feat: add php solution to lc problem: No.0299 (doocs#966)

Author: Qiu-IT

solution/0200-0299/0299.Bulls and Cows/README.md

@@ -163,6 +163,34 @@ func min(a, b int) int {
 }
 ```
 
+### **PHP**
+
+```php
+class Solution {
+    /**
+     * @param String $secret
+     * @param String $guess
+     * @return String
+     */
+    function getHint($secret, $guess) {
+        $cntA = 0;
+        $cntB = 0;
+        $len = strlen($secret);
+        for ($i = 0; $i < $len; $i++) {
+            if ($secret[$i] == $guess[$i]) $cntA++;
+            else $hashtable[$secret[$i]] += 1;
+        }
+        for ($i = 0; $i < $len; $i++) {
+            if ($secret[$i] != $guess[$i] && $hashtable[$guess[$i]] > 0) {
+                $cntB++;
+                $hashtable[$guess[$i]] -= 1;
+            }
+        }
+        return $cntA."A".$cntB."B";
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0200-0299/0299.Bulls and Cows/README_EN.md

@@ -152,6 +152,34 @@ func min(a, b int) int {
 }
 ```
 
+### **PHP**
+
+```php
+class Solution {
+    /**
+     * @param String $secret
+     * @param String $guess
+     * @return String
+     */
+    function getHint($secret, $guess) {
+        $cntA = 0;
+        $cntB = 0;
+        $len = strlen($secret);
+        for ($i = 0; $i < $len; $i++) {
+            if ($secret[$i] == $guess[$i]) $cntA++;
+            else $hashtable[$secret[$i]] += 1;
+        }
+        for ($i = 0; $i < $len; $i++) {
+            if ($secret[$i] != $guess[$i] && $hashtable[$guess[$i]] > 0) {
+                $cntB++;
+                $hashtable[$guess[$i]] -= 1;
+            }
+        }
+        return $cntA."A".$cntB."B";
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0200-0299/0299.Bulls and Cows/Solution.php

@@ -0,0 +1,23 @@
+class Solution {
+    /**
+     * @param String $secret
+     * @param String $guess
+     * @return String
+     */
+    function getHint($secret, $guess) {
+        $cntA = 0;
+        $cntB = 0;
+        $len = strlen($secret);
+        for ($i = 0; $i < $len; $i++) {
+            if ($secret[$i] == $guess[$i]) $cntA++;
+            else $hashtable[$secret[$i]] += 1;
+        }
+        for ($i = 0; $i < $len; $i++) {
+            if ($secret[$i] != $guess[$i] && $hashtable[$guess[$i]] > 0) {
+                $cntB++;
+                $hashtable[$guess[$i]] -= 1;
+            }
+        }
+        return $cntA."A".$cntB."B";
+    }
+}