Add solution for Goal Parser Interpretation problem

Author: Amir-16

Easy/1678. Goal Parser Interpretation/solution.php

@@ -0,0 +1,32 @@
+<?php
+class Solution
+{
+    /**
+     * @param String $command
+     * @return String
+     */
+    public function interpret($command)
+    {
+        $result = '';
+
+        $length = strlen($command);
+
+        for ($i = 0; $i < $length; $i++) {
+            if ($command[$i] === 'G') {
+                $result .= 'G';
+            } elseif ($command[$i] === '(') {
+                if ($command[$i + 1] === ')') {
+                    $result .= 'o';
+                    $i++;
+                } else {
+                    $result .= 'al';
+                    $i += 3;
+                }
+            }
+        }
+        return $result;
+    }
+}
+// Example usage:
+$solution = new Solution();
+echo $solution->interpret("G()(al)") . "\n";