Arithmetic statement as Array Index

[Anon]

I was wondering if its possible to use the result of a simple arithmetic equation as the index into an array
e.g
//Load Array
$Arr[]="Tom";
$Arr[]="Sarah";
$Arr[]="Paul";
$Arr[]="John";
//Display Array
for ($i=0;$i<=4;$i++)
{
//Is it possible to do the following
print "Arr[1] is related to Arr[$i+2]";

/* I want it to display Sarah is related to John but I get an error saying missing "[ " in the print line. As far as I can remember its possible to do the above in C++
}

[Anon]

it should work; could the problem be missing dollars?

print "Arr[1] is related to Arr[$i+2]"; >> print "$Arr[1] is related to $Arr[$i+2]";

i'd be inclined to cat them into the string, too..

print $Arr[1]." is related to ".Arr[$i+2];

--
rad

[Anon]

I may have typed my example incorrectly
but the error I get is not related to missing dollar signs.
I get an error msg about missing square brackets .The work around I used was to do the arithmetic before the array access and then reassign the index variable I used if I needed to access the array again
heres a very basic e.g
//Start
$i=1+2;
$Arr[]="Tom";
$Arr[]="Sarah";
$Arr[]="Paul";
$Arr[]="Sam";

print" $Arr[2] is related to $Arr[$i]";
//results in Paul is related to Sam
Do you think the concatenate op would work better?
Thanks for the help

[Anon]

Yes.
In string,s PHP does not allow you to use a var in the brackets of an array.

this works fine:

print" $Arr[2] is related to ".$Arr[$i]."\n";