在运行PHP脚本之间传递数据

Question

For multiple running PHP scripts (10 to 100) to communicate, what is the least memory intensive solution?

• Monitor flat files for changes
• Keep running queries on a DB to check for new data

Other techniques I have heard of, but never tried:

• Shared memory (APC, or core functions)
• Message queues (Active MQ and company)

Answer 1

In general, a shared memory based solution is going to be the fastest and have the least overhead in most cases. If you can use it, do it.

Message Queues I don't know much about, but when the choice is between databases and flat files, I would opt for a database because of concurrency issues.

A file you have to lock to add a line to it, possibly causing other scripts to fail to write their messages.

In a database based solution, you can work with one record for each message. The record would contain a unique ID, the recipient, and the message. The recipient script can easily poll for new messages, and after reading, quickly and safely remove the record in question.