feat: add php solution to lc problem: No.0303 (doocs#916)

No.0303.Range Sum Query - Immutable

Author: Qiu-IT

solution/0300-0399/0303.Range Sum Query - Immutable/README.md

@@ -316,6 +316,30 @@ void numArrayFree(NumArray *obj) {
 */
 ```
 
+### **PHP**
+
+```php
+class NumArray {
+    /**
+     * @param Integer[] $nums
+     */
+    function __construct($nums) {
+        $this->sum = [0];
+        for ($i = 0; $i < count($nums); $i++) {
+            array_push($this->sum, $this->sum[$i] + $nums[$i]);
+        }
+    }
+    /**
+     * @param Integer $left
+     * @param Integer $right
+     * @return Integer
+     */
+    function sumRange($left, $right) {
+        return $this->sum[$right + 1] - $this->sum[$left];
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0300-0399/0303.Range Sum Query - Immutable/README_EN.md

@@ -300,6 +300,30 @@ void numArrayFree(NumArray *obj) {
 */
 ```
 
+### **PHP**
+
+```php
+class NumArray {
+    /**
+     * @param Integer[] $nums
+     */
+    function __construct($nums) {
+        $this->sum = [0];
+        for ($i = 0; $i < count($nums); $i++) {
+            array_push($this->sum, $this->sum[$i] + $nums[$i]);
+        }
+    }
+    /**
+     * @param Integer $left
+     * @param Integer $right
+     * @return Integer
+     */
+    function sumRange($left, $right) {
+        return $this->sum[$right + 1] - $this->sum[$left];
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0300-0399/0303.Range Sum Query - Immutable/Solution.php

@@ -0,0 +1,19 @@
+class NumArray {
+    /**
+     * @param Integer[] $nums
+     */
+    function __construct($nums) {
+        $this->sum = [0];
+        for ($i = 0; $i < count($nums); $i++) {
+            array_push($this->sum, $this->sum[$i] + $nums[$i]);
+        }
+    }
+    /**
+     * @param Integer $left
+     * @param Integer $right
+     * @return Integer
+     */
+    function sumRange($left, $right) {
+        return $this->sum[$right + 1] - $this->sum[$left];
+    }
+}