PHP 7.0.6 Released
Getting Started
Introduction
A simple tutorial
Language Reference
Basic syntax
Types
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Constants
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Functions
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Errors
Exceptions
Generators
References Explained
Predefined Variables
Predefined Exceptions
Predefined Interfaces and Classes
Context options and parameters
Supported Protocols and Wrappers
Security
Introduction
General considerations
Installed as CGI binary
Installed as an Apache module
Filesystem Security
Database Security
Error Reporting
Using Register Globals
User Submitted Data
Magic Quotes
Hiding PHP
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Features
HTTP authentication with PHP
Cookies
Sessions
Dealing with XForms
Handling file uploads
Using remote files
Connection handling
Persistent Database Connections
Safe Mode
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
Credit Card Processing
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
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Session Extensions
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Variable and Type Related Extensions
Web Services
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XML Manipulation
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PHP Manual
Function Reference
Variable and Type Related Extensions
Variable handling
Introduction
Installing/Configuring
Requirements
Installation
Runtime Configuration
Resource Types
Predefined Constants
Variable handling Functions
boolval
— Get the boolean value of a variable
debug_zval_dump
— Dumps a string representation of an internal zend value to output
doubleval
— Alias of floatval
empty
— Determine whether a variable is empty
floatval
— Get float value of a variable
get_defined_vars
— Returns an array of all defined variables
get_resource_type
— Returns the resource type
gettype
— Get the type of a variable
import_request_variables
— Import GET/POST/Cookie variables into the global scope
intval
— Get the integer value of a variable
is_array
— Finds whether a variable is an array
is_bool
— Finds out whether a variable is a boolean
is_callable
— Verify that the contents of a variable can be called as a function
is_double
— Alias of is_float
is_float
— Finds whether the type of a variable is float
is_int
— Find whether the type of a variable is integer
is_integer
— Alias of is_int
is_long
— Alias of is_int
is_null
— Finds whether a variable is NULL
is_numeric
— Finds whether a variable is a number or a numeric string
is_object
— Finds whether a variable is an object
is_real
— Alias of is_float
is_resource
— Finds whether a variable is a resource
is_scalar
— Finds whether a variable is a scalar
is_string
— Find whether the type of a variable is string
isset
— Determine if a variable is set and is not NULL
print_r
— Prints human-readable information about a variable
serialize
— Generates a storable representation of a value
settype
— Set the type of a variable
strval
— Get string value of a variable
unserialize
— Creates a PHP value from a stored representation
unset
— Unset a given variable
var_dump
— Dumps information about a variable
var_export
— Outputs or returns a parsable string representation of a variable
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