(PECL apc >= 3.1.4)
apc_bin_dump — Get a binary dump of the given files and user variables
string apc_bin_dump ([ array $files = NULL [, array $user_vars = NULL ]] )
Returns a binary dump of the given files and user variables from the APC cache. A NULL
for files or user_vars signals a dump of every entry, whereas array() will dump nothing.
Returns a binary dump of the given files and user variables from the APC cache, FALSE
if APC is not enabled, or NULL
if an unknown error is encountered.
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https://secure.php.net/manual/en/function.apc-bin-dump.php