LXXXIII. Miscellaneous Functions

Introduction

These functions were placed here because none of the other categories seemed to fit.

Requirements

No external libraries are needed to build this extension.

Installation

There is no installation needed to use these functions; they are part of the PHP core.

Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

Table 1. Misc. Configuration Options

Name	Default	Changeable
ignore_user_abort	"0"	PHP_INI_ALL
highlight.string	"#DD0000"	PHP_INI_ALL
highlight.comment	"#FF8000"	PHP_INI_ALL
highlight.keyword	"#007700"	PHP_INI_ALL
highlight.bg	"#FFFFFF"	PHP_INI_ALL
highlight.default	"#0000BB"	PHP_INI_ALL
highlight.html	"#000000"	PHP_INI_ALL
browscap	NULL	PHP_INI_SYSTEM

For further details and definitions of the PHP_INI_* constants, see the Appendix G.

Here's a short explanation of the configuration directives.

ignore_user_abort boolean

TRUE by default. If changed to FALSE scripts will be terminated as soon as they try to output something after a client has aborted their connection.

Resource Types

This extension has no resource types defined.

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

CONNECTION_ABORTED (integer)
CONNECTION_NORMAL (integer)
CONNECTION_TIMEOUT (integer)
__COMPILER_HALT_OFFSET__ (integer): Added in PHP 5.1.

Table of Contents
connection_aborted -- Returns TRUE if client disconnected
connection_status -- Returns connection status bitfield
connection_timeout -- Return TRUE if script timed out
constant -- Returns the value of a constant
define -- Defines a named constant
defined -- Checks whether a given named constant exists
die -- Equivalent to exit()
eval -- Evaluate a string as PHP code
exit -- Output a message and terminate the current script
get_browser -- Tells what the user's browser is capable of
__halt_compiler -- Halts the compiler execution
highlight_file -- Syntax highlighting of a file
highlight_string -- Syntax highlighting of a string
ignore_user_abort -- Set whether a client disconnect should abort script execution
pack -- Pack data into binary string
php_check_syntax -- Check the PHP syntax of (and execute) the specified file
php_strip_whitespace -- Return source with stripped comments and whitespace
show_source -- Alias of highlight_file()
sleep -- Delay execution
sys_getloadavg -- get average system load
time_nanosleep -- Delay for a number of seconds and nanoseconds
time_sleep_until -- Make the script sleep until the specified time
uniqid -- Generate a unique ID
unpack -- Unpack data from binary string
usleep -- Delay execution in microseconds