For quick and dirty, it seems like 'cat' is a very reasonable way to do this.... unless you are interested in controlling the child process .... or .....you want to make the code portable to other OS's which might not have 'cat'....like a M$ windows PC.... ( which is available from Cygwin).
POST or GET does not matter unless you are over filling the GET capacity.<br>
Provided you are not overflowing get (more than 256 I think),..... <br>
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Use different values for the 'name' elements in the input tags. <br>
One button has name="blue"......<br>
Second button has...
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