<?php
$pattern = '~^(?<id>\d+)\s+name1qaz\s+(?=.*?name2asd\b)~mi';
$subject = '1 name1qaz avenue (name2qwe region) 
2 name1wsx road (name2asd region) 
3 name1edc street (name2zxc region) 
4 name1qaz square (name2asd place) 
5 name1wsx avenue (name2qwe region) 
7 name1edc street (name2zxc place) 
8 name1qaz road (name2zxc region) 
9 name1wsx square (name2asd region)';
if(preg_match( $pattern, $subject , $matches ))
   print_r($matches);
?>

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