添加 0383.赎金信 PHP版本

problems/0383.赎金信.md

@@ -266,6 +266,31 @@ var canConstruct = function(ransomNote, magazine) {
 };
 ```
 
+PHP:
+```php
+class Solution {
+    /**
+     * @param String $ransomNote
+     * @param String $magazine
+     * @return Boolean
+     */
+    function canConstruct($ransomNote, $magazine) {
+        if (count($ransomNote) > count($magazine)) {
+            return false;
+        }
+        $map = [];
+        for ($i = 0; $i < strlen($magazine); $i++) {
+            $map[$magazine[$i]] = ($map[$magazine[$i]] ?? 0) + 1;
+        }
+        for ($i = 0; $i < strlen($ransomNote); $i++) {
+            if (!isset($map[$ransomNote[$i]]) || --$map[$ransomNote[$i]] < 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
+```
 
 
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