简介

Shmop is an easy to use set of functions that allows PHP to read, write, create and delete Unix shared memory segments.

需求

无需外部库文件就可以加入本扩展模块的支持。

安装

To use shmop you will need to compile PHP with the --enable-shmop parameter in your configure line.

运行时配置

本扩展模块在 php.ini 中未定义任何设置指令。

资源类型

预定义常量

本扩展模块未定义任何常量。

例

例子 1. Shared Memory Operations Overview <?php     // Create 100 byte shared memory block with system id if 0xff3 $shm_id = shmop_open(0xff3, "c", 0644, 100); if (!$shm_id) {     echo "Couldn't create shared memory segment\n"; } // Get shared memory block's size $shm_size = shmop_size($shm_id); echo "SHM Block Size: " . $shm_size . " has been created.\n"; // Lets write a test string into shared memory $shm_bytes_written = shmop_write($shm_id, "my shared memory block", 0); if ($shm_bytes_written != strlen("my shared memory block")) {     echo "Couldn't write the entire length of data\n"; } // Now lets read the string back $my_string = shmop_read($shm_id, 0, $shm_size); if (!$my_string) {     echo "Couldn't read from shared memory block\n"; } echo "The data inside shared memory was: " . $my_string . "\n"; //Now lets delete the block and close the shared memory segment if (!shmop_delete($shm_id)) {     echo "Couldn't mark shared memory block for deletion."; } shmop_close($shm_id);     ?>