Web Standards Programmer's Reference: HTML, CSS, JavaScript®, Perl, Python®, and PHP

F.22. Miscellaneous

Function	Returns	Description
get_browser([string browser_name [, bool return_array]])	mixed	Gets information about the capabilities of a browser.
constant(string const_name)	mixed	Given the name of a constant this function returns the constant's associated value.
getenv(string varname)	string	Gets the value of an environment variable.
putenv(string setting)	bool	Sets the value of an environment variable.
getopt(string options [, array longopts])	array	Gets options from the command line argument list.
flush(void)	void	Flushes the output buffer.
sleep(int seconds)	void	Delays for a given number of seconds.
usleep(int micro_seconds)	void	Delays for a given number of micro seconds.
time_nanosleep(long seconds, long nanoseconds)	mixed	Delays for a number of seconds and nanoseconds.
highlight_file(string file_name [, bool return] )	bool	Syntax highlights a source file.
php_strip_whitespace(string file_name)	string	Returns source with stripped comments and whitespace.
php_check_syntax(string file_name [, &$error_message])	bool	Checks the syntax of the specified file.
highlight_string(string string [, bool return] )	bool	Syntax highlights a string or optionally returns it.
uniqid([string prefix , bool more_entropy])	string	Generates a unique ID.
version_compare(string ver1, string ver2 [, string oper])	int	Compares two PHP-standardized version number strings.
connection_aborted(void)	int	Returns true if client disconnected.
connection_status(void)	int	Returns the connection status bitfield. ...