Other solutions to exercises

exercises/MaxChar/Complete/MaxCharComplete.php

@@ -51,4 +51,13 @@ public static function get1(string $string): string
 
         return (string) $max;
     }
+
+    public static function get2(string $string): string
+    {
+        $chars = str_split($string);
+        $count = array_count_values($chars);
+        arsort($count);
+
+        return (string) key($count);
+    }
 }

exercises/Palindrome/Complete/PalindromeComplete.php

@@ -65,4 +65,9 @@ public static function check3(string $string): bool
 
         return false;
     }
+
+    public static function check4(string $string): bool
+    {
+        return strrev($string) === $string;
+    }
 }

tests/MaxChar/Complete/MaxCharCompleteTest.php

@@ -47,4 +47,19 @@ public function testGet1MaxCharWithNumbers(): void
     {
         self::assertSame('2', MaxCharComplete::get1('apple 2202'));
     }
+
+    public function testGet2SingleMaxChar(): void
+    {
+        self::assertSame('a', MaxCharComplete::get2('a'));
+    }
+
+    public function testGet2MaxChar(): void
+    {
+        self::assertSame('q', MaxCharComplete::get2('qqweqrty'));
+    }
+
+    public function testGet2MaxCharWithNumbers(): void
+    {
+        self::assertSame('2', MaxCharComplete::get2('apple 2202'));
+    }
 }

tests/Palindrome/Complete/PalindromeCompleteTest.php

@@ -148,4 +148,39 @@ public function testDeifiedIsAPalindrome3(): void
     {
         self::assertTrue(PalindromeComplete::check3('deified'));
     }
+
+    public function testFafIsPalindrome4(): void
+    {
+        self::assertTrue(PalindromeComplete::check4('faf'));
+    }
+
+    public function testFafSpaceIsNotAPalindrome4(): void
+    {
+        self::assertFalse(PalindromeComplete::check4('faf '));
+    }
+
+    public function testSpaceFafIsNotAPalindrome4(): void
+    {
+        self::assertFalse(PalindromeComplete::check4(' faf'));
+    }
+
+    public function testHelloIsNotAPalindrome4(): void
+    {
+        self::assertFalse(PalindromeComplete::check4('hello'));
+    }
+
+    public function test11211IsAPalindrome4(): void
+    {
+        self::assertTrue(PalindromeComplete::check4('11211'));
+    }
+
+    public function testDogSpaceGodIsNotAPalindrome4(): void
+    {
+        self::assertFalse(PalindromeComplete::check4('Dog god'));
+    }
+
+    public function testDeifiedIsAPalindrome4(): void
+    {
+        self::assertTrue(PalindromeComplete::check4('deified'));
+    }
 }