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<?php $strings = [ "test string (test.url.com) abcdef java.lang.Assertion uvwxyz www.google.com abcdef", "another test string /abc/xyz/lib/def/GH.tr test 200." ]; $strings = array_map(function($x) { preg_match_all('~\bjava(?:\.\w+)+(*SKIP)(*FAIL)|(?<!/)\b\w+(?:\.\w+)+~', $x, $matches); return $matches[0]; }, $strings); print_r($strings);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [0] => test.url.com [1] => www.google.com ) [1] => Array ( ) )

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