how to call R in PHP

While someone around here might know about PHP (I don't h, the fact that you don't know how to call system suggests that you should be asking in a PHP help forum.

Rserve can be used for interactive sessions, but web services usually aren't designed that way, so you probably want to call R with batch arguments the same way you would call it from the command interpreter, but not actually via the command interpreter.
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Hi,
I met tough problems when calling R in PHP. I have tried several ways,
but none of them succeed.??
first of all, I tried Rserve, but I failed to connect to it.
Then, I tried cmd.exe. I get the result when I use"??R CMD BATCH
--vanilla..." in cmd, but I have no idea how to call cmd in php.
I know "system()" is good to call other systems, I triedbut I get no
result in my html page.
if you could provide some suggestion or examples, i would appreciate
your help.

the code in my php is???
$cmd="R CMD BATCH--vanilla --slave delete.r";
$res=system($cmd);

the code in the delete.r file is:
setwd("c://wamp//www//analysis");
x<-4;
y<-3;
z<-x*y;
sink("125.txt");
png(file="125.png");
barplot(z,border="dark blue")
title(main=list("earning of comparison",font=4));
plot(x,z);
dev.off()

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