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<?php $regex = '/^(\/\d+)+$/'; $str = '/1/20a/3'; preg_match_all( $regex, $str, $result ); var_dump( $result );
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(2) { [0]=> array(0) { } [1]=> array(0) { } }