how php displays the output?

[peter]

Hello,

If I have a PhP code below in a linux+apache environment,

=============== ===============
<?php>
the first php block code
<?>

The HTML code goes here

<?php>
the second php block code
<?>

=============== =============

does php open a temporary file to store the output from
"the first php block code"?
then combined with "The HTML code goes here" and then the output from
"the second php block code"? Then display the output of this temporary
file to web client and remove this temporary file afterwards?

Thanks,

Peter

[CountScubula]

"peter" <on********@yah oo.com> wrote in message
news:gY******** ******@newssvr2 9.news.prodigy. com...

Hello,

If I have a PhP code below in a linux+apache environment,

=============== ===============
<?php>
the first php block code
<?>

The HTML code goes here

<?php>
the second php block code
<?>

=============== =============

does php open a temporary file to store the output from
"the first php block code"?
then combined with "The HTML code goes here" and then the output from
"the second php block code"? Then display the output of this temporary
file to web client and remove this temporary file afterwards?

Thanks,

Peter

sort of.

first it is <?php code ?> not <?php> code <?>

php reads in the entire file, glanses over it (parse) includes any files (
require() ) that need to be apart of it,
the it starts a top down aproach,

if output buffering is on, the output goes into memory, if its not, then it
goes to screen if full or flush() command is executed

--
Mike Bradley
http://www.gzentools.com -- free online php tools

[peter]

CountScubula wrote:

"peter" <on********@yah oo.com> wrote in message
news:gY******** ******@newssvr2 9.news.prodigy. com...

Hello,

If I have a PhP code below in a linux+apache environment,

============= =============== ==
<?php>
the first php block code
<?>

The HTML code goes here

<?php>
the second php block code
<?>

============= ===============

does php open a temporary file to store the output from
"the first php block code"?
then combined with "The HTML code goes here" and then the output from
"the second php block code"? Then display the output of this temporary
file to web client and remove this temporary file afterwards?

Thanks,

Peter

sort of.

first it is <?php code ?> not <?php> code <?>

php reads in the entire file, glanses over it (parse) includes any files (
require() ) that need to be apart of it,
the it starts a top down aproach,

if output buffering is on, the output goes into memory, if its not, then it
goes to screen if full or flush() command is executed

Thanks. Mike.
What I am concerned is about its performance if every request for php
code will open/close a file and delete it afterwords.

What you mean "output goes to screen" is to send out directly to the
client, right? If the output goes into memory, the performance should
be good. I am not sure how big memory should php allocate in advance to
hold the output internaly.

Thanks,

Peter


--
Mike Bradley
http://www.gzentools.com -- free online php tools

[CountScubula]

"peter" <on********@yah oo.com> wrote in message
news:4q******** ******@newssvr2 9.news.prodigy. com...

Thanks. Mike.
Youe welcome
What I am concerned is about its performance if every request for php
code will open/close a file and delete it afterwords.

What you mean "output goes to screen" is to send out directly to the
client, right? If the output goes into memory, the performance should
be good.
In this example yes, generaly it goes to std output, and when run with a web
server, yes to the browser.
with std output, you can pipe stuff in and out if a php script if you need
to.

I am not sure how big memory should php allocate in advance to hold the output internaly.

Thanks,
Peter

The default setting should suffice, only modify if it becomes a problem.
Now if you have intensive php scripts with data manipulation, then
lots-o-ram is good with a fast cpu.

some of my scripts have been so intensive, they can bring down a 1 GHz singe
cpu with 512KB ram.
I have a proccess/backup data sever that is on a quad 2.4 GHz machine with 2
GB Ram, its my powerhouse. It actualy remotely grabs data from other servers
and backs up into zip files, for a span of the last 30 days, and has all my
data center monitoring on it, from room temp to stats on the switches (far
beyond MRTG)
--
Mike Bradley
http://www.gzentools.com -- free online php tools

[Andy Hassall]

On Tue, 06 Jan 2004 21:41:33 GMT, peter <on********@yah oo.com> wrote:

does php open a temporary file to store the output from
"the first php block code"?
then combined with "The HTML code goes here" and then the output from
"the second php block code"? Then display the output of this temporary
file to web client and remove this temporary file afterwards?

No, it doesn't use any temporary files.

--
Andy Hassall (an**@andyh.co. uk) icq(5747695) (http://www.andyh.co.uk)
Space: disk usage analysis tool (http://www.andyhsoftware.co.uk/space)

[peter]

Andy Hassall wrote:

On Tue, 06 Jan 2004 21:41:33 GMT, peter <on********@yah oo.com> wrote:

does php open a temporary file to store the output from
"the first php block code"?
then combined with "The HTML code goes here" and then the output from
"the second php block code"? Then display the output of this temporary
file to web client and remove this temporary file afterwards?

No, it doesn't use any temporary files.

thanks for your information. I think using temporary file will hurt
performance. Do you have some ideas how it is handled?

thanks.

Peter

[peter]

CountScubula wrote:

"peter" <on********@yah oo.com> wrote in message
news:4q******** ******@newssvr2 9.news.prodigy. com...

Thanks. Mike.

Youe welcome

What I am concerned is about its performance if every request for php
code will open/close a file and delete it afterwords.

What you mean "output goes to screen" is to send out directly to the
client, right? If the output goes into memory, the performance should
be good.

In this example yes, generaly it goes to std output, and when run with a web
server, yes to the browser.
with std output, you can pipe stuff in and out if a php script if you need
to.

I am not sure how big memory should php allocate in advance to

hold the output internaly.

Thanks,
Peter

The default setting should suffice, only modify if it becomes a problem.

Not sure what is the default settings for memory size to hold the output
from a php script. What if the default memory size settings cannot hold
the output? allocate another segment of memory with the default size? or
increase the default memory size?

I assume mod_php handles the similar way as mod_perl, thus, both
scripting languages has similar performance.


Now if you have intensive php scripts with data manipulation, then
lots-o-ram is good with a fast cpu.
That is true. Thanks,

Peter

some of my scripts have been so intensive, they can bring down a 1 GHz singe
cpu with 512KB ram.
I have a proccess/backup data sever that is on a quad 2.4 GHz machine with 2
GB Ram, its my powerhouse. It actualy remotely grabs data from other servers
and backs up into zip files, for a span of the last 30 days, and has all my
data center monitoring on it, from room temp to stats on the switches (far
beyond MRTG)
--
Mike Bradley
http://www.gzentools.com -- free online php tools

[Pedro Graca]

peter wrote:

thanks for your information. I think using temporary file will hurt
performance. Do you have some ideas how it is handled?

Assume there is no caching anywhere (not on php, not on the webserver,
not on proxies, not on the client browser)

<?php
// headers have already been sent to the client browser
// it's now 23:44:55.376544
echo 'a'; // the 'a' is sent to the client on 23:44:55.376591
sleep(10);
?>
<br/> <!-- this line is sent to the client on 23:45:05.377052 -->
<?php
sleep(10);
echo 'z'; // the 'z' is sent to the client on 23:45:15.377107 :)
?>
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