Shmop is an easy to use set of functions that allows PHP to read,
write, create and delete Unix shared memory segments.
Opmerking:
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).
Opmerking:
In PHP 4.0.3, these functions were prefixed by shm
rather than shmop.
Deze functies zijn beschikbaar als onderdeel van
de standaard module die altijd beschikbaar is.
To use shmop you will need to compile PHP with the
--enable-shmop
parameter in your
configure line.
Deze extensie gebruikt geen configuratie regels.
Deze extensie definieert geen constanten.
Voorbeeld 1. Shared Memory Operations Overview
<?php // Create 100 byte shared memory block with system id of 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); ?>
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