diff --git a/solution/0100-0199/0100.Same Tree/README.md b/solution/0100-0199/0100.Same Tree/README.md
index 5231442dc63c2..982f79d32854a 100644
--- a/solution/0100-0199/0100.Same Tree/README.md	
+++ b/solution/0100-0199/0100.Same Tree/README.md	
@@ -566,6 +566,43 @@ impl Solution {
 }
 ```
 
+### **PHP**
+
+```php
+/**
+ * Definition for a binary tree node.
+ * class TreeNode {
+ *     public $val = null;
+ *     public $left = null;
+ *     public $right = null;
+ *     function __construct($val = 0, $left = null, $right = null) {
+ *         $this->val = $val;
+ *         $this->left = $left;
+ *         $this->right = $right;
+ *     }
+ * }
+ */
+class Solution {
+    /**
+     * @param TreeNode $p
+     * @param TreeNode $q
+     * @return Boolean
+     */
+    function isSameTree($p, $q) {
+        if ($p == Null && $q == Null) {
+            return true;
+        }
+        if ($p == Null || $q == Null) {
+            return false;
+        }
+        if ($p->val != $q->val) {
+            return false;
+        }
+        return $this->isSameTree($p->left, $q->left) && $this->isSameTree($p->right, $q->right);
+    }
+}  
+```
+
 ### **...**
 
 ```
diff --git a/solution/0100-0199/0100.Same Tree/README_EN.md b/solution/0100-0199/0100.Same Tree/README_EN.md
index 14d2571faeedd..d83a6de06deb4 100644
--- a/solution/0100-0199/0100.Same Tree/README_EN.md	
+++ b/solution/0100-0199/0100.Same Tree/README_EN.md	
@@ -538,6 +538,43 @@ impl Solution {
 }
 ```
 
+### **PHP**
+
+```php
+/**
+ * Definition for a binary tree node.
+ * class TreeNode {
+ *     public $val = null;
+ *     public $left = null;
+ *     public $right = null;
+ *     function __construct($val = 0, $left = null, $right = null) {
+ *         $this->val = $val;
+ *         $this->left = $left;
+ *         $this->right = $right;
+ *     }
+ * }
+ */
+class Solution {
+    /**
+     * @param TreeNode $p
+     * @param TreeNode $q
+     * @return Boolean
+     */
+    function isSameTree($p, $q) {
+        if ($p == Null && $q == Null) {
+            return true;
+        }
+        if ($p == Null || $q == Null) {
+            return false;
+        }
+        if ($p->val != $q->val) {
+            return false;
+        }
+        return $this->isSameTree($p->left, $q->left) && $this->isSameTree($p->right, $q->right);
+    }
+}
+```
+
 ### **...**
 
 ```
diff --git a/solution/0100-0199/0100.Same Tree/Solution.php b/solution/0100-0199/0100.Same Tree/Solution.php
new file mode 100644
index 0000000000000..859d927d7723b
--- /dev/null
+++ b/solution/0100-0199/0100.Same Tree/Solution.php	
@@ -0,0 +1,32 @@
+/**
+ * Definition for a binary tree node.
+ * class TreeNode {
+ *     public $val = null;
+ *     public $left = null;
+ *     public $right = null;
+ *     function __construct($val = 0, $left = null, $right = null) {
+ *         $this->val = $val;
+ *         $this->left = $left;
+ *         $this->right = $right;
+ *     }
+ * }
+ */
+class Solution {
+    /**
+     * @param TreeNode $p
+     * @param TreeNode $q
+     * @return Boolean
+     */
+    function isSameTree($p, $q) {
+        if ($p == Null && $q == Null) {
+            return true;
+        }
+        if ($p == Null || $q == Null) {
+            return false;
+        }
+        if ($p->val != $q->val) {
+            return false;
+        }
+        return $this->isSameTree($p->left, $q->left) && $this->isSameTree($p->right, $q->right);
+    }
+}
\ No newline at end of file