Downloads
Documentation
Get Involved
Help
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
Dealing with XForms
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
Keyboard Shortcuts
?
This help
j
Next menu item
k
Previous menu item
g p
Previous man page
g n
Next man page
G
Scroll to bottom
g g
Scroll to top
g h
Goto homepage
g s
Goto search
(current page)
/
Focus search box
PHP Function List
print_r/function.is-null.php
doesn't exist. Closest matches:
runkit7_function_copy
runkit7_function_redefine
create_function
runkit7_function_rename
runkit7_function_add
uopz_function
register_tick_function
rnp_version_string_full
runkit7_function_remove
function_exists
pg_field_is_null
get_defined_functions
phpdbg_break_function
pg_transaction_status
uopz_add_function
register_shutdown_function
uopz_del_function
spl_autoload_functions
scoutapm_list_instrumented_functions
reflectionfunction
pg_client_encoding
inet_ntop
readline_completion_function
fann_set_train_stop_function
fann_get_train_stop_function
reflectionenum
sqlsrv_begin_transaction
badfunctioncallexception
fann_set_train_error_function
fann_get_train_error_function
