How to detect the normal website service?

A recent project (Php+apache), which requires that the site service be constantly checked for uptime
At present I think of the method is:
1. Detection of Apache HTTPD process
2. Timed Crawl page analysis
The feeling is not very ideal, what kind of method does everybody have??

Reply content:

A recent project (Php+apache), which requires that the site service be constantly checked for uptime
At present I think of the method is:
1. Detection of Apache HTTPD process
2. Timed Crawl page analysis
The feeling is not very ideal, what kind of method does everybody have??

Now that the demand is at the real-time level,

Why not write a socket for the package?

PHP can write, C, py is OK.

such as OP5 http://www.op5.com/.
and Nagios http://www.nagios.org/.
There's a problem with the history chart, and you can send an e-mail.

Write a simple page alone,

Use Curl If the result is excellent to prove that the site is normal, otherwise it is not normal.

Register an account with the surveillance treasure.
Increase operating frequency, such as visiting the home page every minute

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