Shmop is an easy to use set of functions that allows PHP to read,
write, create and delete Unix shared memory segments.
Poznámka:
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).
Poznámka:
In PHP 4.0.3, these functions were prefixed by shm
rather than shmop.
Žiadne externé knižnice nie sú potrebné
na vybudovanie tohto rozšírenia.
To use shmop you will need to compile PHP with the
--enable-shmop parameter in your
configure line.
Toto rozšírenie nemá žiadne konfiguračné direktívy
definované v php.ini.
Toto rozšírenie nemá definované žiadne konštanty.
Príklad 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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