LIX. Miscellaneous functions

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

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 -- Alias of 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
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
iptcparse --  Parse a binary IPTC block into single tags.
leak -- Leak memory
pack -- Pack data into binary string.
show_source -- Syntax highlighting of a file
sleep -- Delay execution
uniqid -- Generate a unique id
unpack -- Unpack data from binary string
usleep -- Delay execution in microseconds