Two arrays in foreach loop

by 
foreach( $codes as $code and $names as $name ) { }

That is not valid.

You probably want something like this…

foreach( $codes as $index => $code ) {
   echo '<option value="' . $code . '">' . $names[$index] . '</option>';
}

Alternatively, it’d be much easier to make the codes the key of your $names array…

$names = array(
   'tn' => 'Tunisia',
   'us' => 'United States',
   ...
);

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