PHP array post data

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Form: $headerValues=array();\[code\]$headerValues[1][2]="Test";... ....echo "<input type=\"hidden\" name=\"ArrayData\" value=http://stackoverflow.com/"$headerValues\"/>";echo "<input type=\"submit\" name=\"submit\" value=http://stackoverflow.com/"Submit\" />"; \[/code\]How do I read headerValues on FORM POST , I see as ARRAY when I use this code\[code\]foreach (array_keys($_POST) as $key) { $$key = $_POST[$key]; print "$key is ${$key}<br />"; print_r(${$key}); } \[/code\]