(PHP 5 <= 5.0.5)
fam_cancel_monitor — Terminate monitoring
Terminates monitoring on a resource.
In addition an FAMAcknowledge event occurs.
A resource representing a connection to the FAM service returned by fam_open()
A resource returned by one of the fam_monitor_XXX functions
成功时返回 TRUE, 或者在失败时返回 FALSE.