Improve implementation

src/Base32/Base32.php

@@ -108,14 +108,18 @@ public function decode(string $encoded, bool $strict = false): string
                 throw new RuntimeException('The encoded data length is invalid.');
             }
 
-            $encoded .= str_repeat($padding, $remainder);
+            for ($i = 0; $i < $remainder; $i++) {
+                $encoded .= $padding;
+            }
         }
 
         $inside = rtrim($encoded, $padding);
         $end = substr($encoded, strlen($inside));
-        $endLength = strlen($end);
-        if ($strict && 0 !== $endLength && 1 !== $endLength && 3 !== $endLength && 4 !== $endLength && 6 !== $endLength) {
-            throw new RuntimeException('The encoded data ends with an invalid padding sequence length.');
+        if ($strict) {
+            $endLength = strlen($end);
+            if (0 !== $endLength && 1 !== $endLength && 3 !== $endLength && 4 !== $endLength && 6 !== $endLength) {
+                throw new RuntimeException('The encoded data ends with an invalid padding sequence length.');
+            }
         }
 
         if (false !== strpos($inside, $padding)) {
@@ -127,10 +131,11 @@ public function decode(string $encoded, bool $strict = false): string
         }
 
         $chars = [];
-        foreach (str_split($alphabet) as $offset => $char) {
-            $chars[$char] = $offset;
+        for ($i = 0; $i < self::ALPHABET_SIZE; $i++) {
+            $chars[$alphabet[$i]] = $i;
         }
         $chars[$padding] = 0;
+
         $offset = 0;
         $bitLen = 5;
         $length = strlen($encoded);