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<?php $var = array('40_'); if (preg_match('/^\d{1,}_$', reset($var), $match)) { var_dump($var); }
Output for 4.3.11 - 7.1.0
Warning: preg_match(): No ending delimiter '/' found in /in/Q2QIB on line 4
Output for 4.3.0 - 4.3.10
Warning: No ending delimiter '/' found in /in/Q2QIB on line 4