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<?php $domains = array( 'http://wwwvagrant.royalmail.com/business', 'http://wwwvagrant.parcelforce.com', 'https://www2.postoffice.co.uk', 'http://wwwvagrant.royalmail.com', 'asdfasdfasdf', 'http://eibvagrant.royalmail.com', 'http://wwwvagrant.royalmail.com/payments', ); $doamins = array_filter($domains, function($domain) { return filter_var($domain, FILTER_VALIDATE_URL) !== FALSE; }); print_r($domains); var_dump( filter_var('dsd', FILTER_VALIDATE_UR));