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PHP 8.1.31 Released!
Getting Started
Introduction
A simple tutorial
Language Reference
Basic syntax
Types
Variables
Constants
Expressions
Operators
Control Structures
Functions
Classes and Objects
Namespaces
Enumerations
Errors
Exceptions
Fibers
Generators
Attributes
References Explained
Predefined Variables
Predefined Exceptions
Predefined Interfaces and Classes
Predefined Attributes
Context options and parameters
Supported Protocols and Wrappers
Security
Introduction
General considerations
Installed as CGI binary
Installed as an Apache module
Session Security
Filesystem Security
Database Security
Error Reporting
User Submitted Data
Hiding PHP
Keeping Current
Features
HTTP authentication with PHP
Cookies
Sessions
Handling file uploads
Using remote files
Connection handling
Persistent Database Connections
Command line usage
Garbage Collection
DTrace Dynamic Tracing
Function Reference
Affecting PHP's Behaviour
Audio Formats Manipulation
Authentication Services
Command Line Specific Extensions
Compression and Archive Extensions
Cryptography Extensions
Database Extensions
Date and Time Related Extensions
File System Related Extensions
Human Language and Character Encoding Support
Image Processing and Generation
Mail Related Extensions
Mathematical Extensions
Non-Text MIME Output
Process Control Extensions
Other Basic Extensions
Other Services
Search Engine Extensions
Server Specific Extensions
Session Extensions
Text Processing
Variable and Type Related Extensions
Web Services
Windows Only Extensions
XML Manipulation
GUI Extensions
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Manual de PHP
Referencia de funciones
Extensiones relacionadas con variable y tipo
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Filtrado de datos
Introducción
Instalación/Configuración
Requerimientos
Instalación
Configuración en tiempo de ejecución
Tipos de recursos
Tipos de filtros
Filtros de validación
Filtros de saneamiento
Otros filtros
Opciones de filtrado
Constantes predefinidas
Ejemplos
Validación
Saneamiento
Funciones de Filter
filter_has_var
— Comprueba si existe una variable de un tipo concreto existe
filter_id
— Indica el ID del nombre de filtro que se indique
filter_input
— Toma una variable externa concreta por su nombre y opcionalmente la filtra
filter_input_array
— Obtiene variables externas y opcionalmente las filtra
filter_list
— Devuelve una lista de todos los filtros soportados
filter_var
— Filtra una variable con el filtro que se indique
filter_var_array
— Retorna múltiple variables y opcionalmente las filtra
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