script probs passing arguments into a loop...

Hi, I'm working on Solaris 5.8, and I'm having a problem running a script.

I've got a for loop that runs a command, which i need to pass arguments into that command. I'm having problems with those arguments not passing correctly, altho they are echoing correctly... The output from the command shows that the defaults to the command are being passed only, and not the called arguments that I'm trying to pass via the for loop...

Here's the meat of it:
for loop in "-a 2 -s 3 -x .5" "-a 2 -s 3 -x .75" "-a 3 -s 3 -x .5" " -a 3 -s 3 -x .75"

do
<command> $loop -t 4 -r all
done

****************************
the $loop, "-t 4", and "-r all" are all options I'm basically trying to pass to the command.

It appears that the options part of the do loop are being passed as arguments correctly (the "-t 4" and the "-r all), however the options in the $loop are NOT being passed as arguments correctly.


For now I've tried the various ways to solve this prob:
1) echo the options through a variable

for loop in "-a 2 -s 3 -x .5" "-a 2 -s 3 -x .75" "-a 3 -s 3 -x .5" " -a 3 -s 3 -x .75"

do
$options=`echo $loop`
<command> $options -t 4 -r all
done

2) also tried all different ways to represent the value, in a variable:
$loop
"$loop"
${loop}
"${loop}"


*******************************
Is this possible to be done in bourne shell??
Or is there a different way to pass arguments??? Ugh..

Thanks in advance!
Unseen_Swordsman

Oh yes, I've also tried the following two different ways below. The problem with this method, is that the loop command ends up passing EACH argument to the command, not as a whole string of options, but argument by argument. For example, "-a 2 -s 3 -x .5" becomes: $1="-a", $2="2", etc... When the command executes, it runs each different argument separately, and basically errors out.

Any help appreciated!
Unseen_Swordsman
examples:
#########################
a2s3x5="-a 2 -s 3 -x .5"
a2s3x75="-a 2 -s 3 -x .75"

THRESHOLDS="$a2s3x5 $a2s3x75"

for loop in $THRESHOLDS
do
<command> $loop -t 4 -r all
done

**************


a2s3x5="-a 2 -s 3 -x .5"
a2s3x75="-a 2 -s 3 -x .75"

THRESHOLDS="${a2s3x5} ${a2s3x75}"

for loop in $THRESHOLDS
do
<command> $loop -t 4 -r all
done

is this pseudocode or another language (not PHP)? Why don't you post your php code? I for one cannot make head or tail of this.