Database Abstraction Layer (DBA) Extension
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- Domain Design Driven (DDD)
- Distributed Denial Of Service (DDOS)
- Dead Code
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- Debug
- debug_backtrace()
- Debugger
- Declaration
- Declarative Programming
- declare Encoding
- declare()
- Decode
- Decorator Pattern
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- To Decrypt
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- Default Parameter
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- Default
- default_charset
- Defensive Programming
- define()
- defined()
- Definition
- delayedtargetvalidation
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- Dependency
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- Disable Classes
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- Distributed State
- Division
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- Domain Name System (DNS)
- Do While
- Docblock
- Docker Container
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- Document Database
- Documentation
- Dollar /
- Document Object Model (DOM)
- Domain Name
- Domain
- DomainException
- DOMChildNode
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- DOM
- . Directory
- Dot-dot Directory ..
- . File
- Dot Notation
- Double Arrow
- Double Check
- Double Quotes Strings
- Double
- Downtime
- Drop-in
- Don’t Repeat Yourself (DRY)
- Data Structure
- Data Source Name (DSN)
- Data Transfer Object (DTO)
- Duck Typing
- Duplicate
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- Dynamic Constant
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- E
- each
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- .env File
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- Error
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- Escape Character
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- Event Driven
- Event Loop
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- Chaining Exceptions
- Exception Handler
- Exception
- exec
- Execution Path
- Execution Time
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- explode()
- Exponent
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- expose_php
- Expression
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- extends
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- Fallback
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- FastCGI
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- Feature Flag
- Feature Testing
- Feature
- Foreign Function Interface (FFI)
- Fibers
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- File Extension
- File Mode
- File
- file_get_contents()
- file_put_contents()
- File System
- FileSystemIterator
- filter
- Final Class Constants
- Final Keyword
- Finally
- Finite State Machine
- First Class Callable
- Fixture
- Flag
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- Flexibility
- Floating Point Numbers
- Fluent Interface
- fnmatch()
- Folklore
- fopen()
- For
- foreach()
- Form
- Format
- Forum
- Forward Compatible
- Fossilized Methods
- FastCGI Process Manager (FPM)
- Framework
- Free
- Front-end
- File Transfer Protocol (FTP)
- File Transfer Protocol Secure (FTPS)
- Fully Qualified Name
- func_get_args()
- Function Subscripting
- Functions
- Functional Programming
- Functor
- Future
- Fuzzing
- Garbage Collection
- Graphic Draw (GD)
- Generator
- Generics
- get_class()
- get_class_vars()
- get_object_vars()
- Class Getter Method
- gettext Extension
- GIF
- git
- glob()
- Global Code
- Global Space
- Global Variables
- global Scope
- $GLOBALS
- Glue
- GNU Multiple Precision (GMP)
- God Object
- Golf
- Goto
- Gradual Type Checking
- Graph Database
- Graph
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- gRPC (Google Remote Procedure Call)
- Habit
- __halt_compiler()
- Handle
- PHP Handlers
- Hard Coded
- Hardening
- Hash #
- Hash Comparisons
- Cryptographic Hash
- hash() Function
- Hash
- hash_equals()
- Haystack
- Headers
- Headless
- Heredocs
- Heuristics
- Hexadecimal Integer
- Hexagonal Architecture
- hg
- Hidden State
- HMAC
- Hoisting
- Honey Pot
- Horizontal Scaling
- Hosting
- hrtime()
- .htaccess
- HTML Entities
- HTML Entity
- HyperText Markup Language (HTML)
- html_entity_decode
- html_errors
- htmlentities()
- htmlspecialchars
- HTTP Code
- HTTP Encoding
- HTTP Headers
- HTTP Request Headers
- Hyper Text Transfer Protocol (HTTP)
- http_build_query()
- Hyper Text Transfer Protocol Secure (HTTPS)
- Hydratation
- hypot()
- IaaS
- Infrastructure as Code (IaC)
- Iconv
- Integrated Environment of Development (IDE)
- Idempotent
- Identical Operator
- Identification
- Identifier
- Identity Comparison
- Identity
- If Then Else
- Iffectation
- Image
- imagick
- ImagickException
- ImagickPixelException
- Immutable
- Imperative Programming
- implements
- Implicit State
- Implicit
- implode()
- Import
- Impure Function
- in_array()
- include
- include_path
- Inclusions
- Incoming Data
- Inconsistent
- Increment
- Indentation
- Index For Arrays
- Index For SQL
- Index
- Indexed Array
- Inequality
- INF
- Infinite Loop
- Infinite
- InfiniteIterator
- Inflector
- Inheritance
- Inherited Variable
- INI
- ini_set()
- Initialisation
- Injection
- Inlining
- Insecure Deserialization
- instance
- instanceof
- Insteadof
- Instruction
- intdiv()
- integer
- Integration Test
- Interface
- Internals
- Internationalization
- Internet
- Interoperability
- Interpolation
- Interpreted
- Intersection Type
- Internationalization Functions
- Introspection
- InvalidArgumentException
- Type Invariant
- Code Inventory
- Invoke
- Internet Protocol (IP)
- is_a()
- is_object()
- Interface Segregation Principle (ISP)
- Isset
- Iterable
- Iterator
- iterator_to_array()
- IteratorAggregate
- Javascript
- Just In Time (JIT)
- Jobqueue
- JPEG
- JavaScript Object Notation (JSON)
- json_decode()
- json_encode()
- JSON Lines (JSONC)
- JsonException
- JSON Lines (JSONL)
- JsonSerializable
- Jump
- JSON Web Token (JWT)
- Key-value Stores
- Keyword
- KISS
- Goto Labels
- Linux Apache Mysql PHP (LAMP)
- Language Construct
- LSP
- Laravel
- Late Static Binding
- Latency
- Latin1
- Lazy Loading
- Lazy Objects
- Lightweight Directory Access Protocol (LDAP)
- Leading Numeric String
- Leading Zero Means Octal
- Leak
- Legacy
- Linux Nginx Mysql PHP (LEMP)
- LengthException
- Letter Logical Bug
- Lexical Variable
- Library Loading
- Library
- libsodium
- Licence
- Lifecycle
- Last In, First Out (LIFO)
- Line Feed
- Link
- Lint, Won’t Execute
- Linting
- Liskov Substitution Principle (LSP)
- List
- Listener
- Literal Types
- Literal
- Large Language Model (LLM)
- Load Balancer
- Local File Inclusion
- Local Variable
- Local Scope
- Locale
- Lock
- Log File
- Log
- Logarithm
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- LogicException
- Loops
- LSP
- Machine Learning
- Magic Bytes
- Magic Constants
- Magic Hash
- Magic Code
- Magic Methods
- Magic Numbers
- Magic Property
- Magic
- Maintenability
- Maintenance
- Man In The Middle
- Map
- Markdown
- Marketplace
- Match
- Math
- max_execution_time
- Multibyte String
- Model Context Protocol (MCP)
- mcrypt Extension
- Message Digest Algorithm 5 (MD5)
- Memoization
- Memory Leak
- Memory
- memory_limit
- Merge
- Message Bus
- Message Queue
- Method Collision
- Method Compatibility
- Method Overloading
- Method Signature
- Method
- Methodcall
- Metrics
- Micro-optimisation
- Micro-second
- Micro-framework
- Microservice
- microtime()
- Middleware Pattern
- Migration
- Minification
- Minus One -1
- Minus -
- Missing Validation
- Mixed
- Mobile Application
- Mock
- Model
- Module
- Modulo
- Monitoring
- Monolith
- Monomorphization
- Method Resolution Order (MRO)
- Multi-byte
- Multidimensional Array
- Multiplication
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- Multiton
- Mutation Testing
- Model - View - Controller (MVC)
- Minimum Viable Product (MVP)
- MySQL
- mysqli
- mysqli_sql_exception
- N+1 Query Problem
- Name Conventions
- Name
- Named Constructors
- Named Parameters
- Named Type
- Namespace Alias
- Namespace Name
- Namespaces
- Namespaced Name
- Naming Conflict
- Naming
- Not A Number (NAN)
- PHP Natives
- Native
- NativePHP
- Needle
- negative-index
- Nested Attributes
- Nesting
- Network
- Neural Network
- Neutral Element
- Never Type
- New In Initializers
- New Line
- New Without Parenthesis
- new
- NoDiscard
- Non Breakable Spaces
- Non-instantiable
- Non-numeric
- Non-static
- Nonce
- Noop
- @, No Scream Operator
- Nosql Database
- Not Operator
- Notice
- Nowdocs
- Null Byte
- Null
- Nullable
- Null Pattern
- Null Safe Object Operator
- Nullsafe
- Number
- Numeric Base
- Numeric Separator
- Numeric String
- OAuth
- Obfuscation
- Object API
- Object Injection
- Object Invasion
- Object Nullsafe Operator ?->
- Object Operator ->
- Object Persistence
- Object Syntax
- Object Type
- Object
- Oblic Quotes
- Observer Pattern
- Observer Design Pattern
- Open Closed Principle (OCP)
- Octal Integer
- Offensive Programming
- Offset
- On Premise Software
- One Liner
- one
- Onion Architecture
- OOP (Object Oriented Programming)
- Opcache
- Opcode Specialisation
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- Open Source
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- open_basedir
- OpenSSL
- Operand
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- Operator Precedence
- Operators
- Optimisation
- Option
- Optional Parameter
- Oracle
- Order Of Execution
- Object Relational Mapping (ORM)
- One-Time Password (OTP)
- OuterIterator
- Outgoing Data
- OutOfRangeException
- Output buffering
- Over-engineer
- Overflow
- OverflowException
- Overloading
- Override Attribute
- Overriding
- Overwrite
- OWASP
- PaaS
- pack
- Package Manager
- Packagist
- Pagination
- Pair
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- Parameter Removal
- Parameter
- parent
- Parenthesis
- Parquet
- Parse
- parse_str()
- parse_url()
- ParseError
- Parser
- Partial Function
- Pascal Case
- Passphrase
- Password API
- Password
- Path Traversal
- Path
- Pattern Matching
- Pay-as-you-go
- Process Control (pcntl)
- pcntl_signal()
- Perl Compatible Regular Expressions (PCRE)
- PHP Data Objects (PDO)
- PDOException
- Product Requirements Document (PDR)
- PEAR
- PHP Extension C Library (PECL)
- Penetration Test
- Performance
- Permission
- Persistence
- PostgreSQL
- Phar
- PharException
- PHP AI Editor
- PHP Native Attributes
- PHP Constants
- PHP Docker Container
- PHP Editor
- PHP Extensions
- Framework Interoperability Group (FIG)
- php://filter
- PHP Foundation
- PHP Native Function
- PHP Group
- php://input
- PHP Native Interfaces
- PHP Manual
- php://memory
- PHP Native Attribute
- php://output
- PHP RFC
- PHP Runtime
- PHP Tags
- php://tmp
- PHP User Groups
- PHP Variables
- PHP Wrappers
- PHP, Hypertext Preprocessor (PHP)
- php.ini
- PHP_INT_MAX
- PHP_INT_MIN
- PHPdoc
- phpinfo()
- Phptoken
- PHPunit
- PHP Installer For Extensions (PIE)
- Pipe Operator
- Pipe Operator
- Pipeline
- Plain Text
- Plugin
- Plus +
- PNG
- Pointer
- Poisoned Pipeline Execution (PPE)
- Polling
- Polyfill
- Polymorphism
- Pop
- Plain Old PHP Object (POPO)
- Port
- Portability
- Positional Parameters
- Positive Integer
- Post-increment
- Pound #
- Pull Request (PR)
- Pre-increment
- Precedence
- precision
- Predefined Constants
- PHP Predefined Exception
- Prefix
- Preg_match
- preg_split()
- Prepared Query
- Array Prepend
- Preprocessing
- Primitive Obsession
- print_r()
- printf()
- Privacy
- Private Visibility
- Procedural Programming
- Process
- Production
- PHP Profiler
- Program To Interface
- Promise
- Promoted Properties
- Propagation
- Property Hook
- Properties
- Proprietary Source
- Protected Visibility
- Protocol
- Proxy Class
- Proxy
- Pseudo-type
- Pseudo-variable
- PHP Standards Recommendations (PSR)
- Public Visibility
- Pub/Sub
- Pure Function
- Progressive Web App
- Quality of Service (QoS)
- Quality
- Query String
- Query
- Question Mark ?
- Queue
- Quine
- Quoted Printable
- Race Condition
- RACI Model
- Retrieval Augmented Generation (RAG)
- Railroad Programming
- Random
- RandomCryptoSafeEngine
- RandomEngine
- range()
- RangeException
- Rate Limiting
- Role Based Access Control (RBAC)
- Remote Code Execution (RCE)
- Relational DataBase Management System (RDBMS)
- Readability
- Readable
- Reading
- Readline
- Readonly
- Real Time
- Real Numbers
- Recursion
- Recursive Array
- RecursiveArrayIterator
- RecursiveDirectoryIterator
- RecursiveIterator
- RecursiveTreeIterator
- Redirect
- Refactoring
- Reference Count
- References
- Reflection
- ReflectionException
- Reflector
- Regular Expression
- Regexploit
- Register Globals
- register_argc_argv
- Registry
- Relative Name
- Relative Types
- Relative
- Relaxed Comparison
- Relaxed Keywords
- Relaxed Syntax
- Relay Function
- Release
- Reliability
- Render
- Renderer
- Read Eval Print Loop (REPL)
- Reserved Names
- Resource Leak
- resource
- Responsability
- Response
- REST API
- Return Carriage
- Return Type
- Return Value
- Return
- Return Type Will Change
- Reverse Regex
- Revision
- RFC
- Request For Change (RFC)
- Reserved For Future Use (RFU)
- Rich Text
- Rigidity
- robots.txt
- Rollback
- Rounding
- Route
- Remote Procedure Call (RPC)
- RSA
- Rubber Ducking Debugging
- Runtime Checks
- Software-as-a-Service (SAAS)
- Sandbox
- Sanitation
- Server Application Programming Interface (SAPI)
- Static Application Security Testing (SAST)
- Software Bill Of Material (SBOM)
- Static Code Analysis (SCA)
- Scaffolding
- Scalar Types
- Scaling
- Schema
- Scheme
- Scope Resolution Operator ::
- Scope
- Software Development Kit (SDK)
- Software Development Life Cycle (SDLC)
- Search Engine
- Second Order SQL Injection
- Secret
- Security
- SeekableIterator
- Segmentation Fault
- Self-documenting
- Self-reference
- Self
- Semantic Versioning
- Semantics
- Semicolon
- Sensitive Parameter
- Search Engine Optimization (SEO)
- Separation Of Concerns
- Separator
- Sequence
- Serde
- Serializable
- Serialization
- serialize_precision
- Server Architecture
- Server
- Serverless
- Service Container
- Service
- Session Fixation
- Session Hijacking
- Session
- SessionHandlerInterface
- SessionIdInterface
- SessionUpdateTimestampHandlerInterface
- Set
- set_error_handler()
- setlocale
- Class Setter Method
- Secure Hash Algorithm (SHA)
- Shallow Clone
- Shard
- Shared Memory
- Shell Exec
- Shell
- shell_exec()
- Ship
- Short Assignations
- Short Syntax
- Short Tags
- Short Ternary Operator
- Shutdown Function
- Side Effect
- Sign
- Signature
- Silent Behavior
- Simple Switch
- SimpleXML
- Single Quotes Strings
- Single
- Singleton
- sitemap
- Service Level Agreement (SLA)
- Slash /
- sleep
- Slug
- Simple Mail Transfer Protocol (SMTP)
- Snake Case
- Snapshot
- Simple Network Management Protocol (SNMP)
- SNMP3
- Simple Object Access Protocol (SOAP)
- Socket
- SOLID
- Sort
- Source Code
- Single Page Application (SPA)
- Space
- Spaceship Operator
- Special Constant
- Special Types
- Specification
- Spiral
- Standard PHP Library (SPL)
- SplDoublyLinkedList
- SplFileInfo
- SplFileObject
- SplObjectStorage
- SplObserver
- SplStack
- SplStorageObjects
- SplSubject
- sprintf
- SQL Database
- SQL Injection
- Structured Query Language (SQL)
- SQLite3
- sqrt()
- Square Brackets
- Single Responsability Principle (SRP)
- Static Single Assignment Form (SSA)
- sscanf()
- Server Sent Event (SSE)
- Secure Shell (SSH)
- Secure Sockets Layer (SSL)
- Single Sign On (SSO)
- Stack
- Standalone Types
- Standard
- Star *
- State
- Stateful
- Stateless
- Statement
- Static Call
- Static Class
- Static Expression
- Static Method
- Static Property
- Static Variables
- static
- stdclass
- STDOUT
- Stealth Generator
- Storage Systems
- str_contains()
- str_ends_with()
- str_starts_with()
- Stream
- Streamlining
- Strict Comparison
- strict_types
- String Increment
- String Interpolation
- String
- Stringable
- Strpos() Syndrome
- strpos
- strtolower()
- strtoupper()
- Structure
- Stubs Files
- Sub (prefix)
- Subclass
- Subnamespaces
- subtype
- Suffix
- Sunsetting
- Superglobal Variables
- supertype
- Supply Chain Attack
- Supply Chain
- Scalable Vector Graphics (SVG)
- Support Vector Machine (SVM)
- SVMException
- SVN
- Swagger
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- Switch Case
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- Switch
- Symfony
- Synchronous
- Syntax Error
- Syntax
- System Call
- System Event
- System
- Tabulation
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- Tarpit
- Task Runner
- Task
- Total Cost Of Ownership (TCO)
- TCP
- Tech Island
- Tech Silo
- Technical Reference
- Telemetry
- Tempest
- Template
- Temporary Expression
- Ternary Operator
- Test Data Provider
- Test Framework
- Test Pyramid
- Test
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- testdox
- Text
- Thin Method
- Thread
- Three Dots
- throw
- Throwable
- Tick
- ~ Tilde
- Time Travel
- Timing Attack
- Transport Layer Security (TLS)
- Time Of Check To Time Of Use (TOCTOU)
- TODO
- Token
- Tokenizer
- Tom’s Obvious Minimal Language (TOML)
- Tool
- Token Oriented Object Notation (TOON)
- Trace
- Trailing Comma
- Trait
- Transaction
- Transpile
- Traversable
- Traversal
- Tree
- Treemap
- trigger_error()
- trim
- Triple
- Troubleshoot
- True
- Truthy
- Try-catch
- Terminal User Interface (TUI)
- Tutorial
- Type Checking
- Contravariance
- Covariance
- Type Coverage
- Property Type Declaration
- Types Erasure
- Type Inference
- Type Juggling
- Type System
- Typed Constant
- Typed Property
- TypeError
- Type Error
- Typo
- User Datagram Protocol (UDP)
- Unary Operator
- Unbacked Enum
- Undefined
- Underflow
- Underscore
- UnexpectedValueException
- UnhandledMatchError
- Unicode
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- Unit Test
- UnitEnum
- Unpacking
- Unreachable Code
- Unserialization
- unset()
- Unused
- User Operations For Zend (UOPZ)
- Upgrade
- File Upload
- URI Class
- URI Extension
- Universal Resource Identifier (URI)
- Universal Resource Locator (URL)
- Use Alias
- Use In Traits
- Use
- Used
- Useless
- Userland
- UTF-8
- UUencode Encoding
- Universally Unique IDentifier (UUID)
- Validation
- Value Object
- Value
- ValueError
- Var
- var_dump()
- var_export()
- Variable Arguments
- Variable Scope
- Variable Shadowing
- Variable Variables
- Variables
- variable_order
- Variadic
- VCS Commit
- VCS
- Vector Database
- Vendor Lock-in
- Version
- Vertical Scaling
- View In Presentation
- SQL Views
- View
- Virtual Machine (VM)
- Virtual Property
- Visibility
- Visual Debt
- Value Object (VO)
- (void) Cast
- Void
- Vulnerability
- Warning
- Waterfall
- Weak Cryptography
- Weak References
- Weakmap
- Web Application
- Web-spider
- World Wide Web (WWW)
- WebRTC
- Webscraping
- Webserver
- Webshell
- Websocket
- Write Everything Twice (WET)
- WHATWG
- While
- Whitespace
- Wildcard
- Class Wither Method
- Word Combination
- Workflow
- Worktree
- Design Pattern Wrapper
- file://
- ftp://
- http://
- Wrapper Pattern
- php://
- Stream Wrapper
- Wrapper
- Writable
- Writeable
- Writing
- Xdebug
- XML Database
- Extensible Markup Language (XML)
- XMLReader
- XMLwriter
- Cross Site Scripting (XSS)
- XXTEA
- You Are Not Going To Need It (YAGNI)
- YAML Ain’t Markup Language (YAML)
- yield from Keyword
- Yield
- Yoda Condition
- zend.assertions
- Zend Engine
- Zero Cost
- Zero Day Vulnerability
- zero
- zip Extension
- zlib extension
- Zombie Code
- Zval
- Thesaurus
- PHP Dictionary
Related Topics
- Documentation overview
- Index
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