diff --git a/problems/0977.有序数组的平方.md b/problems/0977.有序数组的平方.md
index 13142853..250234e1 100644
--- a/problems/0977.有序数组的平方.md
+++ b/problems/0977.有序数组的平方.md
@@ -270,6 +270,33 @@ def sorted_squares(nums)
 end
 ```
 
+PHP:
+```php
+class Solution {
+    /**
+     * @param Integer[] $nums
+     * @return Integer[]
+     */
+    function sortedSquares($nums) {
+        $res = [];
+        for ($i = 0; $i < count($nums); $i++) {
+            $res[$i] = 0;
+        }
+        $k = count($nums) - 1;
+        for ($i = 0, $j = count($nums) - 1; $i <= $j; ) {
+            if ($nums[$i] ** 2 < $nums[$j] ** 2) {
+                $res[$k--] = $nums[$j] ** 2;
+                $j--;
+            }
+            else {
+                $res[$k--] = $nums[$i] ** 2;
+                $i++;
+            }
+        } 
+        return $res;
+    }
+}
+```
 
 
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