<?php $postcodes = array( 'NE', 'NG', 'PE' ); function matches($needle, $postcodes) { foreach ($postcodes as $postcode) { if ($postcode === substr($needle, 0, strlen($postcode))) { return true; } } return false; } foreach (array('NE1', 'RG', 'PE') as $needle) { printf( "%s %s\n", $needle, matches($needle, $postcodes) ? 'matches' : 'does not match' ); } /* NE1 matches RG does not match PE matches */
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