Selected is always returned.

Selected is always returned... & lt; selectname = & quot; typeid & quot; & gt; & lt; optionvalue = & quot; 20 & quot; & gt; Name & lt;/span & gt; & lt;/option & gt; & lt; optionval selected will always be returned...
NameName 1

In this way, the drop-down option selects name 1 by default, but once it is changed to name 2, you want to return 20 of the value to fail, and will always be returned to the 22 of selected. what should I do? How can we return the corresponding value based on the change?

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NameName 1

What is the status of this span tag?
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How is it possible? Unless you do not select

PHP code

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Your environment?
Check that the code is submitted, unless your environment is faulty or affected by other code.