feat: add php solution to lc problem: No.0219 (#1054)

Author: Qiu-IT

solution/0200-0299/0219.Contains Duplicate II/README.md

@@ -155,6 +155,32 @@ function containsNearbyDuplicate(nums: number[], k: number): boolean {
 }
 ```
 
+### **PHP**
+
+```php
+class Solution {
+    /**
+     * @param Integer[] $nums
+     * @param Integer $k
+     * @return Boolean
+     */
+    function containsNearbyDuplicate($nums, $k) {
+        $hashtable = [];
+        for ($i = 0; $i < count($nums); $i++) {
+            $tmp = $nums[$i];
+            if (
+                array_key_exists($tmp, $hashtable) &&
+                $k >= $i - $hashtable[$tmp]
+            ) {
+                return true;
+            }
+            $hashtable[$tmp] = $i;
+        }
+        return false;
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0200-0299/0219.Contains Duplicate II/README_EN.md

@@ -146,6 +146,32 @@ function containsNearbyDuplicate(nums: number[], k: number): boolean {
 }
 ```
 
+### **PHP**
+
+```php
+class Solution {
+    /**
+     * @param Integer[] $nums
+     * @param Integer $k
+     * @return Boolean
+     */
+    function containsNearbyDuplicate($nums, $k) {
+        $hashtable = [];
+        for ($i = 0; $i < count($nums); $i++) {
+            $tmp = $nums[$i];
+            if (
+                array_key_exists($tmp, $hashtable) &&
+                $k >= $i - $hashtable[$tmp]
+            ) {
+                return true;
+            }
+            $hashtable[$tmp] = $i;
+        }
+        return false;
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0200-0299/0219.Contains Duplicate II/Solution.php

@@ -0,0 +1,21 @@
+class Solution {
+    /**
+     * @param Integer[] $nums
+     * @param Integer $k
+     * @return Boolean
+     */
+    function containsNearbyDuplicate($nums, $k) {
+        $hashtable = [];
+        for ($i = 0; $i < count($nums); $i++) {
+            $tmp = $nums[$i];
+            if (
+                array_key_exists($tmp, $hashtable) &&
+                $k >= $i - $hashtable[$tmp]
+            ) {
+                return true;
+            }
+            $hashtable[$tmp] = $i;
+        }
+        return false;
+    }
+}