shmop_open

(PHP 4 >= 4.0.4, PHP 5)

shmop_open -- Create or open shared memory block

Description

int shmop_open ( int key, string flags, int mode, int size)

shmop_open() can create or open a shared memory block.

shmop_open() takes 4 parameters: key, which is the system's id for the shared memory block, this parameter can be passed as a decimal or hex. The second parameter are the flags that you can use:

The third parameter is the mode, which are the permissions that you wish to assign to your memory segment, those are the same as permission for a file. Permissions need to be passed in octal form ex. 0644. The last parameter is size of the shared memory block you wish to create in bytes.

Note: Note: the 3rd and 4th should be entered as 0 if you are opening an existing memory segment. On success shmop_open() will return an id that you can use to access the shared memory segment you've created.

Example 1. Create a new shared memory block

<?php
$shm_key
= ftok(__FILE__, 't');
$shm_id = shmop_open($shm_key, "c", 0644, 100);
?>

This example opened a shared memory block with a system id returned by ftok().


Sites of interest: Web Hosting : Reseller Hosting : Website Hosting : HTML Editor : Web Design Templates : Free Web Hosting : ASP code examples : PHP & MySQL Code Examples
  Copyright 2004 Evrsoft Developer Network. Privacy policy - Link to Us

Contact Evrsoft