In PHP 5.5.14 this function returns NULL (not TRUE or FALSE). I have no information about other PHP releases.(PECL memcache >= 0.2.0)
memcache_debug — Turn debug output on/off
memcache_debug() turns on debug output if parameter
on_off is equal to true and turns off if it's
false.
Note:
memcache_debug() is accessible only if PHP was built with --enable-debug option and always returns
truein this case. Otherwise, this function has no effect and always returnsfalse.
In PHP 5.5.14 this function returns NULL (not TRUE or FALSE). I have no information about other PHP releases.This method is deprecated in at least PHP 5.2.6
memcache_debug() [<a href='function.memcache-debug'>function.memcache-debug</a>]: memcache_debug() is deprecated, please use a debugger (like Eclipse + CDT)