# Shared Memory Shmop是一组易于使用的函数，允许PHP读取，写入，创建和删除Unix共享内存段 内置默认关闭需要手动开启 - [预定义常量](https://www.php.net/manual/zh/shmop.constants.php) - [范例](https://www.php.net/manual/zh/shmop.examples.php) - [Basic usage](https://www.php.net/manual/zh/shmop.examples-basic.php) - [Shared Memory 函数](https://www.php.net/manual/zh/ref.shmop.php) - [shmop\_close](https://www.php.net/manual/zh/function.shmop-close.php)— Close shared memory block - [shmop\_delete](https://www.php.net/manual/zh/function.shmop-delete.php)— Delete shared memory block - [shmop\_open](https://www.php.net/manual/zh/function.shmop-open.php)— Create or open shared memory block - [shmop\_read](https://www.php.net/manual/zh/function.shmop-read.php)— Read data from shared memory block - [shmop\_size](https://www.php.net/manual/zh/function.shmop-size.php)— Get size of shared memory block - [shmop\_write](https://www.php.net/manual/zh/function.shmop-write.php)— Write data into shared memory block