Update 0343.整数拆分.md

新增0343.整数拆分.md PHP 版本

problems/0343.整数拆分.md

@@ -469,6 +469,34 @@ object Solution {
 }
 ```
 
+
+### PHP
+```php
+class Solution {
+
+    /**
+     * @param Integer $n
+     * @return Integer
+     */
+    function integerBreak($n) {
+        if($n == 0 || $n == 1) return 0;
+        if($n == 2) return 1;
+
+        $dp = [];
+        $dp[0] = 0;
+        $dp[1] = 0;
+        $dp[2] = 1;
+        for($i=3;$i<=$n;$i++){
+            for($j = 1;$j <= $i/2; $j++){
+                $dp[$i] = max(($i-$j)*$j, $dp[$i-$j]*$j, $dp[$i]);
+            }
+        }
+
+        return $dp[$n];
+    }
+}
+```
+
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