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How many elements does the $matches array contain after the following function call is performed? preg_match('/^(\d{1,2}([a-z]+))(?:\s*)\S+ (?=201[0-9])/', '21st March 2014', $matches);

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How many elements does the $matches array contain after the following function call is performed? preg_match('/^(\d{1,2}([a-z]+))(?:\s*)\S+ (?=201[0-9])/', '21st March 2014', $matches);






 
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