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<?php $hits = []; preg_match_all("/(?<=\s)\w/", " this is a string ", $hits, PREG_PATTERN_ORDER | PREG_OFFSET_CAPTURE); $result = array_column ( $hits[0], 1 ); $s_result = join ( ", ", $result); echo $s_result;
Output for rfc.property-hooks, git.master, git.master_jit
2, 11, 16, 20

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