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<?php $match = 'word1two2=three()'; if (preg_match('/^(\w+)(?:\|(\w+))?(?:=(\w+\(\)))?$/', $match, $var)) { print_r($var); } else { print('Not matching :('); }
Output for 4.3.0 - 7.1.0
Array ( [0] => word1two2=three() [1] => word1two2 [2] => [3] => three() )