PHP 关于Memory函数

void shmop_close ( int

$shmid

)
— Close shared memory block

bool shmop_delete ( int

$shmid

)
— Delete shared memory block
成功时返回

TRUE

， 或者在失败时返回

FALSE

。

int shmop_open ( int

$key

, string

$flags

, int

$mode

, int

$size

)
— Create or open shared memory block
key -System's id for the shared memory block
flag - a c w n
mode -The permissions that you wish to assign to your memory segment
size -The size of the shared memory block you wish to create in bytes

On success shmop_open() will return an id that you can use to access the shared memory segment you've created.

FALSE

is returned on failure.

string shmop_read ( int

$shmid

, int

$start

, int

$count

)
— Read data from shared memory block
Returns the data 或者在失败时返回

FALSE

.

int shmop_size ( int

$shmid

)
— Get size of shared memory block
Returns an int, which represents the number of bytes the shared memory block occupies.

int shmop_write ( int

$shmid

, string

$data

, int

$offset

)
— Write data into shared memory block

int memory_get_usage ([ bool

$real_usage

= false ] )
—返回当前分配给你的 PHP 脚本的内存量，单位是字节（byte）。

int memory_get_peak_usage ([ bool

$real_usage

= false ] )
返回分配给你的 PHP 脚本的内存峰值字节数。如果设置为

TRUE

可以获取从系统分配到的真实内存尺寸。 如果未设置，或者设置为

FALSE

，仅会报告 emalloc() 使用的内存。