$re = '/(^Test case ([A-Za-z]+)\s+Current Parameters:(?:[^:]+:.*?$)*)+.*?(Test \2 (PASS|FAIL))/ms';
$str = 'Test case AAA
Current Parameters:
Some unique param : 1
Some unique param : 2
Some unique param : 3
Some unique param : 4
*A line of rubbish*
*Another line of rubbish*
*Yet another line of rubbish*
*More and more rubbish*
Test AAA PASS
Test case BBB
Current Parameters:
Some unique param : A
Some unique param : B
Some unique param : C
Some unique param : D
*A line of rubbish*
*Another line of rubbish*
*Yet another line of rubbish*
*More and more rubbish*
Test BBB PASS';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php