下列常量由此擴展定義，且僅在此擴展編譯入 PHP 或在運行時(shí)動(dòng)態(tài)載入時(shí)可用。
APC_ITER_ALL
(int)
APC_ITER_ATIME
(int)
APC_ITER_CTIME
(int)
APC_ITER_DEVICE
(int)
APC_ITER_DTIME
(int)
APC_ITER_FILENAME
(int)
APC_ITER_INODE
(int)
APC_ITER_KEY
(int)
APC_ITER_MD5
(int)
APC_ITER_MEM_SIZE
(int)
APC_ITER_MTIME
(int)
APC_ITER_NONE
(int)
APC_ITER_NUM_HITS
(int)
APC_ITER_REFCOUNT
(int)
APC_ITER_TTL
(int)
APC_ITER_TYPE
(int)
APC_ITER_VALUE
(int)
APC_LIST_ACTIVE
(int)
APC_LIST_DELETED
(int)