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<?php function splitname($input) { $input = trim($input); if ( strlen($input) < 1 ) return array( 0 => null, 1 => null ); $input = explode(' ', $input); if ( count($input) < 2 ) return array( 0 => $input[0], 1 => null ); $lastname = end($input); unset($input[count($input) - 1]); $firstname = implode(' ', $input); return array( 0 => $firstname, 1 => $lastname ); } echo var_dump(splitname('')); ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(2) { [0]=> NULL [1]=> NULL }

preferences:
258.72 ms | 405 KiB | 396 Q