Extract name from input inside of string in smarty - html

Question

I was wondering if there is a possibility to extract attributes from a string in Smarty.
Sample:
{$mySmartyArray}
//This array contains
//Array( 0 => "<input name='aaa' />",
// 1 => "<input value='' name='bbb' placeholder='' />",
// 2 => "<input placeholder='foobar' name='ccc' />"
// );
What I want to achieve is something like:
<select name="{$mySmartyArray[0]:attr[name]}">
Of course, I know this looks kind of crap, but I'm looking for some kind of selector.
Or am I supposed to do this with a dirty strpos search ?
Or is a regular expression a possibility?
The task is:
PHP calls some functions and creates the smarty stuff. Now I want to replace the inputs in the array with some select-options.
I'm about to create a smarty plugin to do something like:
<select name="{preg_match value=$mySmartyArray[0] pattern='myRegExHere'}">
<option>...</option>
</select>
Which brings me to my next question: What would be the regex for selecting this?

Answer 1

I added a Plugin to solve my problem:
function smarty_function_preg_match($params, &$smarty)
{
if (!empty($params['pattern']) && !empty($params['subject'])) {
$subject = $params['subject'];
$pattern = "~{$params['pattern']}~";
preg_match($pattern, $subject, $match);
return $match[1];
}
}
The usage is now
{preg_match pattern='name="(.*?)"' subject=$new_item_data.content}
In my case, this returns the name value:
<select name="{preg_match pattern='name="(.*?)"' subject=$new_item_data.content}">
<option>aaa</option>
<option>bbb</option>
</select>