// Also, increasing the range above the condition statements // increases efficiency. That's almost 20% of the numbers // between 0 and 100 that get to end early. function number_suffix($number){ // Validate and translate our input if ( is_numeric($number)){ // Get the last two digits (only once) $n = $number % 100; } else { // If the last two characters are numbers if ( preg_match( '/[0-9]?[0-9]$/', $number, $matches )){ // Return the last one or two digits $n = array_pop($matches); } else { // Return the string, we can add a suffix to it return $number; } } // Skip the switch for as many numbers as possible. if ( $n > 3 && $n < 21 ) return $number . 'th'; // Determine the suffix for numbers ending in 1, 2 or 3, otherwise add a 'th' switch ( $n % 10 ){ case '1': return $number . 'st'; case '2': return $number . 'nd'; case '3': return $number . 'rd'; default: return $number . 'th'; } } //Example: print number_suffix(3); //returns: 3rd print number_suffix(51); //returns: 51st print number_suffix(94859); //returns: 94859th