:shower: fewer function calls for numeric and alphanum table checks

src/Data/AlphaNum.php

@@ -14,7 +14,7 @@ namespace chillerlan\QRCode\Data;
 
 use chillerlan\QRCode\QRCode;
 
-use function array_search, ord, sprintf;
+use function ord, sprintf;
 
 /**
  * Alphanumeric mode: 0 to 9, A to Z, space, $ % * + - . / :
@@ -44,13 +44,12 @@ final class AlphaNum extends QRDataAbstract{
 	 * @throws \chillerlan\QRCode\Data\QRCodeDataException
 	 */
 	protected function getCharCode(string $chr):int{
-		$i = array_search($chr, $this::CHAR_MAP_ALPHANUM);
 
-		if($i !== false){
-			return $i;
+		if(!isset($this::CHAR_MAP_ALPHANUM[$chr])){
+			throw new QRCodeDataException(sprintf('illegal char: "%s" [%d]', $chr, ord($chr)));
 		}
 
-		throw new QRCodeDataException(sprintf('illegal char: "%s" [%d]', $chr, ord($chr)));
+		return $this::CHAR_MAP_ALPHANUM[$chr];
 	}
 
 }

src/Data/Number.php

@@ -59,7 +59,7 @@ final class Number extends QRDataAbstract{
 		for($i = 0; $i < $len; $i++){
 			$c = ord($string[$i]);
 
-			if(!in_array($string[$i], $this::CHAR_MAP_NUMBER, true)){
+			if(!isset($this::CHAR_MAP_NUMBER[$string[$i]])){
 				throw new QRCodeDataException(sprintf('illegal char: "%s" [%d]', $string[$i], $c));
 			}
 

src/Data/QRDataInterface.php

@@ -17,18 +17,20 @@ namespace chillerlan\QRCode\Data;
  */
 interface QRDataInterface{
 
-	const CHAR_MAP_NUMBER = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
+	const CHAR_MAP_NUMBER = [
+		'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4, '5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
+	];
 
 	/**
 	 * ISO/IEC 18004:2000 Table 5
 	 */
 	const CHAR_MAP_ALPHANUM = [
-		'0', '1', '2', '3', '4', '5', '6', '7',
-		'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
-		'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
-		'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
-		'W', 'X', 'Y', 'Z', ' ', '$', '%', '*',
-		'+', '-', '.', '/', ':',
+		'0' =>  0, '1' =>  1, '2' =>  2, '3' =>  3, '4' =>  4, '5' =>  5, '6' =>  6, '7' =>  7,
+		'8' =>  8, '9' =>  9, 'A' => 10, 'B' => 11, 'C' => 12, 'D' => 13, 'E' => 14, 'F' => 15,
+		'G' => 16, 'H' => 17, 'I' => 18, 'J' => 19, 'K' => 20, 'L' => 21, 'M' => 22, 'N' => 23,
+		'O' => 24, 'P' => 25, 'Q' => 26, 'R' => 27, 'S' => 28, 'T' => 29, 'U' => 30, 'V' => 31,
+		'W' => 32, 'X' => 33, 'Y' => 34, 'Z' => 35, ' ' => 36, '$' => 37, '%' => 38, '*' => 39,
+		'+' => 40, '-' => 41, '.' => 42, '/' => 43, ':' => 44,
 	];
 
 	/**

src/QRCode.php

@@ -246,7 +246,7 @@ class QRCode{
 		$len = strlen($string);
 
 		for($i = 0; $i < $len; $i++){
-			if(!in_array($string[$i], $charmap, true)){
+			if(!isset($charmap[$string[$i]])){
 				return false;
 			}
 		}