How PHP actually works

shahzada

Dear all PHP buddies!
I am new to PHp.I just statrted reading about PHP.Could anyone tell me that how PHp actually works.I mean how it works from request to response.
As when Jsp page is requested, jsp/servlet engines are involved and then a servlet is actually prepared which then served to user.
What is life cycle of PHP?

Also is PHP portable as we seee java?

thanks...

planetsim

Basically the same as any Dynamic Server langauge
PHP
First is called by from a user from ie a link.
From there the php file is excuted through the server.
After its all executed its sent out as html to the client.
Server Sends php file with html content to client.

PHP Portability.
I guess it really depends on how the script is coded.
A good PHP programmer or any programmer that is somewhat good should be able to produce portable code.

So i guess you can say yes.

shahzada

dear planetsim & other PHPians
thanks for reply..
but i want to know the actual prcoessing...
e.g.
As u know when a user request come for a jsp page ,web server sends it to jsp engine which converts process on it and convert it to java servlet class then servlet engine runs this servlet and makes a response and sends it to user.
Now each time request comes for that jsp page, the compiled servlet class is used to serve user request unless jsp page is changed. and the above cyle runs again.

So sir...is PHP page is compiled every time for every request or it is compiled only once..if it is then to which form it is saved in compiled form..like .class or .obj.

pardon.if i m wrong in some way..
thanks in advance

OhLordy

PHP runs on the zend engine so you could search for Zend at www.php.net or you could check out www.zend.com and see what you can find there. Please post back on what you find because I would be interested to know (I just can't be bothered to look)
Good Luck
Rob