Introductie
Shmop is an easy to use set of functions that allows PHP to read,
write, create and delete Unix shared memory segments. Note that versions
of Windows previous to Windows 2000 do not support shared memory. Under
Windows, Shmop will only work when PHP is running in ISAPI mode, 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.
Afhankelijkheden
Deze functies zijn beschikbaar als onderdeel van
de standarad module die altijd beschikbaar is.
Installatie
To use shmop you will need to compile PHP with the
--enable-shmop parameter in your
configure line.
Configuratie tijdens scriptuitvoer
Deze extensie gebruikt geen configuratie regels.
Voorgedefineerde constanten
Deze extensie definieert geen constanten.
Voorbeelden
Voorbeeld 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); ?>
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