php进程数组通过html格式发送

I'm trying to send an array via HTML form:

<input type='text' name='myvar[]' />

How to process it when the form gets submitted? Also, is there any kind of security issues regarding this kind of submission? Thanks

Like array in foreach loop

foreach($_POST['myvar'] as $item)
{
}

$_POST['myvar'] will be an array. No security issues should be worried.