diff --git a/solution/1500-1599/1523.Count Odd Numbers in an Interval Range/README.md b/solution/1500-1599/1523.Count Odd Numbers in an Interval Range/README.md
index 30219785da256..dab12767031df 100644
--- a/solution/1500-1599/1523.Count Odd Numbers in an Interval Range/README.md	
+++ b/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);
+    }
+}
+```
+
 ### **...**
 
 ```
diff --git a/solution/1500-1599/1523.Count Odd Numbers in an Interval Range/README_EN.md b/solution/1500-1599/1523.Count Odd Numbers in an Interval Range/README_EN.md
index c404787503dbb..7880b4250f34b 100644
--- a/solution/1500-1599/1523.Count Odd Numbers in an Interval Range/README_EN.md	
+++ b/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);
+    }
+}
+```
+
 ### **...**
 
 ```
diff --git a/solution/1500-1599/1523.Count Odd Numbers in an Interval Range/Solution.php b/solution/1500-1599/1523.Count Odd Numbers in an Interval Range/Solution.php
new file mode 100644
index 0000000000000..845bdb06fe598
--- /dev/null
+++ b/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);
+    }
+}
\ No newline at end of file