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PHP Miscellaneous Functions


Introduction to PHP Miscellaneous Functions

We categorize functions that do not belong to other categories into the miscellaneous functions category.


Installation

Miscellaneous functions are part of the PHP core. These functions are available without the need for additional installation.


Runtime Configuration

The behavior of miscellaneous functions is affected by settings in the php.ini file.

Miscellaneous configuration options:

Name Default Description Changeable
ignore_user_abort "0" FALSE indicates that the script will be terminated if it attempts to output after the client disconnects. PHP_INI_ALL
highlight.string "#DD0000" Color used for highlighting syntactically significant strings in PHP. PHP_INI_ALL
highlight.comment "#FF8000" Color used for highlighting PHP comments. PHP_INI_ALL
highlight.keyword "#007700" Color used for syntax highlighting PHP keywords (such as parentheses and semicolons). PHP_INI_ALL
highlight.bg "#FFFFFF" Background color. PHP_INI_ALL
highlight.default "#0000BB" Default color for PHP syntax. PHP_INI_ALL
highlight.html "#000000" Color for HTML code. PHP_INI_ALL
browscap NULL Name and location of the browser capabilities file (e.g., browscap.ini). PHP_INI_SYSTEM

PHP Miscellaneous Functions

PHP: Indicates the earliest PHP version that supports the function.

Function Description PHP
connection_aborted() Checks whether the client disconnected. 3
connection_status() Returns the current connection status. 3
connection_timeout() Deprecated in PHP 4.0.5. Checks if the script timed out. 3
constant() Returns the value of a constant. 4
define() Defines a constant. 3
defined() Checks whether a constant exists. 3
die() Outputs a message and terminates the current script. 3
eval() Evaluates a string as PHP code. 3
exit() Outputs a message and terminates the current script. 3
get_browser() Returns the capabilities of the user's browser. 3
highlight_file() Syntax highlights a file. 4
highlight_string() Syntax highlights a string. 4
ignore_user_abort() Sets whether a remote client disconnection should terminate the script execution. 3
pack() Packs data into a binary string. 3
php_check_syntax() Deprecated in PHP 5.0.5. 5
php_strip_whitespace() Returns the source code of a file with PHP comments and whitespace removed. 5
show_source() Alias of highlight_file(). 4
sleep() Delays code execution for a number of seconds. 3
time_nanosleep() Delay code execution for a number of seconds and nanoseconds. 5
time_sleep_until() Delay code execution until a specified time. 5
uniqid() Generate a unique ID. 3
unpack() Unpack data from a binary string. 3
usleep() Delay code execution for a number of microseconds. 3

PHP Miscellaneous Constants

PHP: Indicates the earliest PHP version that supports the constant.

Constant Description PHP
CONNECTION_ABORTED
CONNECTION_NORMAL
CONNECTION_TIMEOUT
__COMPILER_HALT_OFFSET__ 5
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