XCIX. Shared Memory Functions 简介 Shmop is an easy to use set of functions that allows PHP to read, write, create and delete Unix shared memory segments. 注: Versions of Windows previous to Windows 2000 do not support shared memory. Under Windows, Shmop will only work when PHP is running as a web server module, such as Apache or IIS (CLI and CGI will not work). 注: In PHP 4.0.3, these functions were prefixed by shm rather than shmop. 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 该扩展模块未定义任何设置指令。资源类型预定义常量 该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 shared memory block for deletion."; } shmop_close($shm_id);
?>
目录 shmop_close -- Close shared memory block shmop_delete -- Delete shared memory block shmop_open -- Create or open shared memory block shmop_read -- Read data from shared memory block shmop_size -- Get size of shared memory block shmop_write -- Write data into shared memory block
$GLOBALS<?php
$a = 1;
$b = 2;function Sum()
{
global $a, $b; $b = $a + $b;
}Sum();
echo $b;
?>
而你们所说的global只是同一页面代码可共享,
里面用GLOBALS定义变量,这样就可以实现共享
在shared mem里保存值
后退 前进
XCIX. Shared Memory Functions
简介
Shmop is an easy to use set of functions that allows PHP to read, write, create and delete Unix shared memory segments. 注: Versions of Windows previous to Windows 2000 do not support shared memory. Under Windows, Shmop will only work when PHP is running as a web server module, such as Apache or IIS (CLI and CGI will not work). 注: In PHP 4.0.3, these functions were prefixed by shm rather than shmop. 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
该扩展模块未定义任何设置指令。资源类型预定义常量
该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 shared memory block for deletion.";
}
shmop_close($shm_id);
?>
目录
shmop_close -- Close shared memory block
shmop_delete -- Delete shared memory block
shmop_open -- Create or open shared memory block
shmop_read -- Read data from shared memory block
shmop_size -- Get size of shared memory block
shmop_write -- Write data into shared memory block
后退 起点 前进
session_write_close 上一级 shmop_close
function _awme_function_application_serialize()
{
global $_APP;
$filename = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'awme_file_application_class_static_file';
$file = fopen($filename, 'w') or die('why?');
fwrite($file, serialize($_APP));
fclose($file);
}function _awme_function_application_unserialize()
{
$filename = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'awme_file_application_class_static_file'; return file_exists($filename) ? unserialize(file_get_contents($filename)) : array();
}register_shutdown_function('_awme_function_application_serialize');
$_APP = _awme_function_application_unserialize();
//+++++++++++++++++++++++++++++++++$_APP这个全局数组内的变量可持续。
eg.
$_APP['count']++;//计数功能