Shared memory file in PHP

Question

I use openssl_pkcs7_sign and openssl_pkcs7_encrypt to create encrypted data. The functions only accept file names. I would like to store the temporary

Answer 1

Since Windows 2000, the shmop (previously shm_) methods are available.

shmop_open uses a unique integer key to share the memory area. ftok can be used to produce a unique index based on a file path (typically your script file's full path). Any instance that shares the same key can share the same memory.

http://php.net/manual/en/ref.shmop.php

Tested on PHP Version 5.3.3 from Zend Server CE System Windows NT CRYPE 6.1 build 7601 (Unknow Windows version Business Edition Service Pack 1) i586

 'value');
$bytes = shmop_write($memory, serialize($data), 0);
$return = shmop_read($memory, 0, $bytes);
print_r(unserialize($return));
?>

shmop_read/shmop_write stores raw bytes from a string, so you don't need to serialize it, but you will need to write the length of the string somewhere. My example creates a 16KB shared memory area, you can of course size it to fit the openssl file plus the space you need to store the file size.