The 'verbosity' option in PHP's Memcached extension is used when you want to control the level of logging for a Memcached server. It's particularly useful during debugging and troubleshooting, as it can provide detailed information about operations.
By default, verbosity is turned off. Here's how you can turn it on:
$memcache=newMemcached();$memcache->addServer('localhost',11211);$memcache->setOption(Memcached::OPT_BINARY_PROTOCOL,true);// Set verbosity level$memcache->setOption(Memcached::OPT_VERBOSITY,Memcached::LOG_DEBUG);
In this example, the verbosity level is set to Memcached::LOG_DEBUG, which gives you detailed debugging information.
To turn off verbosity, you simply set the verbosity option back to its default value (Memcached::LOG_NONE):