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<?php $match = preg_replace_callback(array('/\d/', '/a/'), function($matches)use(&$result){ $result[] = $matches; return '_'; }, 'ada2d1', 1); print_r($match); print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
_da_d1Array ( [0] => Array ( [0] => 2 ) [1] => Array ( [0] => a ) )

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