Radio button post data of multiple input fields

Question

I have a form in my PHP page which is created by a loop through an array.

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Answer 1

Radio buttons should all use the same name. Only the selected radio button value is submitted:

then:

$size = $_POST['Radiosize'];

There is no need to look at it as an array - it isn't submitted as one. Radio Buttons are not like checkboxes in form processing.