feat: add php solution to lc problem: No.1523 (#902)

No.1523.Count Odd Numbers in an Interval Range

Author: Qiu-IT

solution/1500-1599/1523.Count Odd Numbers in an Interval Range/README.md

@@ -107,6 +107,21 @@ int countOdds(int low, int high) {
 }
 ```
 
+### **PHP**
+
+```php
+class Solution {
+    /**
+     * @param Integer $low
+     * @param Integer $high
+     * @return Integer
+     */
+    function countOdds($low, $high) {
+        return (($high + 1) >> 1) - ($low >> 1);
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1500-1599/1523.Count Odd Numbers in an Interval Range/README_EN.md

@@ -105,6 +105,21 @@ int countOdds(int low, int high) {
 }
 ```
 
+### **PHP**
+
+```php
+class Solution {
+    /**
+     * @param Integer $low
+     * @param Integer $high
+     * @return Integer
+     */
+    function countOdds($low, $high) {
+        return (($high + 1) >> 1) - ($low >> 1);
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1500-1599/1523.Count Odd Numbers in an Interval Range/Solution.php

@@ -0,0 +1,11 @@
+class Solution {
+
+    /**
+     * @param Integer $low
+     * @param Integer $high
+     * @return Integer
+     */
+    function countOdds($low, $high) {
+        return (($high + 1) >> 1) - ($low >> 1);
+    }
+}